LDP: Update POT and ja.po to LDP v3.79

[linuxjm/LDP_man-pages.git] / po4a / signal / po / signal.pot

# SOME DESCRIPTIVE TITLE
# Copyright (C) YEAR Free Software Foundation, Inc.
# This file is distributed under the same license as the PACKAGE package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"POT-Creation-Date: 2015-02-04 23:33+0900\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"Language: \n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"

#. type: TH
#: build/C/man3/bsd_signal.3:25
#, no-wrap
msgid "BSD_SIGNAL"
msgstr ""

#. type: TH
#: build/C/man3/bsd_signal.3:25
#, no-wrap
msgid "2013-10-22"
msgstr ""

#. type: TH
#: build/C/man3/bsd_signal.3:25 build/C/man2/eventfd.2:22 build/C/man2/getitimer.2:12 build/C/man3/gsignal.3:27 build/C/man2/kill.2:44 build/C/man2/killpg.2:42 build/C/man2/pause.2:30 build/C/man2/prctl.2:54 build/C/man3/profil.3:28 build/C/man3/psignal.3:30 build/C/man3/raise.3:29 build/C/man2/restart_syscall.2:33 build/C/man2/rt_sigqueueinfo.2:25 build/C/man2/s390_runtime_instr.2:25 build/C/man2/sgetmask.2:26 build/C/man2/sigaction.2:49 build/C/man2/sigaltstack.2:27 build/C/man7/sigevent.7:26 build/C/man3/siginterrupt.3:31 build/C/man2/signal.2:36 build/C/man7/signal.7:46 build/C/man2/signalfd.2:20 build/C/man3/sigpause.3:25 build/C/man2/sigpending.2:29 build/C/man2/sigprocmask.2:29 build/C/man3/sigqueue.3:28 build/C/man2/sigreturn.2:30 build/C/man3/sigset.3:26 build/C/man3/sigsetops.3:31 build/C/man2/sigsuspend.2:29 build/C/man3/sigvec.3:26 build/C/man3/sigwait.3:26 build/C/man2/sigwaitinfo.2:25 build/C/man3/sysv_signal.3:25 build/C/man2/timer_create.2:33 build/C/man2/timer_delete.2:26 build/C/man2/timer_getoverrun.2:26 build/C/man2/timer_settime.2:26 build/C/man2/timerfd_create.2:22 build/C/man2/tkill.2:29 build/C/man2/wait.2:49 build/C/man2/wait4.2:33
#, no-wrap
msgid "Linux Programmer's Manual"
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:26 build/C/man2/eventfd.2:23 build/C/man2/getitimer.2:13 build/C/man3/gsignal.3:28 build/C/man2/kill.2:45 build/C/man2/killpg.2:43 build/C/man2/pause.2:31 build/C/man2/prctl.2:55 build/C/man3/profil.3:29 build/C/man3/psignal.3:31 build/C/man3/raise.3:30 build/C/man2/restart_syscall.2:34 build/C/man2/rt_sigqueueinfo.2:26 build/C/man2/s390_runtime_instr.2:26 build/C/man2/sgetmask.2:27 build/C/man2/sigaction.2:50 build/C/man2/sigaltstack.2:28 build/C/man7/sigevent.7:27 build/C/man3/siginterrupt.3:32 build/C/man2/signal.2:37 build/C/man7/signal.7:47 build/C/man2/signalfd.2:21 build/C/man3/sigpause.3:26 build/C/man2/sigpending.2:30 build/C/man2/sigprocmask.2:30 build/C/man3/sigqueue.3:29 build/C/man2/sigreturn.2:31 build/C/man3/sigset.3:27 build/C/man3/sigsetops.3:32 build/C/man2/sigsuspend.2:30 build/C/man3/sigvec.3:27 build/C/man3/sigwait.3:27 build/C/man2/sigwaitinfo.2:26 build/C/man3/sysv_signal.3:26 build/C/man2/timer_create.2:34 build/C/man2/timer_delete.2:27 build/C/man2/timer_getoverrun.2:27 build/C/man2/timer_settime.2:27 build/C/man2/timerfd_create.2:23 build/C/man2/tkill.2:30 build/C/man2/wait.2:50 build/C/man2/wait4.2:34
#, no-wrap
msgid "NAME"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:28
msgid "bsd_signal - signal handling with BSD semantics"
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:28 build/C/man2/eventfd.2:25 build/C/man2/getitimer.2:15 build/C/man3/gsignal.3:30 build/C/man2/kill.2:47 build/C/man2/killpg.2:45 build/C/man2/pause.2:33 build/C/man2/prctl.2:57 build/C/man3/profil.3:31 build/C/man3/psignal.3:33 build/C/man3/raise.3:32 build/C/man2/restart_syscall.2:36 build/C/man2/rt_sigqueueinfo.2:28 build/C/man2/s390_runtime_instr.2:28 build/C/man2/sgetmask.2:29 build/C/man2/sigaction.2:52 build/C/man2/sigaltstack.2:30 build/C/man7/sigevent.7:29 build/C/man3/siginterrupt.3:34 build/C/man2/signal.2:39 build/C/man2/signalfd.2:23 build/C/man3/sigpause.3:28 build/C/man2/sigpending.2:32 build/C/man2/sigprocmask.2:32 build/C/man3/sigqueue.3:31 build/C/man2/sigreturn.2:33 build/C/man3/sigset.3:29 build/C/man3/sigsetops.3:35 build/C/man2/sigsuspend.2:32 build/C/man3/sigvec.3:29 build/C/man3/sigwait.3:29 build/C/man2/sigwaitinfo.2:28 build/C/man3/sysv_signal.3:28 build/C/man2/timer_create.2:36 build/C/man2/timer_delete.2:29 build/C/man2/timer_getoverrun.2:29 build/C/man2/timer_settime.2:30 build/C/man2/timerfd_create.2:26 build/C/man2/tkill.2:32 build/C/man2/wait.2:52 build/C/man2/wait4.2:36
#, no-wrap
msgid "SYNOPSIS"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:30
msgid "B<#define _XOPEN_SOURCE> /* See feature_test_macros(7) */"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:32 build/C/man2/killpg.2:47 build/C/man2/sigaltstack.2:32 build/C/man2/signal.2:41 build/C/man2/sigpending.2:34 build/C/man2/sigprocmask.2:34 build/C/man3/sigqueue.3:33 build/C/man3/sigset.3:31 build/C/man3/sigsetops.3:37 build/C/man2/sigsuspend.2:34 build/C/man3/sigvec.3:31 build/C/man3/sysv_signal.3:32
msgid "B<#include E<lt>signal.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:34 build/C/man2/signal.2:43 build/C/man3/sigset.3:33 build/C/man3/sysv_signal.3:34
msgid "B<typedef void (*sighandler_t)(int);>"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:36
msgid "B<sighandler_t bsd_signal(int >I<signum>B<, sighandler_t >I<handler>B<);>"
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:36 build/C/man2/eventfd.2:29 build/C/man2/getitimer.2:24 build/C/man3/gsignal.3:49 build/C/man2/kill.2:65 build/C/man2/killpg.2:60 build/C/man2/pause.2:37 build/C/man2/prctl.2:64 build/C/man3/profil.3:46 build/C/man3/psignal.3:56 build/C/man3/raise.3:38 build/C/man2/restart_syscall.2:41 build/C/man2/rt_sigqueueinfo.2:38 build/C/man2/s390_runtime_instr.2:34 build/C/man2/sgetmask.2:36 build/C/man2/sigaction.2:72 build/C/man2/sigaltstack.2:51 build/C/man7/sigevent.7:52 build/C/man3/siginterrupt.3:55 build/C/man2/signal.2:45 build/C/man7/signal.7:49 build/C/man2/signalfd.2:27 build/C/man3/sigpause.3:36 build/C/man2/sigpending.2:46 build/C/man2/sigprocmask.2:47 build/C/man3/sigqueue.3:43 build/C/man2/sigreturn.2:35 build/C/man3/sigset.3:58 build/C/man3/sigsetops.3:63 build/C/man2/sigsuspend.2:46 build/C/man3/sigvec.3:49 build/C/man3/sigwait.3:45 build/C/man2/sigwaitinfo.2:46 build/C/man3/sysv_signal.3:36 build/C/man2/timer_create.2:54 build/C/man2/timer_delete.2:45 build/C/man2/timer_getoverrun.2:45 build/C/man2/timer_settime.2:50 build/C/man2/timerfd_create.2:38 build/C/man2/tkill.2:41 build/C/man2/wait.2:83 build/C/man2/wait4.2:67
#, no-wrap
msgid "DESCRIPTION"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:41
msgid ""
"The B<bsd_signal>()  function takes the same arguments, and performs the "
"same task, as B<signal>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:54
msgid ""
"The difference between the two is that B<bsd_signal>()  is guaranteed to "
"provide reliable signal semantics, that is: a) the disposition of the signal "
"is not reset to the default when the handler is invoked; b) delivery of "
"further instances of the signal is blocked while the signal handler is "
"executing; and c) if the handler interrupts a blocking system call, then the "
"system call is automatically restarted.  A portable application cannot rely "
"on B<signal>(2)  to provide these guarantees."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:54 build/C/man2/eventfd.2:222 build/C/man2/getitimer.2:129 build/C/man2/kill.2:100 build/C/man2/killpg.2:89 build/C/man2/pause.2:42 build/C/man2/prctl.2:892 build/C/man3/profil.3:68 build/C/man3/psignal.3:89 build/C/man3/raise.3:61 build/C/man2/restart_syscall.2:88 build/C/man2/rt_sigqueueinfo.2:129 build/C/man2/s390_runtime_instr.2:54 build/C/man2/sgetmask.2:59 build/C/man2/sigaction.2:728 build/C/man2/sigaltstack.2:133 build/C/man3/siginterrupt.3:73 build/C/man2/signal.2:97 build/C/man2/signalfd.2:251 build/C/man3/sigpause.3:48 build/C/man2/sigpending.2:53 build/C/man2/sigprocmask.2:93 build/C/man3/sigqueue.3:83 build/C/man2/sigreturn.2:65 build/C/man3/sigset.3:129 build/C/man3/sigsetops.3:107 build/C/man2/sigsuspend.2:70 build/C/man3/sigvec.3:199 build/C/man3/sigwait.3:69 build/C/man2/sigwaitinfo.2:105 build/C/man3/sysv_signal.3:51 build/C/man2/timer_create.2:169 build/C/man2/timer_delete.2:53 build/C/man2/timer_getoverrun.2:82 build/C/man2/timer_settime.2:173 build/C/man2/timerfd_create.2:294 build/C/man2/tkill.2:88 build/C/man2/wait.2:355 build/C/man2/wait4.2:132
#, no-wrap
msgid "RETURN VALUE"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:60
msgid ""
"The B<bsd_signal>()  function returns the previous value of the signal "
"handler, or B<SIG_ERR> on error."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:60 build/C/man2/eventfd.2:229 build/C/man2/getitimer.2:134 build/C/man2/kill.2:105 build/C/man2/killpg.2:94 build/C/man2/pause.2:53 build/C/man2/prctl.2:912 build/C/man2/restart_syscall.2:92 build/C/man2/rt_sigqueueinfo.2:134 build/C/man2/s390_runtime_instr.2:65 build/C/man2/sgetmask.2:64 build/C/man2/sigaction.2:733 build/C/man2/sigaltstack.2:137 build/C/man3/siginterrupt.3:83 build/C/man2/signal.2:105 build/C/man2/signalfd.2:265 build/C/man2/sigpending.2:59 build/C/man2/sigprocmask.2:99 build/C/man3/sigqueue.3:91 build/C/man3/sigset.3:154 build/C/man3/sigsetops.3:127 build/C/man2/sigsuspend.2:76 build/C/man3/sigvec.3:216 build/C/man3/sigwait.3:74 build/C/man2/sigwaitinfo.2:114 build/C/man3/sysv_signal.3:57 build/C/man2/timer_create.2:177 build/C/man2/timer_delete.2:60 build/C/man2/timer_getoverrun.2:90 build/C/man2/timer_settime.2:182 build/C/man2/timerfd_create.2:309 build/C/man2/tkill.2:92 build/C/man2/wait.2:385 build/C/man2/wait4.2:135
#, no-wrap
msgid "ERRORS"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:63 build/C/man3/sysv_signal.3:60
msgid "As for B<signal>(2)."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:63 build/C/man3/raise.3:64 build/C/man3/siginterrupt.3:87 build/C/man3/sigpause.3:56 build/C/man3/sigqueue.3:114 build/C/man3/sigsetops.3:132 build/C/man3/sigvec.3:221 build/C/man3/sigwait.3:80 build/C/man3/sysv_signal.3:60
#, no-wrap
msgid "ATTRIBUTES"
msgstr ""

#. type: SS
#: build/C/man3/bsd_signal.3:64 build/C/man3/raise.3:65 build/C/man3/siginterrupt.3:88 build/C/man3/sigpause.3:57 build/C/man3/sigqueue.3:115 build/C/man3/sigsetops.3:133 build/C/man3/sigvec.3:222 build/C/man3/sigwait.3:81 build/C/man3/sysv_signal.3:61
#, no-wrap
msgid "Multithreading (see pthreads(7))"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:68
msgid "The B<bsd_signal>()  function is thread-safe."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:68 build/C/man2/eventfd.2:266 build/C/man2/getitimer.2:155 build/C/man3/gsignal.3:95 build/C/man2/kill.2:121 build/C/man2/killpg.2:111 build/C/man2/pause.2:57 build/C/man2/prctl.2:1190 build/C/man3/profil.3:70 build/C/man3/psignal.3:99 build/C/man3/raise.3:69 build/C/man2/restart_syscall.2:100 build/C/man2/rt_sigqueueinfo.2:176 build/C/man2/s390_runtime_instr.2:81 build/C/man2/sgetmask.2:73 build/C/man2/sigaction.2:745 build/C/man2/sigaltstack.2:158 build/C/man7/sigevent.7:130 build/C/man3/siginterrupt.3:93 build/C/man2/signal.2:110 build/C/man7/signal.7:878 build/C/man2/signalfd.2:307 build/C/man3/sigpause.3:61 build/C/man2/sigpending.2:64 build/C/man2/sigprocmask.2:112 build/C/man3/sigqueue.3:119 build/C/man2/sigreturn.2:68 build/C/man3/sigset.3:173 build/C/man3/sigsetops.3:145 build/C/man2/sigsuspend.2:84 build/C/man3/sigvec.3:241 build/C/man3/sigwait.3:85 build/C/man2/sigwaitinfo.2:133 build/C/man3/sysv_signal.3:65 build/C/man2/timer_create.2:195 build/C/man2/timer_delete.2:67 build/C/man2/timer_getoverrun.2:97 build/C/man2/timer_settime.2:207 build/C/man2/timerfd_create.2:378 build/C/man2/tkill.2:109 build/C/man2/wait.2:423 build/C/man2/wait4.2:138
#, no-wrap
msgid "CONFORMING TO"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:75
msgid ""
"4.2BSD, POSIX.1-2001.  POSIX.1-2008 removes the specification of "
"B<bsd_signal>(), recommending the use of B<sigaction>(2)  instead."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:75 build/C/man2/eventfd.2:271 build/C/man2/getitimer.2:165 build/C/man2/kill.2:123 build/C/man2/killpg.2:115 build/C/man3/raise.3:71 build/C/man2/restart_syscall.2:102 build/C/man2/rt_sigqueueinfo.2:178 build/C/man2/s390_runtime_instr.2:84 build/C/man2/sgetmask.2:75 build/C/man2/sigaction.2:748 build/C/man2/sigaltstack.2:160 build/C/man2/signal.2:112 build/C/man2/signalfd.2:312 build/C/man3/sigpause.3:65 build/C/man2/sigpending.2:66 build/C/man2/sigprocmask.2:114 build/C/man3/sigqueue.3:121 build/C/man2/sigreturn.2:74 build/C/man3/sigset.3:190 build/C/man3/sigsetops.3:147 build/C/man2/sigsuspend.2:86 build/C/man3/sigvec.3:247 build/C/man3/sigwait.3:87 build/C/man2/sigwaitinfo.2:135 build/C/man3/sysv_signal.3:67 build/C/man2/timer_create.2:197 build/C/man2/timer_getoverrun.2:99 build/C/man2/tkill.2:115 build/C/man2/wait.2:425 build/C/man2/wait4.2:147
#, no-wrap
msgid "NOTES"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:81
msgid "Use of B<bsd_signal>()  should be avoided; use B<sigaction>(2)  instead."
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:92
msgid ""
"On modern Linux systems, B<bsd_signal>()  and B<signal>(2)  are equivalent.  "
"But on older systems, B<signal>(2)  provided unreliable signal semantics; "
"see B<signal>(2)  for details."
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:99 build/C/man3/sysv_signal.3:92
msgid ""
"The use of I<sighandler_t> is a GNU extension; this type is defined only if "
"the B<_GNU_SOURCE> feature test macro is defined."
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:99 build/C/man2/eventfd.2:417 build/C/man2/getitimer.2:246 build/C/man3/gsignal.3:103 build/C/man2/kill.2:171 build/C/man2/killpg.2:134 build/C/man2/pause.2:59 build/C/man2/prctl.2:1204 build/C/man3/profil.3:81 build/C/man3/psignal.3:113 build/C/man3/raise.3:82 build/C/man2/restart_syscall.2:135 build/C/man2/rt_sigqueueinfo.2:188 build/C/man2/s390_runtime_instr.2:88 build/C/man2/sgetmask.2:89 build/C/man2/sigaction.2:861 build/C/man2/sigaltstack.2:234 build/C/man7/sigevent.7:132 build/C/man3/siginterrupt.3:102 build/C/man2/signal.2:278 build/C/man7/signal.7:890 build/C/man2/signalfd.2:433 build/C/man3/sigpause.3:111 build/C/man2/sigpending.2:91 build/C/man2/sigprocmask.2:144 build/C/man3/sigqueue.3:154 build/C/man2/sigreturn.2:123 build/C/man3/sigset.3:266 build/C/man3/sigsetops.3:186 build/C/man2/sigsuspend.2:108 build/C/man3/sigvec.3:272 build/C/man3/sigwait.3:94 build/C/man2/sigwaitinfo.2:201 build/C/man3/sysv_signal.3:92 build/C/man2/timer_create.2:410 build/C/man2/timer_delete.2:69 build/C/man2/timer_getoverrun.2:131 build/C/man2/timer_settime.2:212 build/C/man2/timerfd_create.2:548 build/C/man2/tkill.2:124 build/C/man2/wait.2:635 build/C/man2/wait4.2:165
#, no-wrap
msgid "SEE ALSO"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:104
msgid "B<sigaction>(2), B<signal>(2), B<sysv_signal>(3), B<signal>(7)"
msgstr ""

#. type: SH
#: build/C/man3/bsd_signal.3:104 build/C/man2/eventfd.2:428 build/C/man2/getitimer.2:253 build/C/man3/gsignal.3:107 build/C/man2/kill.2:181 build/C/man2/killpg.2:140 build/C/man2/pause.2:64 build/C/man2/prctl.2:1207 build/C/man3/profil.3:87 build/C/man3/psignal.3:118 build/C/man3/raise.3:89 build/C/man2/restart_syscall.2:144 build/C/man2/rt_sigqueueinfo.2:196 build/C/man2/s390_runtime_instr.2:91 build/C/man2/sgetmask.2:92 build/C/man2/sigaction.2:883 build/C/man2/sigaltstack.2:241 build/C/man7/sigevent.7:142 build/C/man3/siginterrupt.3:104 build/C/man2/signal.2:297 build/C/man7/signal.7:925 build/C/man2/signalfd.2:446 build/C/man3/sigpause.3:119 build/C/man2/sigpending.2:99 build/C/man2/sigprocmask.2:155 build/C/man3/sigqueue.3:162 build/C/man2/sigreturn.2:130 build/C/man3/sigset.3:276 build/C/man3/sigsetops.3:191 build/C/man2/sigsuspend.2:118 build/C/man3/sigvec.3:282 build/C/man3/sigwait.3:102 build/C/man2/sigwaitinfo.2:213 build/C/man3/sysv_signal.3:97 build/C/man2/timer_create.2:425 build/C/man2/timer_delete.2:75 build/C/man2/timer_getoverrun.2:141 build/C/man2/timer_settime.2:216 build/C/man2/timerfd_create.2:560 build/C/man2/tkill.2:129 build/C/man2/wait.2:647 build/C/man2/wait4.2:172
#, no-wrap
msgid "COLOPHON"
msgstr ""

#. type: Plain text
#: build/C/man3/bsd_signal.3:112 build/C/man2/eventfd.2:436 build/C/man2/getitimer.2:261 build/C/man3/gsignal.3:115 build/C/man2/kill.2:189 build/C/man2/killpg.2:148 build/C/man2/pause.2:72 build/C/man2/prctl.2:1215 build/C/man3/profil.3:95 build/C/man3/psignal.3:126 build/C/man3/raise.3:97 build/C/man2/restart_syscall.2:152 build/C/man2/rt_sigqueueinfo.2:204 build/C/man2/s390_runtime_instr.2:99 build/C/man2/sgetmask.2:100 build/C/man2/sigaction.2:891 build/C/man2/sigaltstack.2:249 build/C/man7/sigevent.7:150 build/C/man3/siginterrupt.3:112 build/C/man2/signal.2:305 build/C/man7/signal.7:933 build/C/man2/signalfd.2:454 build/C/man3/sigpause.3:127 build/C/man2/sigpending.2:107 build/C/man2/sigprocmask.2:163 build/C/man3/sigqueue.3:170 build/C/man2/sigreturn.2:138 build/C/man3/sigset.3:284 build/C/man3/sigsetops.3:199 build/C/man2/sigsuspend.2:126 build/C/man3/sigvec.3:290 build/C/man3/sigwait.3:110 build/C/man2/sigwaitinfo.2:221 build/C/man3/sysv_signal.3:105 build/C/man2/timer_create.2:433 build/C/man2/timer_delete.2:83 build/C/man2/timer_getoverrun.2:149 build/C/man2/timer_settime.2:224 build/C/man2/timerfd_create.2:568 build/C/man2/tkill.2:137 build/C/man2/wait.2:655 build/C/man2/wait4.2:180
msgid ""
"This page is part of release 3.79 of the Linux I<man-pages> project.  A "
"description of the project, information about reporting bugs, and the latest "
"version of this page, can be found at "
"\\%http://www.kernel.org/doc/man-pages/."
msgstr ""

#. type: TH
#: build/C/man2/eventfd.2:22
#, no-wrap
msgid "EVENTFD"
msgstr ""

#. type: TH
#: build/C/man2/eventfd.2:22 build/C/man2/getitimer.2:12 build/C/man3/profil.3:28 build/C/man2/signalfd.2:20
#, no-wrap
msgid "2014-07-08"
msgstr ""

#. type: TH
#: build/C/man2/eventfd.2:22 build/C/man2/getitimer.2:12 build/C/man2/kill.2:44 build/C/man2/killpg.2:42 build/C/man2/pause.2:30 build/C/man2/prctl.2:54 build/C/man3/profil.3:28 build/C/man2/restart_syscall.2:33 build/C/man2/rt_sigqueueinfo.2:25 build/C/man2/sgetmask.2:26 build/C/man2/sigaction.2:49 build/C/man2/sigaltstack.2:27 build/C/man2/signal.2:36 build/C/man7/signal.7:46 build/C/man2/signalfd.2:20 build/C/man3/sigpause.3:25 build/C/man2/sigpending.2:29 build/C/man2/sigprocmask.2:29 build/C/man3/sigqueue.3:28 build/C/man2/sigreturn.2:30 build/C/man3/sigset.3:26 build/C/man3/sigsetops.3:31 build/C/man2/sigsuspend.2:29 build/C/man3/sigvec.3:26 build/C/man3/sigwait.3:26 build/C/man2/sigwaitinfo.2:25 build/C/man2/timer_create.2:33 build/C/man2/timer_delete.2:26 build/C/man2/timer_getoverrun.2:26 build/C/man2/timer_settime.2:26 build/C/man2/timerfd_create.2:22 build/C/man2/tkill.2:29 build/C/man2/wait.2:49 build/C/man2/wait4.2:33
#, no-wrap
msgid "Linux"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:25
msgid "eventfd - create a file descriptor for event notification"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:27
msgid "B<#include E<lt>sys/eventfd.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:29
msgid "B<int eventfd(unsigned int >I<initval>B<, int >I<flags>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:39
msgid ""
"B<eventfd>()  creates an \"eventfd object\" that can be used as an event "
"wait/notify mechanism by user-space applications, and by the kernel to "
"notify user-space applications of events.  The object contains an unsigned "
"64-bit integer (I<uint64_t>)  counter that is maintained by the kernel.  "
"This counter is initialized with the value specified in the argument "
"I<initval>."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:44
msgid ""
"The following values may be bitwise ORed in I<flags> to change the behavior "
"of B<eventfd>():"
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:44
#, no-wrap
msgid "B<EFD_CLOEXEC> (since Linux 2.6.27)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:54 build/C/man2/signalfd.2:95 build/C/man2/timerfd_create.2:110
msgid ""
"Set the close-on-exec (B<FD_CLOEXEC>)  flag on the new file descriptor.  See "
"the description of the B<O_CLOEXEC> flag in B<open>(2)  for reasons why this "
"may be useful."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:54
#, no-wrap
msgid "B<EFD_NONBLOCK> (since Linux 2.6.27)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:62 build/C/man2/signalfd.2:85 build/C/man2/timerfd_create.2:100
msgid ""
"Set the B<O_NONBLOCK> file status flag on the new open file description.  "
"Using this flag saves extra calls to B<fcntl>(2)  to achieve the same "
"result."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:62
#, no-wrap
msgid "B<EFD_SEMAPHORE> (since Linux 2.6.30)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:66
msgid ""
"Provide semaphore-like semantics for reads from the new file descriptor.  "
"See below."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:70 build/C/man2/signalfd.2:99
msgid ""
"In Linux up to version 2.6.26, the I<flags> argument is unused, and must be "
"specified as zero."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:76
msgid ""
"As its return value, B<eventfd>()  returns a new file descriptor that can be "
"used to refer to the eventfd object.  The following operations can be "
"performed on the file descriptor:"
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:76 build/C/man2/signalfd.2:102 build/C/man2/timerfd_create.2:218
#, no-wrap
msgid "B<read>(2)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:86
msgid ""
"Each successful B<read>(2)  returns an 8-byte integer.  A B<read>(2)  will "
"fail with the error B<EINVAL> if the size of the supplied buffer is less "
"than 8 bytes."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:91
msgid ""
"The value returned by B<read>(2)  is in host byte order\\(emthat is, the "
"native byte order for integers on the host machine."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:98
msgid ""
"The semantics of B<read>(2)  depend on whether the eventfd counter currently "
"has a nonzero value and whether the B<EFD_SEMAPHORE> flag was specified when "
"creating the eventfd file descriptor:"
msgstr ""

#. type: IP
#: build/C/man2/eventfd.2:99 build/C/man2/eventfd.2:106 build/C/man2/eventfd.2:113 build/C/man2/eventfd.2:158 build/C/man2/eventfd.2:168 build/C/man2/eventfd.2:178 build/C/man2/prctl.2:978 build/C/man2/prctl.2:983 build/C/man2/prctl.2:988 build/C/man2/prctl.2:998 build/C/man3/psignal.3:105 build/C/man3/psignal.3:109 build/C/man2/sigaction.2:318 build/C/man2/sigaction.2:333 build/C/man2/sigaction.2:349 build/C/man2/sigaction.2:364 build/C/man2/sigaction.2:411 build/C/man2/sigaction.2:458 build/C/man2/sigaction.2:472 build/C/man2/signal.2:68 build/C/man2/signal.2:73 build/C/man2/signal.2:80 build/C/man2/signal.2:224 build/C/man2/signal.2:228 build/C/man2/signal.2:244 build/C/man7/signal.7:149 build/C/man7/signal.7:157 build/C/man7/signal.7:615 build/C/man7/signal.7:617 build/C/man7/signal.7:638 build/C/man7/signal.7:672 build/C/man7/signal.7:676 build/C/man7/signal.7:683 build/C/man7/signal.7:701 build/C/man7/signal.7:711 build/C/man7/signal.7:718 build/C/man7/signal.7:723 build/C/man7/signal.7:725 build/C/man7/signal.7:729 build/C/man7/signal.7:748 build/C/man7/signal.7:762 build/C/man7/signal.7:773 build/C/man7/signal.7:780 build/C/man7/signal.7:789 build/C/man7/signal.7:797 build/C/man7/signal.7:803 build/C/man7/signal.7:823 build/C/man7/signal.7:837 build/C/man7/signal.7:848 build/C/man7/signal.7:851 build/C/man7/signal.7:854 build/C/man7/signal.7:857 build/C/man7/signal.7:864 build/C/man7/signal.7:870 build/C/man7/signal.7:874 build/C/man3/sigwait.3:62 build/C/man3/sigwait.3:67 build/C/man2/timer_create.2:218 build/C/man2/timer_create.2:221 build/C/man2/timer_create.2:224 build/C/man2/timer_create.2:228 build/C/man2/timer_create.2:231 build/C/man2/timer_create.2:246 build/C/man2/timer_create.2:250
#, no-wrap
msgid "*"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:106
msgid ""
"If B<EFD_SEMAPHORE> was not specified and the eventfd counter has a nonzero "
"value, then a B<read>(2)  returns 8 bytes containing that value, and the "
"counter's value is reset to zero."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:113
msgid ""
"If B<EFD_SEMAPHORE> was specified and the eventfd counter has a nonzero "
"value, then a B<read>(2)  returns 8 bytes containing the value 1, and the "
"counter's value is decremented by 1."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:123
msgid ""
"If the eventfd counter is zero at the time of the call to B<read>(2), then "
"the call either blocks until the counter becomes nonzero (at which time, the "
"B<read>(2)  proceeds as described above)  or fails with the error B<EAGAIN> "
"if the file descriptor has been made nonblocking."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:124
#, no-wrap
msgid "B<write>(2)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:141
msgid ""
"A B<write>(2)  call adds the 8-byte integer value supplied in its buffer to "
"the counter.  The maximum value that may be stored in the counter is the "
"largest unsigned 64-bit value minus 1 (i.e., 0xfffffffffffffffe).  If the "
"addition would cause the counter's value to exceed the maximum, then the "
"B<write>(2)  either blocks until a B<read>(2)  is performed on the file "
"descriptor, or fails with the error B<EAGAIN> if the file descriptor has "
"been made nonblocking."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:148
msgid ""
"A B<write>(2)  will fail with the error B<EINVAL> if the size of the "
"supplied buffer is less than 8 bytes, or if an attempt is made to write the "
"value 0xffffffffffffffff."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:148 build/C/man2/signalfd.2:140 build/C/man2/timerfd_create.2:251
#, no-wrap
msgid "B<poll>(2), B<select>(2) (and similar)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:157
msgid ""
"The returned file descriptor supports B<poll>(2)  (and analogously "
"B<epoll>(7))  and B<select>(2), as follows:"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:168
msgid ""
"The file descriptor is readable (the B<select>(2)  I<readfds> argument; the "
"B<poll>(2)  B<POLLIN> flag)  if the counter has a value greater than 0."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:178
msgid ""
"The file descriptor is writable (the B<select>(2)  I<writefds> argument; the "
"B<poll>(2)  B<POLLOUT> flag)  if it is possible to write a value of at least "
"\"1\" without blocking."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:198
msgid ""
"If an overflow of the counter value was detected, then B<select>(2)  "
"indicates the file descriptor as being both readable and writable, and "
"B<poll>(2)  returns a B<POLLERR> event.  As noted above, B<write>(2)  can "
"never overflow the counter.  However an overflow can occur if 2^64 eventfd "
"\"signal posts\" were performed by the KAIO subsystem (theoretically "
"possible, but practically unlikely).  If an overflow has occurred, then "
"B<read>(2)  will return that maximum I<uint64_t> value (i.e., "
"0xffffffffffffffff)."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:205
msgid ""
"The eventfd file descriptor also supports the other file-descriptor "
"multiplexing APIs: B<pselect>(2)  and B<ppoll>(2)."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:205 build/C/man2/signalfd.2:160 build/C/man2/timerfd_create.2:269
#, no-wrap
msgid "B<close>(2)"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:210
msgid ""
"When the file descriptor is no longer required it should be closed.  When "
"all file descriptors associated with the same eventfd object have been "
"closed, the resources for object are freed by the kernel."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:222
msgid ""
"A copy of the file descriptor created by B<eventfd>()  is inherited by the "
"child produced by B<fork>(2).  The duplicate file descriptor is associated "
"with the same eventfd object.  File descriptors created by B<eventfd>()  are "
"preserved across B<execve>(2), unless the close-on-exec flag has been set."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:229
msgid ""
"On success, B<eventfd>()  returns a new eventfd file descriptor.  On error, "
"-1 is returned and I<errno> is set to indicate the error."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:230 build/C/man2/getitimer.2:142 build/C/man2/kill.2:106 build/C/man2/killpg.2:95 build/C/man2/prctl.2:930 build/C/man2/prctl.2:935 build/C/man2/prctl.2:947 build/C/man2/prctl.2:952 build/C/man2/prctl.2:961 build/C/man2/prctl.2:971 build/C/man2/prctl.2:1011 build/C/man2/prctl.2:1021 build/C/man2/prctl.2:1029 build/C/man2/prctl.2:1040 build/C/man2/prctl.2:1049 build/C/man2/prctl.2:1063 build/C/man2/prctl.2:1075 build/C/man2/prctl.2:1086 build/C/man2/rt_sigqueueinfo.2:141 build/C/man2/s390_runtime_instr.2:66 build/C/man2/sigaction.2:738 build/C/man2/sigaltstack.2:142 build/C/man3/siginterrupt.3:84 build/C/man2/signal.2:106 build/C/man2/signalfd.2:271 build/C/man2/signalfd.2:279 build/C/man2/sigprocmask.2:107 build/C/man3/sigqueue.3:98 build/C/man3/sigsetops.3:128 build/C/man3/sigwait.3:75 build/C/man2/sigwaitinfo.2:129 build/C/man2/timer_create.2:181 build/C/man2/timer_delete.2:61 build/C/man2/timer_getoverrun.2:91 build/C/man2/timer_settime.2:191 build/C/man2/timer_settime.2:199 build/C/man2/timerfd_create.2:312 build/C/man2/timerfd_create.2:320 build/C/man2/timerfd_create.2:356 build/C/man2/timerfd_create.2:363 build/C/man2/timerfd_create.2:369 build/C/man2/tkill.2:93 build/C/man2/wait.2:418
#, no-wrap
msgid "B<EINVAL>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:234
msgid "An unsupported value was specified in I<flags>."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:234 build/C/man2/signalfd.2:286 build/C/man2/timerfd_create.2:327
#, no-wrap
msgid "B<EMFILE>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:237
msgid "The per-process limit on open file descriptors has been reached."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:237 build/C/man2/signalfd.2:289 build/C/man2/timerfd_create.2:330
#, no-wrap
msgid "B<ENFILE>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:241 build/C/man2/signalfd.2:293 build/C/man2/timerfd_create.2:334
msgid "The system-wide limit on the total number of open files has been reached."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:241 build/C/man2/signalfd.2:293 build/C/man2/timerfd_create.2:334
#, no-wrap
msgid "B<ENODEV>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:249 build/C/man2/signalfd.2:296 build/C/man2/timerfd_create.2:337
msgid "Could not mount (internal) anonymous inode device."
msgstr ""

#. type: TP
#: build/C/man2/eventfd.2:249 build/C/man2/s390_runtime_instr.2:73 build/C/man2/sigaltstack.2:147 build/C/man2/signalfd.2:296 build/C/man2/timer_create.2:189 build/C/man2/timerfd_create.2:337
#, no-wrap
msgid "B<ENOMEM>"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:253
msgid "There was insufficient memory to create a new eventfd file descriptor."
msgstr ""

#. type: SH
#: build/C/man2/eventfd.2:253 build/C/man2/prctl.2:1185 build/C/man3/psignal.3:95 build/C/man2/restart_syscall.2:96 build/C/man2/rt_sigqueueinfo.2:169 build/C/man2/s390_runtime_instr.2:79 build/C/man2/sgetmask.2:66 build/C/man2/signalfd.2:299 build/C/man3/sigqueue.3:112 build/C/man3/sigvec.3:234 build/C/man2/timer_create.2:193 build/C/man2/timer_delete.2:65 build/C/man2/timer_getoverrun.2:95 build/C/man2/timer_settime.2:205 build/C/man2/timerfd_create.2:375 build/C/man2/tkill.2:104
#, no-wrap
msgid "VERSIONS"
msgstr ""

#.  eventfd() is in glibc 2.7, but reportedly does not build
#. type: Plain text
#: build/C/man2/eventfd.2:266
msgid ""
"B<eventfd>()  is available on Linux since kernel 2.6.22.  Working support is "
"provided in glibc since version 2.8.  The B<eventfd2>()  system call (see "
"NOTES) is available on Linux since kernel 2.6.27.  Since version 2.9, the "
"glibc B<eventfd>()  wrapper will employ the B<eventfd2>()  system call, if "
"it is supported by the kernel."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:271
msgid "B<eventfd>()  and B<eventfd2>()  are Linux-specific."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:279
msgid ""
"Applications can use an eventfd file descriptor instead of a pipe (see "
"B<pipe>(2))  in all cases where a pipe is used simply to signal events.  The "
"kernel overhead of an eventfd file descriptor is much lower than that of a "
"pipe, and only one file descriptor is required (versus the two required for "
"a pipe)."
msgstr ""

#.  or eventually syslets/threadlets
#. type: Plain text
#: build/C/man2/eventfd.2:285
msgid ""
"When used in the kernel, an eventfd file descriptor can provide a bridge "
"from kernel to user space, allowing, for example, functionalities like KAIO "
"(kernel AIO)  to signal to a file descriptor that some operation is "
"complete."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:302
msgid ""
"A key point about an eventfd file descriptor is that it can be monitored "
"just like any other file descriptor using B<select>(2), B<poll>(2), or "
"B<epoll>(7).  This means that an application can simultaneously monitor the "
"readiness of \"traditional\" files and the readiness of other kernel "
"mechanisms that support the eventfd interface.  (Without the B<eventfd>()  "
"interface, these mechanisms could not be multiplexed via B<select>(2), "
"B<poll>(2), or B<epoll>(7).)"
msgstr ""

#. type: SS
#: build/C/man2/eventfd.2:302 build/C/man2/signalfd.2:326 build/C/man2/sigwaitinfo.2:183 build/C/man2/timer_create.2:243 build/C/man2/wait.2:525
#, no-wrap
msgid "C library/kernel ABI differences"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:316
msgid ""
"There are two underlying Linux system calls: B<eventfd>()  and the more "
"recent B<eventfd2>().  The former system call does not implement a I<flags> "
"argument.  The latter system call implements the I<flags> values described "
"above.  The glibc wrapper function will use B<eventfd2>()  where it is "
"available."
msgstr ""

#. type: SS
#: build/C/man2/eventfd.2:316
#, no-wrap
msgid "Additional glibc features"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:320
msgid ""
"The GNU C library defines an additional type, and two functions that attempt "
"to abstract some of the details of reading and writing on an eventfd file "
"descriptor:"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:324
#, no-wrap
msgid "typedef uint64_t eventfd_t;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:327
#, no-wrap
msgid ""
"int eventfd_read(int fd, eventfd_t *value);\n"
"int eventfd_write(int fd, eventfd_t value);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:334
msgid ""
"The functions perform the read and write operations on an eventfd file "
"descriptor, returning 0 if the correct number of bytes was transferred, or "
"-1 otherwise."
msgstr ""

#. type: SH
#: build/C/man2/eventfd.2:334 build/C/man2/sigaction.2:858 build/C/man2/sigaltstack.2:217 build/C/man2/signalfd.2:360 build/C/man3/sigwait.3:91 build/C/man2/timer_create.2:264 build/C/man2/timer_getoverrun.2:128 build/C/man2/timer_settime.2:209 build/C/man2/timerfd_create.2:386 build/C/man2/wait.2:552
#, no-wrap
msgid "EXAMPLE"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:343
msgid ""
"The following program creates an eventfd file descriptor and then forks to "
"create a child process.  While the parent briefly sleeps, the child writes "
"each of the integers supplied in the program's command-line arguments to the "
"eventfd file descriptor.  When the parent has finished sleeping, it reads "
"from the eventfd file descriptor."
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:345
msgid "The following shell session shows a sample run of the program:"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:357
#, no-wrap
msgid ""
"$B< ./a.out 1 2 4 7 14>\n"
"Child writing 1 to efd\n"
"Child writing 2 to efd\n"
"Child writing 4 to efd\n"
"Child writing 7 to efd\n"
"Child writing 14 to efd\n"
"Child completed write loop\n"
"Parent about to read\n"
"Parent read 28 (0x1c) from efd\n"
msgstr ""

#. type: SS
#: build/C/man2/eventfd.2:359 build/C/man2/signalfd.2:383 build/C/man2/timer_create.2:295 build/C/man2/timerfd_create.2:414 build/C/man2/wait.2:587
#, no-wrap
msgid "Program source"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:367
#, no-wrap
msgid ""
"#include E<lt>sys/eventfd.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
"#include E<lt>stdint.hE<gt>             /* Definition of uint64_t */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:370 build/C/man2/signalfd.2:394
#, no-wrap
msgid ""
"#define handle_error(msg) \\e\n"
"    do { perror(msg); exit(EXIT_FAILURE); } while (0)\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:377
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
"    int efd, j;\n"
"    uint64_t u;\n"
"    ssize_t s;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:382
#, no-wrap
msgid ""
"    if (argc E<lt> 2) {\n"
"        fprintf(stderr, \"Usage: %s E<lt>numE<gt>...\\en\", argv[0]);\n"
"        exit(EXIT_FAILURE);\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:386
#, no-wrap
msgid ""
"    efd = eventfd(0, 0);\n"
"    if (efd == -1)\n"
"        handle_error(\"eventfd\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:398
#, no-wrap
msgid ""
"    switch (fork()) {\n"
"    case 0:\n"
"        for (j = 1; j E<lt> argc; j++) {\n"
"            printf(\"Child writing %s to efd\\en\", argv[j]);\n"
"            u = strtoull(argv[j], NULL, 0);\n"
"                    /* strtoull() allows various bases */\n"
"            s = write(efd, &u, sizeof(uint64_t));\n"
"            if (s != sizeof(uint64_t))\n"
"                handle_error(\"write\");\n"
"        }\n"
"        printf(\"Child completed write loop\\en\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:400
#, no-wrap
msgid "        exit(EXIT_SUCCESS);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:403
#, no-wrap
msgid ""
"    default:\n"
"        sleep(2);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:411
#, no-wrap
msgid ""
"        printf(\"Parent about to read\\en\");\n"
"        s = read(efd, &u, sizeof(uint64_t));\n"
"        if (s != sizeof(uint64_t))\n"
"            handle_error(\"read\");\n"
"        printf(\"Parent read %llu (0x%llx) from efd\\en\",\n"
"                (unsigned long long) u, (unsigned long long) u);\n"
"        exit(EXIT_SUCCESS);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:416
#, no-wrap
msgid ""
"    case -1:\n"
"        handle_error(\"fork\");\n"
"    }\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/eventfd.2:428
msgid ""
"B<futex>(2), B<pipe>(2), B<poll>(2), B<read>(2), B<select>(2), "
"B<signalfd>(2), B<timerfd_create>(2), B<write>(2), B<epoll>(7), "
"B<sem_overview>(7)"
msgstr ""

#. type: TH
#: build/C/man2/getitimer.2:12
#, no-wrap
msgid "GETITIMER"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:15
msgid "getitimer, setitimer - get or set value of an interval timer"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:18
#, no-wrap
msgid "B<#include E<lt>sys/time.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:20
#, no-wrap
msgid "B<int getitimer(int >I<which>B<, struct itimerval *>I<curr_value>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:23
#, no-wrap
msgid ""
"B<int setitimer(int >I<which>B<, const struct itimerval *>I<new_value>B<,>\n"
"B<              struct itimerval *>I<old_value>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:29
msgid ""
"The system provides each process with three interval timers, each "
"decrementing in a distinct time domain.  When a timer expires, a signal is "
"sent to the process, and the timer is reset to the specified interval (if "
"nonzero)."
msgstr ""

#. type: TP
#: build/C/man2/getitimer.2:29
#, no-wrap
msgid "B<ITIMER_REAL>"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:34
msgid "decrements in real time, and delivers B<SIGALRM> upon expiration."
msgstr ""

#. type: TP
#: build/C/man2/getitimer.2:34
#, no-wrap
msgid "B<ITIMER_VIRTUAL>"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:39
msgid ""
"decrements only when the process is executing, and delivers B<SIGVTALRM> "
"upon expiration."
msgstr ""

#. type: TP
#: build/C/man2/getitimer.2:39
#, no-wrap
msgid "B<ITIMER_PROF>"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:49
msgid ""
"decrements both when the process executes and when the system is executing "
"on behalf of the process.  Coupled with B<ITIMER_VIRTUAL>, this timer is "
"usually used to profile the time spent by the application in user and kernel "
"space.  B<SIGPROF> is delivered upon expiration."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:51
msgid "Timer values are defined by the following structures:"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:59
#, no-wrap
msgid ""
"struct itimerval {\n"
"    struct timeval it_interval; /* Interval for periodic timer */\n"
"    struct timeval it_value;    /* Time until next expiration */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:64
#, no-wrap
msgid ""
"struct timeval {\n"
"    time_t      tv_sec;         /* seconds */\n"
"    suseconds_t tv_usec;        /* microseconds */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:90
msgid ""
"The function B<getitimer>()  fills the structure pointed to by I<curr_value> "
"with the current value (i.e., the amount of time remaining until the next "
"expiration)  of the timer specified by I<which> (one of B<ITIMER_REAL>, "
"B<ITIMER_VIRTUAL>, or B<ITIMER_PROF>).  The subfields of the field "
"I<it_value> are set to the amount of time remaining on the timer, or zero if "
"the timer is disabled.  The I<it_interval> field is set to the timer "
"interval (period); a value of zero returned in (both subfields of) this "
"field indicates that this is a single-shot timer."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:101
msgid ""
"The function B<setitimer>()  sets the specified timer to the value in "
"I<new_value>.  If I<old_value> is non-NULL, the old value of the timer "
"(i.e., the same information as returned by B<getitimer>())  is stored there."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:111
msgid ""
"Timers decrement from I<it_value> to zero, generate a signal, and reset to "
"I<it_interval>.  A timer which is set to zero (I<it_value> is zero or the "
"timer expires and I<it_interval> is zero) stops."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:117
msgid ""
"Both I<tv_sec> and I<tv_usec> are significant in determining the duration of "
"a timer."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:129
msgid ""
"Timers will never expire before the requested time, but may expire some "
"(short) time afterward, which depends on the system timer resolution and on "
"the system load; see B<time>(7).  (But see BUGS below.)  Upon expiration, a "
"signal will be generated and the timer reset.  If the timer expires while "
"the process is active (always true for B<ITIMER_VIRTUAL>), the signal will "
"be delivered immediately when generated.  Otherwise, the delivery will be "
"offset by a small time dependent on the system loading."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:134 build/C/man2/killpg.2:94 build/C/man2/tkill.2:92
msgid ""
"On success, zero is returned.  On error, -1 is returned, and I<errno> is set "
"appropriately."
msgstr ""

#. type: TP
#: build/C/man2/getitimer.2:135 build/C/man2/prctl.2:913 build/C/man2/prctl.2:917 build/C/man2/sigaction.2:734 build/C/man2/sigaltstack.2:138 build/C/man2/sigpending.2:60 build/C/man2/sigprocmask.2:100 build/C/man2/sigsuspend.2:77 build/C/man2/timer_settime.2:184 build/C/man2/timerfd_create.2:349
#, no-wrap
msgid "B<EFAULT>"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:142 build/C/man2/timerfd_create.2:356
msgid "I<new_value>, I<old_value>, or I<curr_value> is not valid a pointer."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:155
msgid ""
"I<which> is not one of B<ITIMER_REAL>, B<ITIMER_VIRTUAL>, or B<ITIMER_PROF>; "
"or (since Linux 2.6.22) one of the I<tv_usec> fields in the structure "
"pointed to by I<new_value> contains a value outside the range 0 to 999999."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:165
msgid ""
"POSIX.1-2001, SVr4, 4.4BSD (this call first appeared in 4.2BSD).  "
"POSIX.1-2008 marks B<getitimer>()  and B<setitimer>()  obsolete, "
"recommending the use of the POSIX timers API (B<timer_gettime>(2), "
"B<timer_settime>(2), etc.) instead."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:171
msgid ""
"A child created via B<fork>(2)  does not inherit its parent's interval "
"timers.  Interval timers are preserved across an B<execve>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:181
msgid ""
"POSIX.1 leaves the interaction between B<setitimer>()  and the three "
"interfaces B<alarm>(2), B<sleep>(3), and B<usleep>(3)  unspecified."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:183
msgid "The standards are silent on the meaning of the call:"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:185
#, no-wrap
msgid "    setitimer(which, NULL, &old_value);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:188
msgid ""
"Many systems (Solaris, the BSDs, and perhaps others)  treat this as "
"equivalent to:"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:190
#, no-wrap
msgid "    getitimer(which, &old_value);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:196
msgid ""
"In Linux, this is treated as being equivalent to a call in which the "
"I<new_value> fields are zero; that is, the timer is disabled.  I<Don't use "
"this Linux misfeature>: it is nonportable and unnecessary."
msgstr ""

#. type: SH
#: build/C/man2/getitimer.2:196 build/C/man2/kill.2:161 build/C/man3/profil.3:72 build/C/man3/psignal.3:101 build/C/man2/sigaction.2:849 build/C/man2/signalfd.2:352 build/C/man2/sigpending.2:85 build/C/man3/sigset.3:232 build/C/man2/timer_getoverrun.2:115 build/C/man2/timerfd_create.2:380 build/C/man2/wait.2:537
#, no-wrap
msgid "BUGS"
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:205
msgid ""
"The generation and delivery of a signal are distinct, and only one instance "
"of each of the signals listed above may be pending for a process.  Under "
"very heavy loading, an B<ITIMER_REAL> timer may expire before the signal "
"from a previous expiration has been delivered.  The second signal in such an "
"event will be lost."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:220
msgid ""
"On Linux kernels before 2.6.16, timer values are represented in jiffies.  If "
"a request is made set a timer with a value whose jiffies representation "
"exceeds B<MAX_SEC_IN_JIFFIES> (defined in I<include/linux/jiffies.h>), then "
"the timer is silently truncated to this ceiling value.  On Linux/i386 "
"(where, since Linux 2.6.13, the default jiffy is 0.004 seconds), this means "
"that the ceiling value for a timer is approximately 99.42 days.  Since Linux "
"2.6.16, the kernel uses a different internal representation for times, and "
"this ceiling is removed."
msgstr ""

#.  4 Jul 2005: It looks like this bug may remain in 2.4.x.
#.      http://lkml.org/lkml/2005/7/1/165
#. type: Plain text
#: build/C/man2/getitimer.2:227
msgid ""
"On certain systems (including i386), Linux kernels before version 2.6.12 "
"have a bug which will produce premature timer expirations of up to one jiffy "
"under some circumstances.  This bug is fixed in kernel 2.6.12."
msgstr ""

#.  Bugzilla report 25 Apr 2006:
#.  http://bugzilla.kernel.org/show_bug.cgi?id=6443
#.  "setitimer() should reject noncanonical arguments"
#. type: Plain text
#: build/C/man2/getitimer.2:246
msgid ""
"POSIX.1-2001 says that B<setitimer>()  should fail if a I<tv_usec> value is "
"specified that is outside of the range 0 to 999999.  However, in kernels up "
"to and including 2.6.21, Linux does not give an error, but instead silently "
"adjusts the corresponding seconds value for the timer.  From kernel 2.6.22 "
"onward, this nonconformance has been repaired: an improper I<tv_usec> value "
"results in an B<EINVAL> error."
msgstr ""

#. type: Plain text
#: build/C/man2/getitimer.2:253
msgid ""
"B<gettimeofday>(2), B<sigaction>(2), B<signal>(2), B<timer_create>(2), "
"B<timerfd_create>(2), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man3/gsignal.3:27
#, no-wrap
msgid "GSIGNAL"
msgstr ""

#. type: TH
#: build/C/man3/gsignal.3:27
#, no-wrap
msgid "2007-07-26"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:30
msgid "gsignal, ssignal - software signal facility"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:33 build/C/man2/kill.2:52 build/C/man3/psignal.3:36 build/C/man3/raise.3:35 build/C/man2/sigaction.2:55 build/C/man3/siginterrupt.3:37 build/C/man3/sigpause.3:31 build/C/man3/sigwait.3:32 build/C/man2/sigwaitinfo.2:31
#, no-wrap
msgid "B<#include E<lt>signal.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:35
#, no-wrap
msgid "B<typedef void (*sighandler_t)(int);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:37
#, no-wrap
msgid "B<int gsignal(int >I<signum>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:39
#, no-wrap
msgid "B<sighandler_t ssignal(int >I<signum>B<, sighandler_t >I<action>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:44 build/C/man2/kill.2:59 build/C/man2/killpg.2:53 build/C/man3/profil.3:42 build/C/man3/psignal.3:46 build/C/man2/sigaction.2:63 build/C/man2/sigaltstack.2:38 build/C/man3/siginterrupt.3:44 build/C/man2/sigpending.2:40 build/C/man2/sigprocmask.2:41 build/C/man3/sigqueue.3:39 build/C/man3/sigset.3:45 build/C/man3/sigsetops.3:51 build/C/man2/sigsuspend.2:40 build/C/man3/sigvec.3:45 build/C/man3/sigwait.3:39 build/C/man2/sigwaitinfo.2:41 build/C/man2/timer_create.2:50 build/C/man2/timer_delete.2:41 build/C/man2/timer_getoverrun.2:41 build/C/man2/timer_settime.2:45 build/C/man2/wait.2:69 build/C/man2/wait4.2:53
msgid "Feature Test Macro Requirements for glibc (see B<feature_test_macros>(7)):"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:49
msgid "B<gsignal>(), B<ssignal>(): _SVID_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:57
msgid ""
"Don't use these functions under Linux.  Due to a historical mistake, under "
"Linux these functions are aliases for B<raise>(3)  and B<signal>(2), "
"respectively."
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:95
msgid ""
"Elsewhere, on System V-like systems, these functions implement software "
"signaling, entirely independent of the classical B<signal>(2)  and "
"B<kill>(2)  functions.  The function B<ssignal>()  defines the action to "
"take when the software signal with number I<signum> is raised using the "
"function B<gsignal>(), and returns the previous such action or B<SIG_DFL>.  "
"The function B<gsignal>()  does the following: if no action (or the action "
"B<SIG_DFL>)  was specified for I<signum>, then it does nothing and returns "
"0.  If the action B<SIG_IGN> was specified for I<signum>, then it does "
"nothing and returns 1.  Otherwise, it resets the action to B<SIG_DFL> and "
"calls the action function with argument I<signum>, and returns the value "
"returned by that function.  The range of possible values I<signum> varies "
"(often 1-15 or 1-17)."
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:103
msgid ""
"These functions are available under AIX, DG/UX, HP-UX, SCO, Solaris, Tru64.  "
"They are called obsolete under most of these systems, and are broken under "
"Linux libc and glibc.  Some systems also have B<gsignal_r>()  and "
"B<ssignal_r>()."
msgstr ""

#. type: Plain text
#: build/C/man3/gsignal.3:107
msgid "B<kill>(2), B<signal>(2), B<raise>(3)"
msgstr ""

#. type: TH
#: build/C/man2/kill.2:44
#, no-wrap
msgid "KILL"
msgstr ""

#. type: TH
#: build/C/man2/kill.2:44
#, no-wrap
msgid "2013-09-17"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:47
msgid "kill - send signal to a process"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:50
#, no-wrap
msgid "B<#include E<lt>sys/types.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:54
#, no-wrap
msgid "B<int kill(pid_t >I<pid>B<, int >I<sig>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:64
msgid "B<kill>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:70
msgid ""
"The B<kill>()  system call can be used to send any signal to any process "
"group or process."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:73
msgid ""
"If I<pid> is positive, then signal I<sig> is sent to the process with the ID "
"specified by I<pid>."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:76
msgid ""
"If I<pid> equals 0, then I<sig> is sent to every process in the process "
"group of the calling process."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:80
msgid ""
"If I<pid> equals -1, then I<sig> is sent to every process for which the "
"calling process has permission to send signals, except for process 1 "
"(I<init>), but see below."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:83
msgid ""
"If I<pid> is less than -1, then I<sig> is sent to every process in the "
"process group whose ID is I<-pid>."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:88
msgid ""
"If I<sig> is 0, then no signal is sent, but error checking is still "
"performed; this can be used to check for the existence of a process ID or "
"process group ID."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:100
msgid ""
"For a process to have permission to send a signal it must either be "
"privileged (under Linux: have the B<CAP_KILL> capability), or the real or "
"effective user ID of the sending process must equal the real or saved "
"set-user-ID of the target process.  In the case of B<SIGCONT> it suffices "
"when the sending and receiving processes belong to the same session.  "
"(Historically, the rules were different; see NOTES.)"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:105
msgid ""
"On success (at least one signal was sent), zero is returned.  On error, -1 "
"is returned, and I<errno> is set appropriately."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:109
msgid "An invalid signal was specified."
msgstr ""

#. type: TP
#: build/C/man2/kill.2:109 build/C/man2/killpg.2:99 build/C/man2/prctl.2:1098 build/C/man2/prctl.2:1110 build/C/man2/prctl.2:1120 build/C/man2/prctl.2:1128 build/C/man2/rt_sigqueueinfo.2:148 build/C/man2/sigaltstack.2:153 build/C/man3/sigqueue.3:102 build/C/man2/tkill.2:96
#, no-wrap
msgid "B<EPERM>"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:113 build/C/man2/killpg.2:103
msgid ""
"The process does not have permission to send the signal to any of the target "
"processes."
msgstr ""

#. type: TP
#: build/C/man2/kill.2:113 build/C/man2/killpg.2:103 build/C/man2/killpg.2:107 build/C/man2/rt_sigqueueinfo.2:156 build/C/man3/sigqueue.3:108 build/C/man2/tkill.2:101
#, no-wrap
msgid "B<ESRCH>"
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:121
msgid ""
"The pid or process group does not exist.  Note that an existing process "
"might be a zombie, a process which already committed termination, but has "
"not yet been B<wait>(2)ed for."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:123 build/C/man2/pause.2:59 build/C/man2/wait.2:425
msgid "SVr4, 4.3BSD, POSIX.1-2001."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:131
msgid ""
"The only signals that can be sent to process ID 1, the I<init> process, are "
"those for which I<init> has explicitly installed signal handlers.  This is "
"done to assure the system is not brought down accidentally."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:137
msgid ""
"POSIX.1-2001 requires that I<kill(-1,sig)> send I<sig> to all processes that "
"the calling process may send signals to, except possibly for some "
"implementation-defined system processes.  Linux allows a process to signal "
"itself, but on Linux the call I<kill(-1,sig)> does not signal the calling "
"process."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:147
msgid ""
"POSIX.1-2001 requires that if a process sends a signal to itself, and the "
"sending thread does not have the signal blocked, and no other thread has it "
"unblocked or is waiting for it in B<sigwait>(3), at least one unblocked "
"signal must be delivered to the sending thread before the B<kill>()  "
"returns."
msgstr ""

#. type: SS
#: build/C/man2/kill.2:147 build/C/man3/sigpause.3:82 build/C/man2/wait.2:480
#, no-wrap
msgid "Linux notes"
msgstr ""

#.  In the 0.* kernels things chopped and changed quite
#.  a bit - MTK, 24 Jul 02
#. type: Plain text
#: build/C/man2/kill.2:161
msgid ""
"Across different kernel versions, Linux has enforced different rules for the "
"permissions required for an unprivileged process to send a signal to another "
"process.  In kernels 1.0 to 1.2.2, a signal could be sent if the effective "
"user ID of the sender matched effective user ID of the target, or the real "
"user ID of the sender matched the real user ID of the target.  From kernel "
"1.2.3 until 1.3.77, a signal could be sent if the effective user ID of the "
"sender matched either the real or effective user ID of the target.  The "
"current rules, which conform to POSIX.1-2001, were adopted in kernel 1.3.78."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:171
msgid ""
"In 2.6 kernels up to and including 2.6.7, there was a bug that meant that "
"when sending signals to a process group, B<kill>()  failed with the error "
"B<EPERM> if the caller did not have permission to send the signal to I<any> "
"(rather than I<all>) of the members of the process group.  Notwithstanding "
"this error return, the signal was still delivered to all of the processes "
"for which the caller had permission to signal."
msgstr ""

#. type: Plain text
#: build/C/man2/kill.2:181
msgid ""
"B<_exit>(2), B<killpg>(2), B<signal>(2), B<tkill>(2), B<exit>(3), "
"B<sigqueue>(3), B<capabilities>(7), B<credentials>(7), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/killpg.2:42
#, no-wrap
msgid "KILLPG"
msgstr ""

#. type: TH
#: build/C/man2/killpg.2:42 build/C/man3/sigset.3:26
#, no-wrap
msgid "2010-09-20"
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:45
msgid "killpg - send signal to a process group"
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:49
msgid "B<int killpg(int >I<pgrp>B<, int >I<sig>B<);>"
msgstr ""

#. type: TP
#: build/C/man2/killpg.2:55
#, no-wrap
msgid "B<killpg>():"
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:59 build/C/man2/sigaltstack.2:46 build/C/man3/siginterrupt.3:51 build/C/man2/wait4.2:60
msgid ""
"_BSD_SOURCE || _XOPEN_SOURCE\\ E<gt>=\\ 500 || _XOPEN_SOURCE\\ &&\\ "
"_XOPEN_SOURCE_EXTENDED"
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:69
msgid ""
"B<killpg>()  sends the signal I<sig> to the process group I<pgrp>.  See "
"B<signal>(7)  for a list of signals."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:78
msgid ""
"If I<pgrp> is 0, B<killpg>()  sends the signal to the calling process's "
"process group.  (POSIX says: If I<pgrp> is less than or equal to 1, the "
"behavior is undefined.)"
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:89
msgid ""
"For a process to have permission to send a signal it must either be "
"privileged (under Linux: have the B<CAP_KILL> capability), or the real or "
"effective user ID of the sending process must equal the real or saved "
"set-user-ID of the target process.  In the case of B<SIGCONT> it suffices "
"when the sending and receiving processes belong to the same session."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:99
msgid "I<sig> is not a valid signal number."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:107
msgid "No process can be found in the process group specified by I<pgrp>."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:111
msgid ""
"The process group was given as 0 but the sending process does not have a "
"process group."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:115
msgid ""
"SVr4, 4.4BSD (the B<killpg>()  function call first appeared in 4BSD), "
"POSIX.1-2001."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:129
msgid ""
"There are various differences between the permission checking in BSD-type "
"systems and System\\ V-type systems.  See the POSIX rationale for "
"B<kill>().  A difference not mentioned by POSIX concerns the return value "
"B<EPERM>: BSD documents that no signal is sent and B<EPERM> returned when "
"the permission check failed for at least one target process, while POSIX "
"documents B<EPERM> only when the permission check failed for all target "
"processes."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:134
msgid ""
"On Linux, B<killpg>()  is implemented as a library function that makes the "
"call I<kill(-pgrp,\\ sig)>."
msgstr ""

#. type: Plain text
#: build/C/man2/killpg.2:140
msgid ""
"B<getpgrp>(2), B<kill>(2), B<signal>(2), B<capabilities>(7), "
"B<credentials>(7)"
msgstr ""

#. type: TH
#: build/C/man2/pause.2:30
#, no-wrap
msgid "PAUSE"
msgstr ""

#. type: TH
#: build/C/man2/pause.2:30
#, no-wrap
msgid "2008-10-06"
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:33
msgid "pause - wait for signal"
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:35
msgid "B<#include E<lt>unistd.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:37
msgid "B<int pause(void);>"
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:42
msgid ""
"B<pause>()  causes the calling process (or thread) to sleep until a signal "
"is delivered that either terminates the process or causes the invocation of "
"a signal-catching function."
msgstr ""

#.  .BR ERESTARTNOHAND .
#. type: Plain text
#: build/C/man2/pause.2:53
msgid ""
"B<pause>()  returns only when a signal was caught and the signal-catching "
"function returned.  In this case, B<pause>()  returns -1, and I<errno> is "
"set to B<EINTR>."
msgstr ""

#. type: TP
#: build/C/man2/pause.2:54 build/C/man2/sigsuspend.2:81 build/C/man2/sigwaitinfo.2:123 build/C/man2/wait.2:411
#, no-wrap
msgid "B<EINTR>"
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:57
msgid "a signal was caught and the signal-catching function returned."
msgstr ""

#. type: Plain text
#: build/C/man2/pause.2:64
msgid "B<kill>(2), B<select>(2), B<signal>(2), B<sigsuspend>(2)"
msgstr ""

#. type: TH
#: build/C/man2/prctl.2:54
#, no-wrap
msgid "PRCTL"
msgstr ""

#. type: TH
#: build/C/man2/prctl.2:54 build/C/man7/signal.7:46
#, no-wrap
msgid "2015-02-01"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:57
msgid "prctl - operations on a process"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:60
#, no-wrap
msgid "B<#include E<lt>sys/prctl.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:63
#, no-wrap
msgid ""
"B<int prctl(int >I<option>B<, unsigned long >I<arg2>B<, unsigned long "
">I<arg3>B<,>\n"
"B<          unsigned long >I<arg4>B<, unsigned long >I<arg5>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:70
msgid ""
"B<prctl>()  is called with a first argument describing what to do (with "
"values defined in I<E<lt>linux/prctl.hE<gt>>), and further arguments with a "
"significance depending on the first one.  The first argument can be:"
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:70
#, no-wrap
msgid "B<PR_CAPBSET_READ> (since Linux 2.6.25)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:82
msgid ""
"Return (as the function result) 1 if the capability specified in I<arg2> is "
"in the calling thread's capability bounding set, or 0 if it is not.  (The "
"capability constants are defined in I<E<lt>linux/capability.hE<gt>>.)  The "
"capability bounding set dictates whether the process can receive the "
"capability through a file's permitted capability set on a subsequent call to "
"B<execve>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:87
msgid ""
"If the capability specified in I<arg2> is not valid, then the call fails "
"with the error B<EINVAL>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:87
#, no-wrap
msgid "B<PR_CAPBSET_DROP> (since Linux 2.6.25)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:96
msgid ""
"If the calling thread has the B<CAP_SETPCAP> capability, then drop the "
"capability specified by I<arg2> from the calling thread's capability "
"bounding set.  Any children of the calling thread will inherit the newly "
"reduced bounding set."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:108
msgid ""
"The call fails with the error: B<EPERM> if the calling thread does not have "
"the B<CAP_SETPCAP>; B<EINVAL> if I<arg2> does not represent a valid "
"capability; or B<EINVAL> if file capabilities are not enabled in the kernel, "
"in which case bounding sets are not supported."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:108
#, no-wrap
msgid "B<PR_SET_CHILD_SUBREAPER> (since Linux 3.4)"
msgstr ""

#.  commit ebec18a6d3aa1e7d84aab16225e87fd25170ec2b
#. type: Plain text
#: build/C/man2/prctl.2:133
msgid ""
"If I<arg2> is nonzero, set the \"child subreaper\" attribute of the calling "
"process; if I<arg2> is zero, unset the attribute.  When a process is marked "
"as a child subreaper, all of the children that it creates, and their "
"descendants, will be marked as having a subreaper.  In effect, a subreaper "
"fulfills the role of B<init>(1)  for its descendant processes.  Upon "
"termination of a process that is orphaned (i.e., its immediate parent has "
"already terminated)  and marked as having a subreaper, the nearest still "
"living ancestor subreaper will receive a B<SIGCHLD> signal and be able to "
"B<wait>(2)  on the process to discover its termination status."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:133
#, no-wrap
msgid "B<PR_GET_CHILD_SUBREAPER> (since Linux 3.4)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:138
msgid ""
"Return the \"child subreaper\" setting of the caller, in the location "
"pointed to by I<(int\\ *) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:138
#, no-wrap
msgid "B<PR_SET_DUMPABLE> (since Linux 2.3.20)"
msgstr ""

#.  See http://marc.theaimsgroup.com/?l=linux-kernel&m=115270289030630&w=2
#.  Subject:    Fix prctl privilege escalation (CVE-2006-2451)
#.  From:       Marcel Holtmann <marcel () holtmann ! org>
#.  Date:       2006-07-12 11:12:00
#. type: Plain text
#: build/C/man2/prctl.2:164
msgid ""
"Set the state of the flag determining whether core dumps are produced for "
"the calling process upon delivery of a signal whose default behavior is to "
"produce a core dump.  (Normally, this flag is set for a process by default, "
"but it is cleared when a set-user-ID or set-group-ID program is executed and "
"also by various system calls that manipulate process UIDs and GIDs).  In "
"kernels up to and including 2.6.12, I<arg2> must be either 0 (process is not "
"dumpable) or 1 (process is dumpable).  Between kernels 2.6.13 and 2.6.17, "
"the value 2 was also permitted, which caused any binary which normally would "
"not be dumped to be dumped readable by root only; for security reasons, this "
"feature has been removed.  (See also the description of "
"I</proc/sys/fs/suid_dumpable> in B<proc>(5).)  Processes that are not "
"dumpable can not be attached via B<ptrace>(2)  B<PTRACE_ATTACH>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:164
#, no-wrap
msgid "B<PR_GET_DUMPABLE> (since Linux 2.3.20)"
msgstr ""

#.  Since Linux 2.6.13, the dumpable flag can have the value 2,
#.  but in 2.6.13 PR_GET_DUMPABLE simply returns 1 if the dumpable
#.  flags has a nonzero value.  This was fixed in 2.6.14.
#. type: Plain text
#: build/C/man2/prctl.2:171
msgid ""
"Return (as the function result) the current state of the calling process's "
"dumpable flag."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:171
#, no-wrap
msgid "B<PR_SET_ENDIAN> (since Linux 2.6.18, PowerPC only)"
msgstr ""

#.  Respectively 0, 1, 2
#. type: Plain text
#: build/C/man2/prctl.2:181
msgid ""
"Set the endian-ness of the calling process to the value given in I<arg2>, "
"which should be one of the following: B<PR_ENDIAN_BIG>, B<PR_ENDIAN_LITTLE>, "
"or B<PR_ENDIAN_PPC_LITTLE> (PowerPC pseudo little endian)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:181
#, no-wrap
msgid "B<PR_GET_ENDIAN> (since Linux 2.6.18, PowerPC only)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:186
msgid ""
"Return the endian-ness of the calling process, in the location pointed to by "
"I<(int\\ *) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:186
#, no-wrap
msgid "B<PR_SET_FPEMU> (since Linux 2.4.18, 2.5.9, only on ia64)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:193
msgid ""
"Set floating-point emulation control bits to I<arg2>.  Pass "
"B<PR_FPEMU_NOPRINT> to silently emulate fp operations accesses, or "
"B<PR_FPEMU_SIGFPE> to not emulate fp operations and send B<SIGFPE> instead."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:193
#, no-wrap
msgid "B<PR_GET_FPEMU> (since Linux 2.4.18, 2.5.9, only on ia64)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:198
msgid ""
"Return floating-point emulation control bits, in the location pointed to by "
"I<(int\\ *) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:198
#, no-wrap
msgid "B<PR_SET_FPEXC> (since Linux 2.4.21, 2.5.32, only on PowerPC)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:211
msgid ""
"Set floating-point exception mode to I<arg2>.  Pass B<PR_FP_EXC_SW_ENABLE> "
"to use FPEXC for FP exception enables, B<PR_FP_EXC_DIV> for floating-point "
"divide by zero, B<PR_FP_EXC_OVF> for floating-point overflow, "
"B<PR_FP_EXC_UND> for floating-point underflow, B<PR_FP_EXC_RES> for "
"floating-point inexact result, B<PR_FP_EXC_INV> for floating-point invalid "
"operation, B<PR_FP_EXC_DISABLED> for FP exceptions disabled, "
"B<PR_FP_EXC_NONRECOV> for async nonrecoverable exception mode, "
"B<PR_FP_EXC_ASYNC> for async recoverable exception mode, "
"B<PR_FP_EXC_PRECISE> for precise exception mode."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:211
#, no-wrap
msgid "B<PR_GET_FPEXC> (since Linux 2.4.21, 2.5.32, only on PowerPC)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:216
msgid ""
"Return floating-point exception mode, in the location pointed to by I<(int\\ "
"*) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:216
#, no-wrap
msgid "B<PR_SET_KEEPCAPS> (since Linux 2.2.18)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:234
msgid ""
"Set the state of the thread's \"keep capabilities\" flag, which determines "
"whether the threads's permitted capability set is cleared when a change is "
"made to the threads's user IDs such that the threads's real UID, effective "
"UID, and saved set-user-ID all become nonzero when at least one of them "
"previously had the value 0.  By default, the permitted capability set is "
"cleared when such a change is made; setting the \"keep capabilities\" flag "
"prevents it from being cleared.  I<arg2> must be either 0 (permitted "
"capabilities are cleared)  or 1 (permitted capabilities are kept).  (A "
"thread's I<effective> capability set is always cleared when such a "
"credential change is made, regardless of the setting of the \"keep "
"capabilities\" flag.)  The \"keep capabilities\" value will be reset to 0 on "
"subsequent calls to B<execve>(2)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:234
#, no-wrap
msgid "B<PR_GET_KEEPCAPS> (since Linux 2.2.18)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:238
msgid ""
"Return (as the function result) the current state of the calling threads's "
"\"keep capabilities\" flag."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:238
#, no-wrap
msgid "B<PR_SET_NAME> (since Linux 2.6.9)"
msgstr ""

#.  TASK_COMM_LEN in include/linux/sched.h
#. type: Plain text
#: build/C/man2/prctl.2:257
msgid ""
"Set the name of the calling thread, using the value in the location pointed "
"to by I<(char\\ *) arg2>.  The name can be up to 16 bytes long, including "
"the terminating null byte.  (If the length of the string, including the "
"terminating null byte, exceeds 16 bytes, the string is silently truncated.)  "
"This is the same attribute that can be set via B<pthread_setname_np>(3)  and "
"retrieved using B<pthread_getname_np>(3).  The attribute is likewise "
"accessible via I</proc/self/task/[tid]/comm>, where I<tid> is the name of "
"the calling thread."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:257
#, no-wrap
msgid "B<PR_GET_NAME> (since Linux 2.6.11)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:264
msgid ""
"Return the name of the calling thread, in the buffer pointed to by I<(char\\ "
"*) arg2>.  The buffer should allow space for up to 16 bytes; the returned "
"string will be null-terminated."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:264
#, no-wrap
msgid "B<PR_SET_NO_NEW_PRIVS> (since Linux 3.5)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:287
msgid ""
"Set the calling process's I<no_new_privs> bit to the value in I<arg2>.  With "
"I<no_new_privs> set to 1, B<execve>(2)  promises not to grant privileges to "
"do anything that could not have been done without the B<execve>(2)  call "
"(for example, rendering the set-user-ID and set-group-ID permission bits, "
"and file capabilities non-functional).  Once set, this bit cannot be unset.  "
"The setting of this bit is inherited by children created by B<fork>(2)  and "
"B<clone>(2), and preserved across B<execve>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:290
msgid ""
"For more information, see the kernel source file "
"I<Documentation/prctl/no_new_privs.txt>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:290
#, no-wrap
msgid "B<PR_GET_NO_NEW_PRIVS> (since Linux 3.5)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:301
msgid ""
"Return (as the function result) the value of the I<no_new_privs> bit for the "
"current process.  A value of 0 indicates the regular B<execve>(2)  "
"behavior.  A value of 1 indicates B<execve>(2)  will operate in the "
"privilege-restricting mode described above."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:301
#, no-wrap
msgid "B<PR_SET_PDEATHSIG> (since Linux 2.1.57)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:314
msgid ""
"Set the parent process death signal of the calling process to I<arg2> "
"(either a signal value in the range 1..maxsig, or 0 to clear).  This is the "
"signal that the calling process will get when its parent dies.  This value "
"is cleared for the child of a B<fork>(2)  and (since Linux 2.4.36 / 2.6.23)  "
"when executing a set-user-ID or set-group-ID binary.  This value is "
"preserved across B<execve>(2)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:314
#, no-wrap
msgid "B<PR_GET_PDEATHSIG> (since Linux 2.3.15)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:319
msgid ""
"Return the current value of the parent process death signal, in the location "
"pointed to by I<(int\\ *) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:319
#, no-wrap
msgid "B<PR_SET_PTRACER> (since Linux 3.4)"
msgstr ""

#.  commit 2d514487faf188938a4ee4fb3464eeecfbdcf8eb
#.  commit bf06189e4d14641c0148bea16e9dd24943862215
#. type: Plain text
#: build/C/man2/prctl.2:344
msgid ""
"This is meaningful only when the Yama LSM is enabled and in mode 1 "
"(\"restricted ptrace\", visible via I</proc/sys/kernel/yama/ptrace_scope>).  "
"When a \"ptracer process ID\" is passed in I<arg2>, the caller is declaring "
"that the ptracer process can B<ptrace>(2)  the calling process as if it were "
"a direct process ancestor.  Each B<PR_SET_PTRACER> operation replaces the "
"previous \"ptracer process ID\".  Employing B<PR_SET_PTRACER> with I<arg2> "
"set to 0 clears the caller's \"ptracer process ID\".  If I<arg2> is "
"B<PR_SET_PTRACER_ANY>, the ptrace restrictions introduced by Yama are "
"effectively disabled for the calling process."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:347
msgid ""
"For further information, see the kernel source file "
"I<Documentation/security/Yama.txt>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:347
#, no-wrap
msgid "B<PR_SET_SECCOMP> (since Linux 2.6.23)"
msgstr ""

#.  See http://thread.gmane.org/gmane.linux.kernel/542632
#.  [PATCH 0 of 2] seccomp updates
#.  andrea@cpushare.com
#. type: Plain text
#: build/C/man2/prctl.2:358
msgid ""
"Set the secure computing (seccomp) mode for the calling thread, to limit the "
"available system calls.  The more recent B<seccomp>(2)  system call provides "
"a superset of the functionality of B<PR_SET_SECCOMP>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:363
msgid ""
"The seccomp mode is selected via I<arg2>.  (The seccomp constants are "
"defined in I<E<lt>linux/seccomp.hE<gt>>.)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:384
msgid ""
"With I<arg2> set to B<SECCOMP_MODE_STRICT>, the only system calls that the "
"thread is permitted to make are B<read>(2), B<write>(2), B<_exit>(2), and "
"B<sigreturn>(2).  Other system calls result in the delivery of a B<SIGKILL> "
"signal.  Strict secure computing mode is useful for number-crunching "
"applications that may need to execute untrusted byte code, perhaps obtained "
"by reading from a pipe or socket.  This operation is available only if the "
"kernel is configured with B<CONFIG_SECCOMP> enabled."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:399
msgid ""
"With I<arg2> set to B<SECCOMP_MODE_FILTER> (since Linux 3.5), the system "
"calls allowed are defined by a pointer to a Berkeley Packet Filter passed in "
"I<arg3>.  This argument is a pointer to I<struct sock_fprog>; it can be "
"designed to filter arbitrary system calls and system call arguments.  This "
"mode is available only if the kernel is configured with "
"B<CONFIG_SECCOMP_FILTER> enabled."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:414
msgid ""
"If B<SECCOMP_MODE_FILTER> filters permit B<fork>(2), then the seccomp mode "
"is inherited by children created by B<fork>(2); if B<execve>(2)  is "
"permitted, then the seccomp mode is preserved across B<execve>(2).  If the "
"filters permit B<prctl>()  calls, then additional filters can be added; they "
"are run in order until the first non-allow result is seen."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:417
msgid ""
"For further information, see the kernel source file "
"I<Documentation/prctl/seccomp_filter.txt>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:417
#, no-wrap
msgid "B<PR_GET_SECCOMP> (since Linux 2.6.23)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:435
msgid ""
"Return (as the function result)  the secure computing mode of the calling "
"thread.  If the caller is not in secure computing mode, this operation "
"returns 0; if the caller is in strict secure computing mode, then the "
"B<prctl>()  call will cause a B<SIGKILL> signal to be sent to the process.  "
"If the caller is in filter mode, and this system call is allowed by the "
"seccomp filters, it returns 2; otherwise, the process is killed with a "
"B<SIGKILL> signal.  This operation is available only if the kernel is "
"configured with B<CONFIG_SECCOMP> enabled."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:443
msgid ""
"Since Linux 3.8, the I<Seccomp> field of the I</proc/[pid]/status> file "
"provides a method of obtaining the same information, without the risk that "
"the process is killed; see B<proc>(5)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:443
#, no-wrap
msgid "B<PR_SET_SECUREBITS> (since Linux 2.6.26)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:449
msgid ""
"Set the \"securebits\" flags of the calling thread to the value supplied in "
"I<arg2>.  See B<capabilities>(7)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:449
#, no-wrap
msgid "B<PR_GET_SECUREBITS> (since Linux 2.6.26)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:455
msgid ""
"Return (as the function result)  the \"securebits\" flags of the calling "
"thread.  See B<capabilities>(7)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:455
#, no-wrap
msgid "B<PR_SET_THP_DISABLE> (since Linux 3.15)"
msgstr ""

#.  commit a0715cc22601e8830ace98366c0c2bd8da52af52
#. type: Plain text
#: build/C/man2/prctl.2:471
msgid ""
"Set the state of the \"THP disable\" flag for the calling thread.  If "
"I<arg2> has a nonzero value, the flag is set, otherwise it is cleared.  "
"Setting this flag provides a method for disabling transparent huge pages for "
"jobs where the code cannot be modified, and using a malloc hook with "
"B<madvise>(2)  is not an option (i.e., statically allocated data).  The "
"setting of the \"THP disable\" flag is inherited by a child created via "
"B<fork>(2)  and is preserved across B<execve>(2)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:471
#, no-wrap
msgid "B<PR_GET_THP_DISABLE> (since Linux 3.15)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:476
msgid ""
"Return (via the function result) the current setting of the \"THP disable\" "
"flag for the calling thread: either 1, if the flag is set, or 0, if it is "
"not."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:476
#, no-wrap
msgid "B<PR_GET_TID_ADDRESS> (since Linux 3.5)"
msgstr ""

#.  commit 300f786b2683f8bb1ec0afb6e1851183a479c86d
#. type: Plain text
#: build/C/man2/prctl.2:491
msgid ""
"Retrieve the I<clear_child_tid> address set by B<set_tid_address>(2)  and "
"the B<clone>(2)  B<CLONE_CHILD_CLEARTID> flag, in the location pointed to by "
"I<(int\\ **)\\ arg2>.  This feature is available only if the kernel is built "
"with the B<CONFIG_CHECKPOINT_RESTORE> option enabled."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:491
#, no-wrap
msgid "B<PR_SET_TIMERSLACK> (since Linux 2.6.28)"
msgstr ""

#.  See https://lwn.net/Articles/369549/
#.  commit 6976675d94042fbd446231d1bd8b7de71a980ada
#.  It seems that it's not possible to set the timer slack to zero;
#.  The minimum value is 1? Seems a little strange.
#. type: Plain text
#: build/C/man2/prctl.2:510
msgid ""
"Set the current timer slack for the calling thread to the nanosecond value "
"supplied in I<arg2>.  If I<arg2> is less than or equal to zero, reset the "
"current timer slack to the thread's default timer slack value.  The timer "
"slack is used by the kernel to group timer expirations for the calling "
"thread that are close to one another; as a consequence, timer expirations "
"for the thread may be up to the specified number of nanoseconds late (but "
"will never expire early).  Grouping timer expirations can help reduce system "
"power consumption by minimizing CPU wake-ups."
msgstr ""

#.  List obtained by grepping for futex usage in glibc source
#. type: Plain text
#: build/C/man2/prctl.2:530
msgid ""
"The timer expirations affected by timer slack are those set by B<select>(2), "
"B<pselect>(2), B<poll>(2), B<ppoll>(2), B<epoll_wait>(2), B<epoll_pwait>(2), "
"B<clock_nanosleep>(2), B<nanosleep>(2), and B<futex>(2)  (and thus the "
"library functions implemented via futexes, including "
"B<pthread_cond_timedwait>(3), B<pthread_mutex_timedlock>(3), "
"B<pthread_rwlock_timedrdlock>(3), B<pthread_rwlock_timedwrlock>(3), and "
"B<sem_timedwait>(3))."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:534
msgid ""
"Timer slack is not applied to threads that are scheduled under a real-time "
"scheduling policy (see B<sched_setscheduler>(2))."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:551
msgid ""
"Each thread has two associated timer slack values: a \"default\" value, and "
"a \"current\" value.  The current value is the one that governs grouping of "
"timer expirations.  When a new thread is created, the two timer slack values "
"are made the same as the current value of the creating thread.  Thereafter, "
"a thread can adjust its current timer slack value via B<PR_SET_TIMERSLACK> "
"(the default value can't be changed).  The timer slack values of I<init> "
"(PID 1), the ancestor of all processes, are 50,000 nanoseconds (50 "
"microseconds).  The timer slack values are preserved across B<execve>(2)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:551
#, no-wrap
msgid "B<PR_GET_TIMERSLACK> (since Linux 2.6.28)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:555
msgid ""
"Return (as the function result)  the current timer slack value of the "
"calling thread."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:555
#, no-wrap
msgid "B<PR_SET_TIMING> (since Linux 2.6.0-test4)"
msgstr ""

#.  0
#.  1
#.  PR_TIMING_TIMESTAMP doesn't do anything in 2.6.26-rc8,
#.  and looking at the patch history, it appears
#.  that it never did anything.
#. type: Plain text
#: build/C/man2/prctl.2:572
msgid ""
"Set whether to use (normal, traditional) statistical process timing or "
"accurate timestamp-based process timing, by passing B<PR_TIMING_STATISTICAL> "
"or B<PR_TIMING_TIMESTAMP> to I<arg2>.  B<PR_TIMING_TIMESTAMP> is not "
"currently implemented (attempting to set this mode will yield the error "
"B<EINVAL>)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:572
#, no-wrap
msgid "B<PR_GET_TIMING> (since Linux 2.6.0-test4)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:576
msgid ""
"Return (as the function result) which process timing method is currently in "
"use."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:576
#, no-wrap
msgid "B<PR_TASK_PERF_EVENTS_DISABLE> (since Linux 2.6.31)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:585
msgid ""
"Disable all performance counters attached to the calling process, regardless "
"of whether the counters were created by this process or another process.  "
"Performance counters created by the calling process for other processes are "
"unaffected.  For more information on performance counters, see the Linux "
"kernel source file I<tools/perf/design.txt>."
msgstr ""

#.  commit 1d1c7ddbfab358445a542715551301b7fc363e28
#. type: Plain text
#: build/C/man2/prctl.2:591
msgid ""
"Originally called B<PR_TASK_PERF_COUNTERS_DISABLE>; renamed (with same "
"numerical value)  in Linux 2.6.32."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:591
#, no-wrap
msgid "B<PR_TASK_PERF_EVENTS_ENABLE> (since Linux 2.6.31)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:596
msgid ""
"The converse of B<PR_TASK_PERF_EVENTS_DISABLE>; enable performance counters "
"attached to the calling process."
msgstr ""

#.  commit 1d1c7ddbfab358445a542715551301b7fc363e28
#.  commit cdd6c482c9ff9c55475ee7392ec8f672eddb7be6
#. type: Plain text
#: build/C/man2/prctl.2:603
msgid "Originally called B<PR_TASK_PERF_COUNTERS_ENABLE>; renamed in Linux 2.6.32."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:603
#, no-wrap
msgid "B<PR_SET_TSC> (since Linux 2.6.26, x86 only)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:616
msgid ""
"Set the state of the flag determining whether the timestamp counter can be "
"read by the process.  Pass B<PR_TSC_ENABLE> to I<arg2> to allow it to be "
"read, or B<PR_TSC_SIGSEGV> to generate a B<SIGSEGV> when the process tries "
"to read the timestamp counter."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:616
#, no-wrap
msgid "B<PR_GET_TSC> (since Linux 2.6.26, x86 only)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:622
msgid ""
"Return the state of the flag determining whether the timestamp counter can "
"be read, in the location pointed to by I<(int\\ *) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:622
#, no-wrap
msgid "B<PR_SET_UNALIGN>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:632
msgid ""
"(Only on: ia64, since Linux 2.3.48; parisc, since Linux 2.6.15; PowerPC, "
"since Linux 2.6.18; Alpha, since Linux 2.6.22)  Set unaligned access control "
"bits to I<arg2>.  Pass B<PR_UNALIGN_NOPRINT> to silently fix up unaligned "
"user accesses, or B<PR_UNALIGN_SIGBUS> to generate B<SIGBUS> on unaligned "
"user access."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:632
#, no-wrap
msgid "B<PR_GET_UNALIGN>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:639
msgid ""
"(see B<PR_SET_UNALIGN> for information on versions and architectures)  "
"Return unaligned access control bits, in the location pointed to by I<(int\\ "
"*) arg2>."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:639
#, no-wrap
msgid "B<PR_MCE_KILL> (since Linux 2.6.32)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:679
msgid ""
"Set the machine check memory corruption kill policy for the current thread.  "
"If I<arg2> is B<PR_MCE_KILL_CLEAR>, clear the thread memory corruption kill "
"policy and use the system-wide default.  (The system-wide default is defined "
"by I</proc/sys/vm/memory_failure_early_kill>; see B<proc>(5).)  If I<arg2> "
"is B<PR_MCE_KILL_SET>, use a thread-specific memory corruption kill policy.  "
"In this case, I<arg3> defines whether the policy is I<early kill> "
"(B<PR_MCE_KILL_EARLY>), I<late kill> (B<PR_MCE_KILL_LATE>), or the "
"system-wide default (B<PR_MCE_KILL_DEFAULT>).  Early kill means that the "
"thread receives a B<SIGBUS> signal as soon as hardware memory corruption is "
"detected inside its address space.  In late kill mode, the process is killed "
"only when it accesses a corrupted page.  See B<sigaction>(2)  for more "
"information on the B<SIGBUS> signal.  The policy is inherited by children.  "
"The remaining unused B<prctl>()  arguments must be zero for future "
"compatibility."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:679
#, no-wrap
msgid "B<PR_MCE_KILL_GET> (since Linux 2.6.32)"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:685
msgid ""
"Return the current per-process machine check kill policy.  All unused "
"B<prctl>()  arguments must be zero."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:685
#, no-wrap
msgid "B<PR_SET_MM> (since Linux 3.3)"
msgstr ""

#.  commit 028ee4be34a09a6d48bdf30ab991ae933a7bc036
#. type: Plain text
#: build/C/man2/prctl.2:706
msgid ""
"Modify certain kernel memory map descriptor fields of the calling process.  "
"Usually these fields are set by the kernel and dynamic loader (see "
"B<ld.so>(8)  for more information) and a regular application should not use "
"this feature.  However, there are cases, such as self-modifying programs, "
"where a program might find it useful to change its own memory map.  This "
"feature is available only if the kernel is built with the "
"B<CONFIG_CHECKPOINT_RESTORE> option enabled.  The calling process must have "
"the B<CAP_SYS_RESOURCE> capability.  The value in I<arg2> is one of the "
"options below, while I<arg3> provides a new value for the option."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:707
#, no-wrap
msgid "B<PR_SET_MM_START_CODE>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:716
msgid ""
"Set the address above which the program text can run.  The corresponding "
"memory area must be readable and executable, but not writable or sharable "
"(see B<mprotect>(2)  and B<mmap>(2)  for more information)."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:716
#, no-wrap
msgid "B<PR_SET_MM_END_CODE>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:721
msgid ""
"Set the address below which the program text can run.  The corresponding "
"memory area must be readable and executable, but not writable or sharable."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:721
#, no-wrap
msgid "B<PR_SET_MM_START_DATA>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:727
msgid ""
"Set the address above which initialized and uninitialized (bss) data are "
"placed.  The corresponding memory area must be readable and writable, but "
"not executable or sharable."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:727
#, no-wrap
msgid "B<PR_SET_MM_END_DATA>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:733
msgid ""
"Set the address below which initialized and uninitialized (bss) data are "
"placed.  The corresponding memory area must be readable and writable, but "
"not executable or sharable."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:733
#, no-wrap
msgid "B<PR_SET_MM_START_STACK>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:737
msgid ""
"Set the start address of the stack.  The corresponding memory area must be "
"readable and writable."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:737
#, no-wrap
msgid "B<PR_SET_MM_START_BRK>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:749
msgid ""
"Set the address above which the program heap can be expanded with B<brk>(2)  "
"call.  The address must be greater than the ending address of the current "
"program data segment.  In addition, the combined size of the resulting heap "
"and the size of the data segment can't exceed the B<RLIMIT_DATA> resource "
"limit (see B<setrlimit>(2))."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:749
#, no-wrap
msgid "B<PR_SET_MM_BRK>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:757
msgid ""
"Set the current B<brk>(2)  value.  The requirements for the address are the "
"same as for the B<PR_SET_MM_START_BRK> option."
msgstr ""

#.  commit fe8c7f5cbf91124987106faa3bdf0c8b955c4cf7
#. type: Plain text
#: build/C/man2/prctl.2:760
msgid "The following options are available since Linux 3.5."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:760
#, no-wrap
msgid "B<PR_SET_MM_ARG_START>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:763
msgid "Set the address above which the program command line is placed."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:763
#, no-wrap
msgid "B<PR_SET_MM_ARG_END>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:766
msgid "Set the address below which the program command line is placed."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:766
#, no-wrap
msgid "B<PR_SET_MM_ENV_START>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:769
msgid "Set the address above which the program environment is placed."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:769
#, no-wrap
msgid "B<PR_SET_MM_ENV_END>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:772
msgid "Set the address below which the program environment is placed."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:785
msgid ""
"The address passed with B<PR_SET_MM_ARG_START>, B<PR_SET_MM_ARG_END>, "
"B<PR_SET_MM_ENV_START>, and B<PR_SET_MM_ENV_END> should belong to a process "
"stack area.  Thus, the corresponding memory area must be readable, writable, "
"and (depending on the kernel configuration) have the B<MAP_GROWSDOWN> "
"attribute set (see B<mmap>(2))."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:785
#, no-wrap
msgid "B<PR_SET_MM_AUXV>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:794
msgid ""
"Set a new auxiliary vector.  The I<arg3> argument should provide the address "
"of the vector.  The I<arg4> is the size of the vector."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:794
#, no-wrap
msgid "B<PR_SET_MM_EXE_FILE>"
msgstr ""

#.  commit b32dfe377102ce668775f8b6b1461f7ad428f8b6
#. type: Plain text
#: build/C/man2/prctl.2:806
msgid ""
"Supersede the I</proc/pid/exe> symbolic link with a new one pointing to a "
"new executable file identified by the file descriptor provided in I<arg3> "
"argument.  The file descriptor should be obtained with a regular B<open>(2)  "
"call."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:813
msgid ""
"To change the symbolic link, one needs to unmap all existing executable "
"memory areas, including those created by the kernel itself (for example the "
"kernel usually creates at least one executable memory area for the ELF "
"I<.text> section)."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:819
msgid ""
"The second limitation is that such transitions can be done only once in a "
"process life time.  Any further attempts will be rejected.  This should help "
"system administrators monitor unusual symbolic-link transitions over all "
"processes running on a system."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:820
#, no-wrap
msgid "B<PR_MPX_ENABLE_MANAGEMENT>, B<PR_MPX_DISABLE_MANAGEMENT> (since Linux 3.19) "
msgstr ""

#.  commit fe3d197f84319d3bce379a9c0dc17b1f48ad358c
#.  See also http://lwn.net/Articles/582712/
#.  See also https://gcc.gnu.org/wiki/Intel%20MPX%20support%20in%20the%20GCC%20compiler
#.  commit e9d1b4f3c60997fe197bf0243cb4a41a44387a88
#. type: Plain text
#: build/C/man2/prctl.2:835
msgid ""
"Enable or disable kernel management of Memory Protection eXtensions (MPX)  "
"bounds tables.  The I<arg2>, I<arg3>, I<arg4>, and I<arg5> arguments must be "
"zero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:848
msgid ""
"MPX is a hardware-assisted mechanism for performing bounds checking on "
"pointers.  It consists of a set of registers storing bounds information and "
"a set of special instruction prefixes that tell the CPU on which "
"instructions it should do bounds enforcement.  There is a limited number of "
"these registers and when there are more pointers than registers, their "
"contents must be \"spilled\" into a set of tables.  These tables are called "
"\"bounds tables\" and the MPX B<prctl>()  operations control whether the "
"kernel manages their allocation and freeing."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:858
msgid ""
"When management is enabled, the kernel will take over allocation and freeing "
"of the bounds tables.  It does this by trapping the #BR exceptions that "
"result at first use of missing bounds tables and instead of delivering the "
"exception to user space, it allocates the table and populates the bounds "
"directory with the location of the new table.  For freeing, the kernel "
"checks to see if bounds tables are present for memory which is not "
"allocated, and frees them if so."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:865
msgid ""
"Before enabling MPX management using B<PR_MPX_ENABLE_MANAGEMENT>, the "
"application must first have allocated a user-space buffer for the bounds "
"directory and placed the location of that directory in the I<bndcfgu> "
"register."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:872
msgid ""
"These calls will fail if the CPU or kernel does not support MPX.  Kernel "
"support for MPX is enabled via the B<CONFIG_X86_INTEL_MPX> configuration "
"option.  You can check whether the CPU supports MPX by looking for the 'mpx' "
"CPUID bit, like with the following command:"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:874
msgid "  cat /proc/cpuinfo | grep ' mpx '"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:877
msgid ""
"A thread may not switch in or out of long (64-bit) mode while MPX is "
"enabled."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:879
msgid "All threads in a process are affected by these calls."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:888
msgid ""
"The child of a B<fork>(2)  inherits the state of MPX management.  During "
"B<execve>(2), MPX management is reset to a state as if "
"B<PR_MPX_DISABLE_MANAGEMENT> had been called."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:892
msgid ""
"For further information on Intel MPX, see the kernel source file "
"I<Documentation/x86/intel_mpx.txt>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:912
msgid ""
"On success, B<PR_GET_DUMPABLE>, B<PR_GET_KEEPCAPS>, B<PR_GET_NO_NEW_PRIVS>, "
"B<PR_GET_THP_DISABLE>, B<PR_CAPBSET_READ>, B<PR_GET_TIMING>, "
"B<PR_GET_TIMERSLACK>, B<PR_GET_SECUREBITS>, B<PR_MCE_KILL_GET>, and (if it "
"returns)  B<PR_GET_SECCOMP> return the nonnegative values described above.  "
"All other I<option> values return 0 on success.  On error, -1 is returned, "
"and I<errno> is set appropriately."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:917
msgid "I<arg2> is an invalid address."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:930
msgid ""
"I<option> is B<PR_SET_SECCOMP>, I<arg2> is B<SECCOMP_MODE_FILTER>, the "
"system was built with B<CONFIG_SECCOMP_FILTER>, and I<arg3> is an invalid "
"address."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:935
msgid "The value of I<option> is not recognized."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:947
msgid ""
"I<option> is B<PR_MCE_KILL> or B<PR_MCE_KILL_GET> or B<PR_SET_MM>, and "
"unused B<prctl>()  arguments were not specified as zero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:952
msgid "I<arg2> is not valid value for this I<option>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:961
msgid ""
"I<option> is B<PR_SET_SECCOMP> or B<PR_GET_SECCOMP>, and the kernel was not "
"configured with B<CONFIG_SECCOMP>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:971
msgid ""
"I<option> is B<PR_SET_SECCOMP>, I<arg2> is B<SECCOMP_MODE_FILTER>, and the "
"kernel was not configured with B<CONFIG_SECCOMP_FILTER>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:977
msgid "I<option> is B<PR_SET_MM>, and one of the following is true"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:983
msgid "I<arg4> or I<arg5> is nonzero;"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:988
msgid ""
"I<arg3> is greater than B<TASK_SIZE> (the limit on the size of the user "
"address space for this architecture);"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:998
msgid ""
"I<arg2> is B<PR_SET_MM_START_CODE>, B<PR_SET_MM_END_CODE>, "
"B<PR_SET_MM_START_DATA>, B<PR_SET_MM_END_DATA>, or B<PR_SET_MM_START_STACK>, "
"and the permissions of the corresponding memory area are not as required;"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1010
msgid ""
"I<arg2> is B<PR_SET_MM_START_BRK> or B<PR_SET_MM_BRK>, and I<arg3> is less "
"than or equal to the end of the data segment or specifies a value that would "
"cause the B<RLIMIT_DATA> resource limit to be exceeded."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1021
msgid ""
"I<option> is B<PR_SET_PTRACER> and I<arg2> is not 0, B<PR_SET_PTRACER_ANY>, "
"or the PID of an existing process."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1029
msgid "I<option> is B<PR_SET_PDEATHSIG> and I<arg2> is not a valid signal number."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1040
msgid ""
"I<option> is B<PR_SET_DUMPABLE> and I<arg2> is neither B<SUID_DUMP_DISABLE> "
"nor B<SUID_DUMP_USER>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1049
msgid "I<option> is B<PR_SET_TIMING> and I<arg2> is not B<PR_TIMING_STATISTICAL>."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1063
msgid ""
"I<option> is B<PR_SET_NO_NEW_PRIVS> and I<arg2> is not equal to 1 or "
"I<arg3>, I<arg4>, or I<arg5> is nonzero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1075
msgid ""
"I<option> is B<PR_GET_NO_NEW_PRIVS> and I<arg2>, I<arg3>, I<arg4>, or "
"I<arg5> is nonzero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1086
msgid ""
"I<option> is B<PR_SET_THP_DISABLE> and I<arg3>, I<arg4>, or I<arg5> is "
"nonzero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1098
msgid ""
"I<option> is B<PR_GET_THP_DISABLE> and I<arg2>, I<arg3>, I<arg4>, or I<arg5> "
"is nonzero."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1110
msgid ""
"I<option> is B<PR_SET_SECUREBITS>, and the caller does not have the "
"B<CAP_SETPCAP> capability, or tried to unset a \"locked\" flag, or tried to "
"set a flag whose corresponding locked flag was set (see B<capabilities>(7))."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1120
msgid ""
"I<option> is B<PR_SET_KEEPCAPS>, and the callers's "
"B<SECURE_KEEP_CAPS_LOCKED> flag is set (see B<capabilities>(7))."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1128
msgid ""
"I<option> is B<PR_CAPBSET_DROP>, and the caller does not have the "
"B<CAP_SETPCAP> capability."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1136
msgid ""
"I<option> is B<PR_SET_MM>, and the caller does not have the "
"B<CAP_SYS_RESOURCE> capability."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:1136
#, no-wrap
msgid "B<EACCES>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1146
msgid ""
"I<option> is B<PR_SET_MM>, and I<arg3> is B<PR_SET_MM_EXE_FILE>, the file is "
"not executable."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:1146
#, no-wrap
msgid "B<EBUSY>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1157
msgid ""
"I<option> is B<PR_SET_MM>, I<arg3> is B<PR_SET_MM_EXE_FILE>, and this the "
"second attempt to change the I</proc/pid/exe> symbolic link, which is "
"prohibited."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:1157 build/C/man2/signalfd.2:266 build/C/man2/timerfd_create.2:345
#, no-wrap
msgid "B<EBADF>"
msgstr ""

#.  The following can't actually happen, because prctl() in
#.  seccomp mode will cause SIGKILL.
#.  .TP
#.  .B EPERM
#.  .I option
#.  is
#.  .BR PR_SET_SECCOMP ,
#.  and secure computing mode is already 1.
#. type: Plain text
#: build/C/man2/prctl.2:1176
msgid ""
"I<option> is B<PR_SET_MM>, I<arg3> is B<PR_SET_MM_EXE_FILE>, and the file "
"descriptor passed in I<arg4> is not valid."
msgstr ""

#. type: TP
#: build/C/man2/prctl.2:1176
#, no-wrap
msgid "B<ENXIO>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1185
msgid ""
"I<option> was B<PR_MPX_ENABLE_MANAGEMENT> or B<PR_MPX_DISABLE_MANAGEMENT> "
"and the kernel or the CPU does not support MPX management.  Check that the "
"kernel and processor have MPX support."
msgstr ""

#.  The library interface was added in glibc 2.0.6
#. type: Plain text
#: build/C/man2/prctl.2:1190
msgid "The B<prctl>()  system call was introduced in Linux 2.1.57."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1197
msgid ""
"This call is Linux-specific.  IRIX has a B<prctl>()  system call (also "
"introduced in Linux 2.1.44 as irix_prctl on the MIPS architecture), with "
"prototype"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1199
msgid "B<ptrdiff_t prctl(int >I<option>B<, int >I<arg2>B<, int >I<arg3>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1204
msgid ""
"and options to get the maximum number of processes per user, get the maximum "
"number of processors the calling process can use, find out whether a "
"specified process is currently blocked, get or set the maximum stack size, "
"and so on."
msgstr ""

#. type: Plain text
#: build/C/man2/prctl.2:1207
msgid "B<signal>(2), B<core>(5)"
msgstr ""

#. type: TH
#: build/C/man3/profil.3:28
#, no-wrap
msgid "PROFIL"
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:31
msgid "profil - execution time profile"
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:34
#, no-wrap
msgid "B<#include E<lt>unistd.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:37
#, no-wrap
msgid ""
"B<int profil(unsigned short *>I<buf>B<, size_t >I<bufsiz>B<,>\n"
"B<           size_t >I<offset>B<, unsigned int >I<scale>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:46
msgid "B<profil>(): _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE\\ E<lt>\\ 500)"
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:68
msgid ""
"This routine provides a means to find out in what areas your program spends "
"most of its time.  The argument I<buf> points to I<bufsiz> bytes of core.  "
"Every virtual 10 milliseconds, the user's program counter (PC)  is examined: "
"I<offset> is subtracted and the result is multiplied by I<scale> and divided "
"by 65536.  If the resulting value is less than I<bufsiz>, then the "
"corresponding entry in I<buf> is incremented.  If I<buf> is NULL, profiling "
"is disabled."
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:70
msgid "Zero is always returned."
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:72
msgid "Similar to a call in SVr4 (but not POSIX.1-2001)."
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:78
msgid ""
"B<profil>()  cannot be used on a program that also uses B<ITIMER_PROF> "
"interval timers (see B<setitimer>(2))."
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:81
msgid ""
"True kernel profiling provides more accurate results.  Libc 4.4 contained a "
"kernel patch providing a system call profil."
msgstr ""

#. type: Plain text
#: build/C/man3/profil.3:87
msgid "B<gprof>(1), B<sprof>(1), B<setitimer>(2), B<sigaction>(2), B<signal>(2)"
msgstr ""

#. type: TH
#: build/C/man3/psignal.3:30
#, no-wrap
msgid "PSIGNAL"
msgstr ""

#. type: TH
#: build/C/man3/psignal.3:30
#, no-wrap
msgid "2010-10-06"
msgstr ""

#. type: TH
#: build/C/man3/psignal.3:30 build/C/man3/raise.3:29 build/C/man7/sigevent.7:26
#, no-wrap
msgid "GNU"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:33
msgid "psignal, psiginfo - print signal message"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:39
#, no-wrap
msgid ""
"B<void psignal(int >I<sig>B<, const char *>I<s>B<);>\n"
"B<void psiginfo(const siginfo_t *>I<pinfo>B<, const char *>I<s>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:41
#, no-wrap
msgid "B<extern const char *const >I<sys_siglist>B<[];>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:50
msgid "B<psignal>(): _SVID_SOURCE || _BSD_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:53
msgid ""
"B<psiginfo>(): _XOPEN_SOURCE\\ E<gt>=\\ 700 || _POSIX_C_SOURCE\\ E<gt>=\\ "
"200809L"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:56
msgid "I<sys_siglist>: _BSD_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:65
msgid ""
"The B<psignal>()  function displays a message on I<stderr> consisting of the "
"string I<s>, a colon, a space, a string describing the signal number I<sig>, "
"and a trailing newline.  If the string I<s> is NULL or empty, the colon and "
"space are omitted.  If I<sig> is invalid, the message displayed will "
"indicate an unknown signal."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:86
msgid ""
"The B<psiginfo>()  function is like B<psignal>(), except that it displays "
"information about the signal described by I<pinfo>, which should point to a "
"valid I<siginfo_t> structure.  As well as the signal description, "
"B<psiginfo>()  displays information about the origin of the signal, and "
"other information relevant to the signal (e.g., the relevant memory address "
"for hardware-generated signals, the child process ID for B<SIGCHLD>, and the "
"user ID and process ID of the sender, for signals set using B<kill>(2)  or "
"B<sigqueue>(3))."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:89
msgid ""
"The array I<sys_siglist> holds the signal description strings indexed by "
"signal number."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:95
msgid "The B<psignal>()  and B<psiginfo>()  functions return no value."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:99
msgid "The B<psiginfo>()  function was added to glibc in version 2.10."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:101
msgid "POSIX.1-2008, 4.3BSD."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:105
msgid "In glibc versions up to 2.12, B<psiginfo>()  had the following bugs:"
msgstr ""

#.  FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12107
#.  Reportedly now fixed; check glibc 2.13
#. type: Plain text
#: build/C/man3/psignal.3:109
msgid "In some circumstances, a trailing newline is not printed."
msgstr ""

#.  FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12108
#.  Reportedly now fixed; check glibc 2.13
#. type: Plain text
#: build/C/man3/psignal.3:113
msgid "Additional details are not displayed for real-time signals."
msgstr ""

#. type: Plain text
#: build/C/man3/psignal.3:118
msgid "B<sigaction>(2), B<perror>(3), B<strsignal>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/raise.3:29
#, no-wrap
msgid "RAISE"
msgstr ""

#. type: TH
#: build/C/man3/raise.3:29
#, no-wrap
msgid "2014-03-10"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:32
msgid "raise - send a signal to the caller"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:37
#, no-wrap
msgid "B<int raise(int >I<sig>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:43
msgid ""
"The B<raise>()  function sends a signal to the calling process or thread.  "
"In a single-threaded program it is equivalent to"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:47
#, no-wrap
msgid "kill(getpid(), sig);\n"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:51
msgid "In a multithreaded program it is equivalent to"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:55
#, no-wrap
msgid "pthread_kill(pthread_self(), sig);\n"
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:61
msgid ""
"If the signal causes a handler to be called, B<raise>()  will return only "
"after the signal handler has returned."
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:64
msgid "B<raise>()  returns 0 on success, and nonzero for failure."
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:69
msgid "The B<raise>()  function is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:71 build/C/man2/signal.2:112
msgid "C89, C99, POSIX.1-2001."
msgstr ""

#.  2.3.2 used the obsolete tkill(), if available.
#. type: Plain text
#: build/C/man3/raise.3:82
msgid ""
"Since version 2.3.3, glibc implements B<raise>()  by calling B<tgkill>(2), "
"if the kernel supports that system call.  Older glibc versions implemented "
"B<raise>()  using B<kill>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/raise.3:89
msgid ""
"B<getpid>(2), B<kill>(2), B<sigaction>(2), B<signal>(2), B<pthread_kill>(3), "
"B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/restart_syscall.2:33
#, no-wrap
msgid "RESTART_SYSCALL"
msgstr ""

#. type: TH
#: build/C/man2/restart_syscall.2:33 build/C/man2/sgetmask.2:26 build/C/man2/sigreturn.2:30 build/C/man3/sigvec.3:26 build/C/man2/tkill.2:29
#, no-wrap
msgid "2014-12-31"
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:36
msgid "restart_syscall - restart a system call after interruption by a stop signal"
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:38
msgid "B<int restart_syscall(void);>"
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:41
msgid "I<Note>: There is no glibc wrapper for this system call; see NOTES."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:53
msgid ""
"The B<restart_syscall>()  system call is used to restart certain system "
"calls after a process that was stopped by a signal (e.g., B<SIGSTOP> or "
"B<SIGTSTP>)  is later resumed after receiving a B<SIGCONT> signal.  This "
"system call is designed only for internal use by the kernel."
msgstr ""

#.  These system calls correspond to the special internal errno value
#.  ERESTART_RESTARTBLOCK. Each of the system calls has a "restart"
#.  helper function that is invoked by restart_syscall().
#.  Notable (as at Linux 3.17) is that poll() has such a "restart"
#.  function, but ppoll(), select(), and pselect() do not.
#.  This means that the latter system calls do not take account of the
#.  time spent in the stopped state when restarting.
#. type: Plain text
#: build/C/man2/restart_syscall.2:88
msgid ""
"B<restart_syscall>()  is used for restarting only those system calls that, "
"when restarted, should adjust their time-related parameters\\(emnamely "
"B<poll>(2)  (since Linux 2.6.24), B<nanosleep>(2)  (since Linux 2.6), "
"B<clock_nanosleep>(2)  (since Linux 2.6), and B<futex>(2), when employed "
"with the B<FUTEX_WAIT> (since Linux 2.6.22)  and B<FUTEX_WAIT_BITSET> (since "
"Linux 2.6.31)  operations.  B<restart_syscall>()  restarts the interrupted "
"system call with a time argument that is suitably adjusted to account for "
"the time that has already elapsed (including the time where the process was "
"stopped by a signal).  Without the B<restart_syscall>()  mechanism, "
"restarting these system calls would not correctly deduct the already elapsed "
"time when the process continued execution."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:92
msgid ""
"The return value of B<restart_syscall>()  is the return value of whatever "
"system call is being restarted."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:96
msgid ""
"I<errno> is set as per the errors for whatever system call is being "
"restarted by B<restart_syscall>()."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:100
msgid "The B<restart_syscall>()  system call is present since Linux 2.6."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:102
msgid "This system call is Linux-specific."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:106
msgid ""
"There is no glibc wrapper for this system call, because it is intended for "
"use only by the kernel and should never be called by applications."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:128
msgid ""
"The kernel uses B<restart_syscall>()  to ensure that when a system call is "
"restarted after a process has been stopped by a signal and then resumed by "
"B<SIGCONT>, then the time that the process spent in the stopped state is "
"counted against the timeout interval specified in the original system call.  "
"In the case of system calls that take a timeout argument and automatically "
"restart after a stop signal plus B<SIGCONT>, but which do not have the "
"B<restart_syscall>()  mechanism built in, then, after the process resumes "
"execution, the time that the process spent in the stop state is I<not> "
"counted against the timeout value.  Notable examples of system calls that "
"suffer this problem are B<ppoll>(2), B<select>(2), and B<pselect>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/restart_syscall.2:135
msgid ""
"From user space, the operation of B<restart_syscall>()  is largely "
"invisible: to the process that made the system call that is restarted, it "
"appears as though that system call executed and returned in the usual "
"fashion."
msgstr ""

#.  FIXME . ppoll(2), select(2), and pselect(2)
#.      should probably get the restart_syscall() treatment:
#.      If a select() call is suspended by stop-sig+SIGCONT, the time
#.      spent suspended is *not* deducted when the select() is restarted.
#.  FIXME . check whether recvmmsg() handles stop-sig+SIGCONT properly.
#. type: Plain text
#: build/C/man2/restart_syscall.2:144
msgid "B<sigaction>(2), B<sigreturn>(2), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/rt_sigqueueinfo.2:25
#, no-wrap
msgid "RT_SIGQUEUEINFO"
msgstr ""

#. type: TH
#: build/C/man2/rt_sigqueueinfo.2:25
#, no-wrap
msgid "2012-07-13"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:28
msgid "rt_sigqueueinfo, rt_tgsigqueueinfo - queue a signal and data"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:31
#, no-wrap
msgid ""
"B<int rt_sigqueueinfo(pid_t >I<tgid>B<, int >I<sig>B<, siginfo_t "
"*>I<uinfo>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:34
#, no-wrap
msgid ""
"B<int rt_tgsigqueueinfo(pid_t >I<tgid>B<, pid_t >I<tid>B<, int >I<sig>B<,>\n"
"B<                      siginfo_t *>I<uinfo>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:38 build/C/man2/sgetmask.2:36 build/C/man2/tkill.2:41
msgid "I<Note>: There are no glibc wrappers for these system calls; see NOTES."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:50
msgid ""
"The B<rt_sigqueueinfo>()  and B<rt_tgsigqueueinfo>()  system calls are the "
"low-level interfaces used to send a signal plus data to a process or "
"thread.  The receiver of the signal can obtain the accompanying data by "
"establishing a signal handler with the B<sigaction>(2)  B<SA_SIGINFO> flag."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:56
msgid ""
"These system calls are not intended for direct application use; they are "
"provided to allow the implementation of B<sigqueue>(3)  and "
"B<pthread_sigqueue>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:68
msgid ""
"The B<rt_sigqueueinfo>()  system call sends the signal I<sig> to the thread "
"group with the ID I<tgid>.  (The term \"thread group\" is synonymous with "
"\"process\", and I<tid> corresponds to the traditional UNIX process ID.)  "
"The signal will be delivered to an arbitrary member of the thread group "
"(i.e., one of the threads that is not currently blocking the signal)."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:79
msgid ""
"The I<uinfo> argument specifies the data to accompany the signal.  This "
"argument is a pointer to a structure of type I<siginfo_t>, described in "
"B<sigaction>(2)  (and defined by including I<E<lt>sigaction.hE<gt>>).  The "
"caller should set the following fields in this structure:"
msgstr ""

#. type: TP
#: build/C/man2/rt_sigqueueinfo.2:79 build/C/man7/sigevent.7:88 build/C/man2/wait.2:316
#, no-wrap
msgid "I<si_code>"
msgstr ""

#.  tkill(2) or
#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:95
msgid ""
"This must be one of the B<SI_*> codes in the Linux kernel source file "
"I<include/asm-generic/siginfo.h>, with the restriction that the code must be "
"negative (i.e., cannot be B<SI_USER>, which is used by the kernel to "
"indicate a signal sent by B<kill>(2))  and cannot (since Linux 2.6.39) be "
"B<SI_TKILL> (which is used by the kernel to indicate a signal sent using "
"B<tgkill>(2))."
msgstr ""

#. type: TP
#: build/C/man2/rt_sigqueueinfo.2:95 build/C/man2/wait.2:295
#, no-wrap
msgid "I<si_pid>"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:99
msgid "This should be set to a process ID, typically the process ID of the sender."
msgstr ""

#. type: TP
#: build/C/man2/rt_sigqueueinfo.2:99 build/C/man2/wait.2:298
#, no-wrap
msgid "I<si_uid>"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:103
msgid "This should be set to a user ID, typically the real user ID of the sender."
msgstr ""

#. type: TP
#: build/C/man2/rt_sigqueueinfo.2:103 build/C/man7/sigevent.7:96
#, no-wrap
msgid "I<si_value>"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:110
msgid ""
"This field contains the user data to accompany the signal.  For more "
"information, see the description of the last (I<union sigval>)  argument of "
"B<sigqueue>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:117
msgid ""
"Internally, the kernel sets the I<si_signo> field to the value specified in "
"I<sig>, so that the receiver of the signal can also obtain the signal number "
"via that field."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:129
msgid ""
"The B<rt_tgsigqueueinfo>()  system call is like B<rt_sigqueueinfo>(), but "
"sends the signal and data to the single thread specified by the combination "
"of I<tgid>, a thread group ID, and I<tid>, a thread in that thread group."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:134
msgid ""
"On success, these system calls return 0.  On error, they return -1 and "
"I<errno> is set to indicate the error."
msgstr ""

#. type: TP
#: build/C/man2/rt_sigqueueinfo.2:135 build/C/man3/sigqueue.3:92 build/C/man2/sigwaitinfo.2:115 build/C/man2/timer_create.2:178
#, no-wrap
msgid "B<EAGAIN>"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:141 build/C/man3/sigqueue.3:98
msgid ""
"The limit of signals which may be queued has been reached.  (See "
"B<signal>(7)  for further information.)"
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:148
msgid "I<sig>, I<tgid>, or I<tid> was invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:156
msgid ""
"The caller does not have permission to send the signal to the target.  For "
"the required permissions, see B<kill>(2).  Or: I<uinfo-E<gt>si_code> is "
"invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:162
msgid "B<rt_sigqueueinfo>(): No thread group matching I<tgid> was found."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:169
msgid "B<rt_tgsigqueinfo>(): No thread matching I<tgid> and I<tid> was found."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:176
msgid ""
"The B<rt_sigqueueinfo>()  system call was added to Linux in version 2.2.  "
"The B<rt_tgsigqueueinfo>()  system call was added to Linux in version "
"2.6.31."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:178 build/C/man2/sgetmask.2:75 build/C/man2/timerfd_create.2:380
msgid "These system calls are Linux-specific."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:183
msgid ""
"Since these system calls are not intended for application use, there are no "
"glibc wrapper functions; use B<syscall>(2)  in the unlikely case that you "
"want to call them directly."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:188
msgid ""
"As with B<kill>(2), the null signal (0) can be used to check if the "
"specified process or thread exists."
msgstr ""

#. type: Plain text
#: build/C/man2/rt_sigqueueinfo.2:196
msgid ""
"B<kill>(2), B<sigaction>(2), B<sigprocmask>(2), B<tgkill>(2), "
"B<pthread_sigqueue>(3), B<sigqueue>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/s390_runtime_instr.2:25
#, no-wrap
msgid "S390_RUNTIME_INSTR"
msgstr ""

#. type: TH
#: build/C/man2/s390_runtime_instr.2:25
#, no-wrap
msgid "2012-12-17"
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:28
msgid "s390_runtime_instr - enable/disable s390 CPU run-time instrumentation"
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:31
#, no-wrap
msgid "B<#include E<lt>asm/runtime_instr.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:33
#, no-wrap
msgid "B<int s390_runtime_instr(int >I<command>B<, int >I<signum>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:39
msgid ""
"The B<s390_runtime_instr>()  system call starts or stops CPU run-time "
"instrumentation for the calling thread."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:47
msgid ""
"The I<command> argument controls whether run-time instrumentation is started "
"(B<S390_RUNTIME_INSTR_START>, 1) or stopped (B<S390_RUNTIME_INSTR_STOP>, 2) "
"for the calling thread."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:54
msgid ""
"The I<signum> argument specifies the number of a real-time signal.  The "
"real-time signal is sent to the thread if the run-time instrumentation "
"buffer is full or if the run-time-instrumentation-halted interrupt occurred."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:65
msgid ""
"On success, B<s390_runtime_instr>()  returns 0 and enables the thread for "
"run-time instrumentation by assigning the thread a default run-time "
"instrumentation control block.  The caller can then read and modify the "
"control block and start the run-time instrumentation.  On error, -1 is "
"returned and I<errno> is set to one of the error codes listed below."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:73
msgid ""
"The value specified in I<command> is not a valid command or the value "
"specified in I<signum> is not a real-time signal number."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:76
msgid "Allocating memory for the run-time instrumentation control block failed."
msgstr ""

#. type: TP
#: build/C/man2/s390_runtime_instr.2:76
#, no-wrap
msgid "B<EOPNOTSUPP>"
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:79
msgid "The run-time instrumentation facility is not available."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:81
msgid "This system call is available since Linux 3.7."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:84
msgid ""
"This Linux-specific system call is available only on the s390 architecture.  "
"The run-time instrumentation facility is available beginning with System z "
"EC12."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:88
msgid ""
"Glibc does not provide a wrapper for this system call, use B<syscall>(2)  to "
"call it."
msgstr ""

#. type: Plain text
#: build/C/man2/s390_runtime_instr.2:91
msgid "B<syscall>(2), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sgetmask.2:26
#, no-wrap
msgid "SGETMASK"
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:29
msgid "sgetmask, ssetmask - manipulation of signal mask (obsolete)"
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:31
msgid "B<long sgetmask(void);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:33
msgid "B<long ssetmask(long >I<newmask>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:42
msgid ""
"These system calls are obsolete.  I<Do not use them>; use B<sigprocmask>(2)  "
"instead."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:45
msgid "B<sgetmask>()  returns the signal mask of the calling process."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:50
msgid ""
"B<ssetmask>()  sets the signal mask of the calling process to the value "
"given in I<newmask>.  The previous signal mask is returned."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:59
msgid ""
"The signal masks dealt with by these two system calls are plain bit masks "
"(unlike the I<sigset_t> used by B<sigprocmask>(2)); use B<sigmask>(3)  to "
"create and inspect these masks."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:64
msgid ""
"B<sgetmask>()  always successfully returns the signal mask.  B<ssetmask>()  "
"always succeeds, and returns the previous signal mask."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:66
msgid "These system calls always succeed."
msgstr ""

#.  f6187769dae48234f3877df3c4d99294cc2254fa
#. type: Plain text
#: build/C/man2/sgetmask.2:73
msgid ""
"Since Linux 3.16, support for these system calls is optional, depending on "
"whether the kernel was built with the B<CONFIG_SGETMASK_SYSCALL> option."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:79
msgid ""
"Glibc does not provide wrappers for these obsolete system calls; in the "
"unlikely event that you want to call them, use B<syscall>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:82
msgid ""
"These system calls are unaware of signal numbers greater than 31 (i.e., "
"real-time signals)."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:84
msgid "These system calls do not exist on x86-64."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:89
msgid "It is not possible to block B<SIGSTOP> or B<SIGKILL>."
msgstr ""

#. type: Plain text
#: build/C/man2/sgetmask.2:92
msgid "B<sigprocmask>(2), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigaction.2:49
#, no-wrap
msgid "SIGACTION"
msgstr ""

#. type: TH
#: build/C/man2/sigaction.2:49
#, no-wrap
msgid "2015-01-22"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:52
msgid "sigaction - examine and change a signal action"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:58
#, no-wrap
msgid ""
"B<int sigaction(int >I<signum>B<, const struct sigaction *>I<act>B<,>\n"
"B<              struct sigaction *>I<oldact>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:68
msgid ""
"B<sigaction>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || "
"_POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:71
msgid "I<siginfo_t>: _POSIX_C_SOURCE E<gt>= 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:80
msgid ""
"The B<sigaction>()  system call is used to change the action taken by a "
"process on receipt of a specific signal.  (See B<signal>(7)  for an overview "
"of signals.)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:86
msgid ""
"I<signum> specifies the signal and can be any valid signal except B<SIGKILL> "
"and B<SIGSTOP>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:97
msgid ""
"If I<act> is non-NULL, the new action for signal I<signum> is installed from "
"I<act>.  If I<oldact> is non-NULL, the previous action is saved in "
"I<oldact>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:101
msgid "The I<sigaction> structure is defined as something like:"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:111
#, no-wrap
msgid ""
"struct sigaction {\n"
"    void     (*sa_handler)(int);\n"
"    void     (*sa_sigaction)(int, siginfo_t *, void *);\n"
"    sigset_t   sa_mask;\n"
"    int        sa_flags;\n"
"    void     (*sa_restorer)(void);\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:118
msgid ""
"On some architectures a union is involved: do not assign to both "
"I<sa_handler> and I<sa_sigaction>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:127
msgid ""
"The I<sa_restorer> field is not intended for application use.  (POSIX does "
"not specify a I<sa_restorer> field.)  Some further details of purpose of "
"this field can be found in B<sigreturn>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:137
msgid ""
"I<sa_handler> specifies the action to be associated with I<signum> and may "
"be B<SIG_DFL> for the default action, B<SIG_IGN> to ignore this signal, or a "
"pointer to a signal handling function.  This function receives the signal "
"number as its only argument."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:159
msgid ""
"If B<SA_SIGINFO> is specified in I<sa_flags>, then I<sa_sigaction> (instead "
"of I<sa_handler>)  specifies the signal-handling function for I<signum>.  "
"This function receives the signal number as its first argument, a pointer to "
"a I<siginfo_t> as its second argument and a pointer to a I<ucontext_t> (cast "
"to I<void\\ *>) as its third argument.  (Commonly, the handler function "
"doesn't make any use of the third argument.  See B<getcontext>(3)  for "
"further information about I<ucontext_t>.)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:169
msgid ""
"I<sa_mask> specifies a mask of signals which should be blocked (i.e., added "
"to the signal mask of the thread in which the signal handler is invoked)  "
"during execution of the signal handler.  In addition, the signal which "
"triggered the handler will be blocked, unless the B<SA_NODEFER> flag is "
"used."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:173
msgid ""
"I<sa_flags> specifies a set of flags which modify the behavior of the "
"signal.  It is formed by the bitwise OR of zero or more of the following:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:174
#, no-wrap
msgid "B<SA_NOCLDSTOP>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:191
msgid ""
"If I<signum> is B<SIGCHLD>, do not receive notification when child processes "
"stop (i.e., when they receive one of B<SIGSTOP>, B<SIGTSTP>, B<SIGTTIN>, or "
"B<SIGTTOU>)  or resume (i.e., they receive B<SIGCONT>)  (see B<wait>(2)).  "
"This flag is meaningful only when establishing a handler for B<SIGCHLD>."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:191
#, no-wrap
msgid "B<SA_NOCLDWAIT> (since Linux 2.6)"
msgstr ""

#.  To be precise: Linux 2.5.60 -- MTK
#. type: Plain text
#: build/C/man2/sigaction.2:205
msgid ""
"If I<signum> is B<SIGCHLD>, do not transform children into zombies when they "
"terminate.  See also B<waitpid>(2).  This flag is meaningful only when "
"establishing a handler for B<SIGCHLD>, or when setting that signal's "
"disposition to B<SIG_DFL>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:217
msgid ""
"If the B<SA_NOCLDWAIT> flag is set when establishing a handler for "
"B<SIGCHLD>, POSIX.1 leaves it unspecified whether a B<SIGCHLD> signal is "
"generated when a child process terminates.  On Linux, a B<SIGCHLD> signal is "
"generated in this case; on some other implementations, it is not."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:217
#, no-wrap
msgid "B<SA_NODEFER>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:224
msgid ""
"Do not prevent the signal from being received from within its own signal "
"handler.  This flag is meaningful only when establishing a signal handler.  "
"B<SA_NOMASK> is an obsolete, nonstandard synonym for this flag."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:224
#, no-wrap
msgid "B<SA_ONSTACK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:230
msgid ""
"Call the signal handler on an alternate signal stack provided by "
"B<sigaltstack>(2).  If an alternate stack is not available, the default "
"stack will be used.  This flag is meaningful only when establishing a signal "
"handler."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:230
#, no-wrap
msgid "B<SA_RESETHAND>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:236
msgid ""
"Restore the signal action to the default upon entry to the signal handler.  "
"This flag is meaningful only when establishing a signal handler.  "
"B<SA_ONESHOT> is an obsolete, nonstandard synonym for this flag."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:236
#, no-wrap
msgid "B<SA_RESTART>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:244
msgid ""
"Provide behavior compatible with BSD signal semantics by making certain "
"system calls restartable across signals.  This flag is meaningful only when "
"establishing a signal handler.  See B<signal>(7)  for a discussion of system "
"call restarting."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:244
#, no-wrap
msgid "B<SA_RESTORER>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:253
msgid ""
"I<Not intended for application use>.  This flag is used by C libraries to "
"indicate that the I<sa_restorer> field contains the address of a \"signal "
"trampoline\".  See B<sigreturn>(2)  for more details."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:253
#, no-wrap
msgid "B<SA_SIGINFO> (since Linux 2.2)"
msgstr ""

#.  (The
#.  .I sa_sigaction
#.  field was added in Linux 2.1.86.)
#. type: Plain text
#: build/C/man2/sigaction.2:264
msgid ""
"The signal handler takes three arguments, not one.  In this case, "
"I<sa_sigaction> should be set instead of I<sa_handler>.  This flag is "
"meaningful only when establishing a signal handler."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:271
msgid ""
"The I<siginfo_t> argument to I<sa_sigaction> is a struct with the following "
"fields:"
msgstr ""

#.  FIXME
#.  The siginfo_t 'si_trapno' field seems to be used only on SPARC and Alpha;
#.  this page could use a little more detail on its purpose there.
#.  In the kernel: si_tid
#. type: Plain text
#: build/C/man2/sigaction.2:309
#, no-wrap
msgid ""
"siginfo_t {\n"
"    int      si_signo;     /* Signal number */\n"
"    int      si_errno;     /* An errno value */\n"
"    int      si_code;      /* Signal code */\n"
"    int      si_trapno;    /* Trap number that caused\n"
"                              hardware-generated signal\n"
"                              (unused on most architectures) */\n"
"    pid_t    si_pid;       /* Sending process ID */\n"
"    uid_t    si_uid;       /* Real user ID of sending process */\n"
"    int      si_status;    /* Exit value or signal */\n"
"    clock_t  si_utime;     /* User time consumed */\n"
"    clock_t  si_stime;     /* System time consumed */\n"
"    sigval_t si_value;     /* Signal value */\n"
"    int      si_int;       /* POSIX.1b signal */\n"
"    void    *si_ptr;       /* POSIX.1b signal */\n"
"    int      si_overrun;   /* Timer overrun count;\n"
"                              POSIX.1b timers */\n"
"    int      si_timerid;   /* Timer ID; POSIX.1b timers */\n"
"    void    *si_addr;      /* Memory location which caused fault */\n"
"    long     si_band;      /* Band event (was I<int> in\n"
"                              glibc 2.3.2 and earlier) */\n"
"    int      si_fd;        /* File descriptor */\n"
"    short    si_addr_lsb;  /* Least significant bit of address\n"
"                              (since Linux 2.6.32) */\n"
"    void    *si_call_addr; /* Address of system call instruction\n"
"                              (since Linux 3.5) */\n"
"    int      si_syscall;   /* Number of attempted system call\n"
"                              (since Linux 3.5) */\n"
"    unsigned int si_arch;  /* Architecture of attempted system call\n"
"                              (since Linux 3.5) */\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:318
msgid ""
"I<si_signo>, I<si_errno> and I<si_code> are defined for all signals.  "
"(I<si_errno> is generally unused on Linux.)  The rest of the struct may be a "
"union, so that one should read only the fields that are meaningful for the "
"given signal:"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:333
msgid ""
"Signals sent with B<kill>(2)  and B<sigqueue>(3)  fill in I<si_pid> and "
"I<si_uid>.  In addition, signals sent with B<sigqueue>(3)  fill in I<si_int> "
"and I<si_ptr> with the values specified by the sender of the signal; see "
"B<sigqueue>(3)  for more details."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:349
msgid ""
"Signals sent by POSIX.1b timers (since Linux 2.6) fill in I<si_overrun> and "
"I<si_timerid>.  The I<si_timerid> field is an internal ID used by the kernel "
"to identify the timer; it is not the same as the timer ID returned by "
"B<timer_create>(2).  The I<si_overrun> field is the timer overrun count; "
"this is the same information as is obtained by a call to "
"B<timer_getoverrun>(2).  These fields are nonstandard Linux extensions."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:364
msgid ""
"Signals sent for message queue notification (see the description of "
"B<SIGEV_SIGNAL> in B<mq_notify>(3))  fill in I<si_int>/I<si_ptr>, with the "
"I<sigev_value> supplied to B<mq_notify>(3); I<si_pid>, with the process ID "
"of the message sender; and I<si_uid>, with the real user ID of the message "
"sender."
msgstr ""

#.  FIXME .
#.  When si_utime and si_stime where originally implemented, the
#.  measurement unit was HZ, which was the same as clock ticks
#.  (sysconf(_SC_CLK_TCK)).  In 2.6, HZ became configurable, and
#.  was *still* used as the unit to return the info these fields,
#.  with the result that the field values depended on the the
#.  configured HZ.  Of course, the should have been measured in
#.  USER_HZ instead, so that sysconf(_SC_CLK_TCK) could be used to
#.  convert to seconds.  I have a queued patch to fix this:
#.  http://thread.gmane.org/gmane.linux.kernel/698061/ .
#.  This patch made it into 2.6.27.
#.  But note that these fields still don't return the times of
#.  waited-for children (as is done by getrusage() and times()
#.  and wait4()).  Solaris 8 does include child times.
#. type: Plain text
#: build/C/man2/sigaction.2:411
msgid ""
"B<SIGCHLD> fills in I<si_pid>, I<si_uid>, I<si_status>, I<si_utime>, and "
"I<si_stime>, providing information about the child.  The I<si_pid> field is "
"the process ID of the child; I<si_uid> is the child's real user ID.  The "
"I<si_status> field contains the exit status of the child (if I<si_code> is "
"B<CLD_EXITED>), or the signal number that caused the process to change "
"state.  The I<si_utime> and I<si_stime> contain the user and system CPU time "
"used by the child process; these fields do not include the times used by "
"waited-for children (unlike B<getrusage>(2)  and B<times>(2)).  In kernels "
"up to 2.6, and since 2.6.27, these fields report CPU time in units of "
"I<sysconf(_SC_CLK_TCK)>.  In 2.6 kernels before 2.6.27, a bug meant that "
"these fields reported time in units of the (configurable) system jiffy (see "
"B<time>(7))."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:458
msgid ""
"B<SIGILL>, B<SIGFPE>, B<SIGSEGV>, B<SIGBUS>, and B<SIGTRAP> fill in "
"I<si_addr> with the address of the fault.  On some architectures, these "
"signals also fill in the I<si_trapno> field.  Some suberrors of B<SIGBUS>, "
"in particular B<BUS_MCEERR_AO> and B<BUS_MCEERR_AR>, also fill in "
"I<si_addr_lsb>.  This field indicates the least significant bit of the "
"reported address and therefore the extent of the corruption.  For example, "
"if a full page was corrupted, I<si_addr_lsb> contains "
"I<log2(sysconf(_SC_PAGESIZE))>.  When B<SIGTRAP> is delivered in response to "
"a B<ptrace>(2)  event (PTRACE_EVENT_foo), I<si_addr> is not populated, but "
"I<si_pid> and I<si_uid> are populated with the respective process ID and "
"user ID responsible for delivering the trap.  In the case of B<seccomp>(2), "
"the tracee will be shown as delivering the event.  B<BUS_MCEERR_*> and "
"I<si_addr_lsb> are Linux-specific extensions."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:472
msgid ""
"B<SIGIO>/B<SIGPOLL> (the two names are synonyms on Linux)  fills in "
"I<si_band> and I<si_fd>.  The I<si_band> event is a bit mask containing the "
"same values as are filled in the I<revents> field by B<poll>(2).  The "
"I<si_fd> field indicates the file descriptor for which the I/O event "
"occurred."
msgstr ""

#.  commit a0727e8ce513fe6890416da960181ceb10fbfae6
#. type: Plain text
#: build/C/man2/sigaction.2:485
msgid ""
"B<SIGSYS>, generated (since Linux 3.5)  when a seccomp filter returns "
"B<SECCOMP_RET_TRAP>, fills in I<si_call_addr>, I<si_syscall>, I<si_arch>, "
"I<si_errno>, and other fields as described in B<seccomp>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:495
msgid ""
"I<si_code> is a value (not a bit mask) indicating why this signal was sent.  "
"For a B<ptrace>(2)  event, I<si_code> will contain B<SIGTRAP> and have the "
"ptrace event in the high byte:"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:498
#, no-wrap
msgid "    (SIGTRAP | PTRACE_EVENT_foo E<lt>E<lt> 8).\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:504
msgid ""
"For a regular signal, the following list shows the values which can be "
"placed in I<si_code> for any signal, along with reason that the signal was "
"generated."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:505
#, no-wrap
msgid "B<SI_USER>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:508
msgid "B<kill>(2)."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:508
#, no-wrap
msgid "B<SI_KERNEL>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:511
msgid "Sent by the kernel."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:511
#, no-wrap
msgid "B<SI_QUEUE>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:514
msgid "B<sigqueue>(3)."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:514
#, no-wrap
msgid "B<SI_TIMER>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:517
msgid "POSIX timer expired."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:517
#, no-wrap
msgid "B<SI_MESGQ> (since Linux 2.6.6)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:521
msgid "POSIX message queue state changed; see B<mq_notify>(3)."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:521
#, no-wrap
msgid "B<SI_ASYNCIO>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:524
msgid "AIO completed."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:524
#, no-wrap
msgid "B<SI_SIGIO>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:533
msgid ""
"Queued B<SIGIO> (only in kernels up to Linux 2.2; from Linux 2.4 onward "
"B<SIGIO>/B<SIGPOLL> fills in I<si_code> as described below)."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:533
#, no-wrap
msgid "B<SI_TKILL> (since Linux 2.4.19)"
msgstr ""

#.  SI_DETHREAD is defined in 2.6.9 sources, but isn't implemented
#.  It appears to have been an idea that was tried during 2.5.6
#.  through to 2.5.24 and then was backed out.
#. type: Plain text
#: build/C/man2/sigaction.2:541
msgid "B<tkill>(2)  or B<tgkill>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:548
msgid "The following values can be placed in I<si_code> for a B<SIGILL> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:549
#, no-wrap
msgid "B<ILL_ILLOPC>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:552
msgid "Illegal opcode."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:552
#, no-wrap
msgid "B<ILL_ILLOPN>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:555
msgid "Illegal operand."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:555
#, no-wrap
msgid "B<ILL_ILLADR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:558
msgid "Illegal addressing mode."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:558
#, no-wrap
msgid "B<ILL_ILLTRP>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:561
msgid "Illegal trap."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:561
#, no-wrap
msgid "B<ILL_PRVOPC>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:564
msgid "Privileged opcode."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:564
#, no-wrap
msgid "B<ILL_PRVREG>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:567
msgid "Privileged register."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:567
#, no-wrap
msgid "B<ILL_COPROC>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:570
msgid "Coprocessor error."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:570
#, no-wrap
msgid "B<ILL_BADSTK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:573
msgid "Internal stack error."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:580
msgid "The following values can be placed in I<si_code> for a B<SIGFPE> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:581
#, no-wrap
msgid "B<FPE_INTDIV>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:584
msgid "Integer divide by zero."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:584
#, no-wrap
msgid "B<FPE_INTOVF>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:587
msgid "Integer overflow."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:587
#, no-wrap
msgid "B<FPE_FLTDIV>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:590
msgid "Floating-point divide by zero."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:590
#, no-wrap
msgid "B<FPE_FLTOVF>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:593
msgid "Floating-point overflow."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:593
#, no-wrap
msgid "B<FPE_FLTUND>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:596
msgid "Floating-point underflow."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:596
#, no-wrap
msgid "B<FPE_FLTRES>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:599
msgid "Floating-point inexact result."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:599
#, no-wrap
msgid "B<FPE_FLTINV>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:602
msgid "Floating-point invalid operation."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:602
#, no-wrap
msgid "B<FPE_FLTSUB>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:605
msgid "Subscript out of range."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:612
msgid "The following values can be placed in I<si_code> for a B<SIGSEGV> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:613
#, no-wrap
msgid "B<SEGV_MAPERR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:616
msgid "Address not mapped to object."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:616
#, no-wrap
msgid "B<SEGV_ACCERR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:619
msgid "Invalid permissions for mapped object."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:626
msgid "The following values can be placed in I<si_code> for a B<SIGBUS> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:627
#, no-wrap
msgid "B<BUS_ADRALN>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:630
msgid "Invalid address alignment."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:630
#, no-wrap
msgid "B<BUS_ADRERR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:633
msgid "Nonexistent physical address."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:633
#, no-wrap
msgid "B<BUS_OBJERR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:636
msgid "Object-specific hardware error."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:636
#, no-wrap
msgid "B<BUS_MCEERR_AR> (since Linux 2.6.32)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:639
msgid "Hardware memory error consumed on a machine check; action required."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:639
#, no-wrap
msgid "B<BUS_MCEERR_AO> (since Linux 2.6.32)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:642
msgid "Hardware memory error detected in process but not consumed; action optional."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:649
msgid "The following values can be placed in I<si_code> for a B<SIGTRAP> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:650
#, no-wrap
msgid "B<TRAP_BRKPT>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:653
msgid "Process breakpoint."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:653
#, no-wrap
msgid "B<TRAP_TRACE>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:656
msgid "Process trace trap."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:656
#, no-wrap
msgid "B<TRAP_BRANCH> (since Linux 2.4)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:659
msgid "Process taken branch trap."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:659
#, no-wrap
msgid "B<TRAP_HWBKPT> (since Linux 2.4)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:662
msgid "Hardware breakpoint/watchpoint."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:669
msgid "The following values can be placed in I<si_code> for a B<SIGCHLD> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:670
#, no-wrap
msgid "B<CLD_EXITED>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:673
msgid "Child has exited."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:673
#, no-wrap
msgid "B<CLD_KILLED>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:676
msgid "Child was killed."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:676
#, no-wrap
msgid "B<CLD_DUMPED>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:679
msgid "Child terminated abnormally."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:679
#, no-wrap
msgid "B<CLD_TRAPPED>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:682
msgid "Traced child has trapped."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:682
#, no-wrap
msgid "B<CLD_STOPPED>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:685
msgid "Child has stopped."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:685
#, no-wrap
msgid "B<CLD_CONTINUED> (since Linux 2.6.9)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:688
msgid "Stopped child has continued."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:695
msgid ""
"The following values can be placed in I<si_code> for a B<SIGIO>/B<SIGPOLL> "
"signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:696
#, no-wrap
msgid "B<POLL_IN>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:699
msgid "Data input available."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:699
#, no-wrap
msgid "B<POLL_OUT>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:702
msgid "Output buffers available."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:702
#, no-wrap
msgid "B<POLL_MSG>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:705
msgid "Input message available."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:705
#, no-wrap
msgid "B<POLL_ERR>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:708
msgid "I/O error."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:708
#, no-wrap
msgid "B<POLL_PRI>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:711
msgid "High priority input available."
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:711
#, no-wrap
msgid "B<POLL_HUP>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:714
msgid "Device disconnected."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:721
msgid "The following value can be placed in I<si_code> for a B<SIGSYS> signal:"
msgstr ""

#. type: TP
#: build/C/man2/sigaction.2:722
#, no-wrap
msgid "B<SYS_SECCOMP> (since Linux 3.5)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:727
msgid "Triggered by a B<seccomp>(2)  filter rule."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:733
msgid ""
"B<sigaction>()  returns 0 on success; on error, -1 is returned, and I<errno> "
"is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:738
msgid ""
"I<act> or I<oldact> points to memory which is not a valid part of the "
"process address space."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:745
msgid ""
"An invalid signal was specified.  This will also be generated if an attempt "
"is made to change the action for B<SIGKILL> or B<SIGSTOP>, which cannot be "
"caught or ignored."
msgstr ""

#.  SVr4 does not document the EINTR condition.
#. type: Plain text
#: build/C/man2/sigaction.2:748
msgid "POSIX.1-2001, SVr4."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:756 build/C/man7/signal.7:105
msgid ""
"A child created via B<fork>(2)  inherits a copy of its parent's signal "
"dispositions.  During an B<execve>(2), the dispositions of handled signals "
"are reset to the default; the dispositions of ignored signals are left "
"unchanged."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:774 build/C/man2/signal.2:134
msgid ""
"According to POSIX, the behavior of a process is undefined after it ignores "
"a B<SIGFPE>, B<SIGILL>, or B<SIGSEGV> signal that was not generated by "
"B<kill>(2)  or B<raise>(3).  Integer division by zero has undefined result.  "
"On some architectures it will generate a B<SIGFPE> signal.  (Also dividing "
"the most negative integer by -1 may generate B<SIGFPE>.)  Ignoring this "
"signal might lead to an endless loop."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:791
msgid ""
"POSIX.1-1990 disallowed setting the action for B<SIGCHLD> to B<SIG_IGN>.  "
"POSIX.1-2001 allows this possibility, so that ignoring B<SIGCHLD> can be "
"used to prevent the creation of zombies (see B<wait>(2)).  Nevertheless, the "
"historical BSD and System\\ V behaviors for ignoring B<SIGCHLD> differ, so "
"that the only completely portable method of ensuring that terminated "
"children do not become zombies is to catch the B<SIGCHLD> signal and perform "
"a B<wait>(2)  or similar."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:804
msgid ""
"POSIX.1-1990 specified only B<SA_NOCLDSTOP>.  POSIX.1-2001 added "
"B<SA_NOCLDWAIT>, B<SA_RESETHAND>, B<SA_NODEFER>, and B<SA_SIGINFO>.  Use of "
"these latter values in I<sa_flags> may be less portable in applications "
"intended for older UNIX implementations."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:808
msgid "The B<SA_RESETHAND> flag is compatible with the SVr4 flag of the same name."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:818
msgid ""
"The B<SA_NODEFER> flag is compatible with the SVr4 flag of the same name "
"under kernels 1.3.9 and newer.  On older kernels the Linux implementation "
"allowed the receipt of any signal, not just the one we are installing "
"(effectively overriding any I<sa_mask> settings)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:824
msgid ""
"B<sigaction>()  can be called with a NULL second argument to query the "
"current signal handler.  It can also be used to check whether a given signal "
"is valid for the current machine by calling it with NULL second and third "
"arguments."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:830
msgid ""
"It is not possible to block B<SIGKILL> or B<SIGSTOP> (by specifying them in "
"I<sa_mask>).  Attempts to do so are silently ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:834 build/C/man2/sigpending.2:70 build/C/man2/sigprocmask.2:144 build/C/man2/sigsuspend.2:108
msgid "See B<sigsetops>(3)  for details on manipulating signal sets."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:839
msgid ""
"See B<signal>(7)  for a list of the async-signal-safe functions that can be "
"safely called inside from inside a signal handler."
msgstr ""

#. type: SS
#: build/C/man2/sigaction.2:839
#, no-wrap
msgid "Undocumented"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:849
msgid ""
"Before the introduction of B<SA_SIGINFO> it was also possible to get some "
"additional information, namely by using a I<sa_handler> with second argument "
"of type I<struct sigcontext>.  See the relevant Linux kernel sources for "
"details.  This use is obsolete now."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:858
msgid ""
"In kernels up to and including 2.6.13, specifying B<SA_NODEFER> in "
"I<sa_flags> prevents not only the delivered signal from being masked during "
"execution of the handler, but also the signals specified in I<sa_mask>.  "
"This bug was fixed in kernel 2.6.14."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:861
msgid "See B<mprotect>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaction.2:883
msgid ""
"B<kill>(1), B<kill>(2), B<killpg>(2), B<pause>(2), B<restart_syscall>(2), "
"B<seccomp>(2)  B<sigaltstack>(2), B<signal>(2), B<signalfd>(2), "
"B<sigpending>(2), B<sigreturn>(2), B<sigprocmask>(2), B<sigsuspend>(2), "
"B<wait>(2), B<raise>(3), B<siginterrupt>(3), B<sigqueue>(3), "
"B<sigsetops>(3), B<sigvec>(3), B<core>(5), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigaltstack.2:27
#, no-wrap
msgid "SIGALTSTACK"
msgstr ""

#. type: TH
#: build/C/man2/sigaltstack.2:27
#, no-wrap
msgid "2010-09-26"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:30
msgid "sigaltstack - set and/or get signal stack context"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:34
msgid "B<int sigaltstack(const stack_t *>I<ss>B<, stack_t *>I<oss>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:41
msgid "B<sigaltstack>():"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:48 build/C/man3/siginterrupt.3:53 build/C/man2/wait.2:80
msgid "|| /* Since glibc 2.12: */ _POSIX_C_SOURCE\\ E<gt>=\\ 200809L"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:60
msgid ""
"B<sigaltstack>()  allows a process to define a new alternate signal stack "
"and/or retrieve the state of an existing alternate signal stack.  An "
"alternate signal stack is used during the execution of a signal handler if "
"the establishment of that handler (see B<sigaction>(2))  requested it."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:63
msgid ""
"The normal sequence of events for using an alternate signal stack is the "
"following:"
msgstr ""

#. type: IP
#: build/C/man2/sigaltstack.2:63 build/C/man7/signal.7:387
#, no-wrap
msgid "1."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:67
msgid "Allocate an area of memory to be used for the alternate signal stack."
msgstr ""

#. type: IP
#: build/C/man2/sigaltstack.2:67 build/C/man7/signal.7:391
#, no-wrap
msgid "2."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:73
msgid ""
"Use B<sigaltstack>()  to inform the system of the existence and location of "
"the alternate signal stack."
msgstr ""

#. type: IP
#: build/C/man2/sigaltstack.2:73 build/C/man7/signal.7:411
#, no-wrap
msgid "3."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:80
msgid ""
"When establishing a signal handler using B<sigaction>(2), inform the system "
"that the signal handler should be executed on the alternate signal stack by "
"specifying the B<SA_ONSTACK> flag."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:88
msgid ""
"The I<ss> argument is used to specify a new alternate signal stack, while "
"the I<oss> argument is used to retrieve information about the currently "
"established signal stack.  If we are interested in performing just one of "
"these tasks, then the other argument can be specified as NULL.  Each of "
"these arguments is a structure of the following type:"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:96
#, no-wrap
msgid ""
"typedef struct {\n"
"    void  *ss_sp;     /* Base address of stack */\n"
"    int    ss_flags;  /* Flags */\n"
"    size_t ss_size;   /* Number of bytes in stack */\n"
"} stack_t;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:107
msgid ""
"To establish a new alternate signal stack, I<ss.ss_flags> is set to zero, "
"and I<ss.ss_sp> and I<ss.ss_size> specify the starting address and size of "
"the stack.  The constant B<SIGSTKSZ> is defined to be large enough to cover "
"the usual size requirements for an alternate signal stack, and the constant "
"B<MINSIGSTKSZ> defines the minimum size required to execute a signal "
"handler."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:111
msgid ""
"When a signal handler is invoked on the alternate stack, the kernel "
"automatically aligns the address given in I<ss.ss_sp> to a suitable address "
"boundary for the underlying hardware architecture."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:116
msgid ""
"To disable an existing stack, specify I<ss.ss_flags> as B<SS_DISABLE>.  In "
"this case, the remaining fields in I<ss> are ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:124
msgid ""
"If I<oss> is not NULL, then it is used to return information about the "
"alternate signal stack which was in effect prior to the call to "
"B<sigaltstack>().  The I<oss.ss_sp> and I<oss.ss_size> fields return the "
"starting address and size of that stack.  The I<oss.ss_flags> may return "
"either of the following values:"
msgstr ""

#. type: TP
#: build/C/man2/sigaltstack.2:124
#, no-wrap
msgid "B<SS_ONSTACK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:130
msgid ""
"The process is currently executing on the alternate signal stack.  (Note "
"that it is not possible to change the alternate signal stack if the process "
"is currently executing on it.)"
msgstr ""

#. type: TP
#: build/C/man2/sigaltstack.2:130
#, no-wrap
msgid "B<SS_DISABLE>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:133
msgid "The alternate signal stack is currently disabled."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:137
msgid ""
"B<sigaltstack>()  returns 0 on success, or -1 on failure with I<errno> set "
"to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:142
msgid ""
"Either I<ss> or I<oss> is not NULL and points to an area outside of the "
"process's address space."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:147
msgid ""
"I<ss> is not NULL and the I<ss_flags> field contains a nonzero value other "
"than B<SS_DISABLE>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:153
msgid ""
"The specified size of the new alternate signal stack I<ss.ss_size> was less "
"than B<MINSTKSZ>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:158
msgid ""
"An attempt was made to change the alternate signal stack while it was active "
"(i.e., the process was already executing on the current alternate signal "
"stack)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:160
msgid "SUSv2, SVr4, POSIX.1-2001."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:168
msgid ""
"The most common usage of an alternate signal stack is to handle the "
"B<SIGSEGV> signal that is generated if the space available for the normal "
"process stack is exhausted: in this case, a signal handler for B<SIGSEGV> "
"cannot be invoked on the process stack; if we wish to handle it, we must use "
"an alternate signal stack."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:178
msgid ""
"Establishing an alternate signal stack is useful if a process expects that "
"it may exhaust its standard stack.  This may occur, for example, because the "
"stack grows so large that it encounters the upwardly growing heap, or it "
"reaches a limit established by a call to B<setrlimit(RLIMIT_STACK, &rlim)>.  "
"If the standard stack is exhausted, the kernel sends the process a "
"B<SIGSEGV> signal.  In these circumstances the only way to catch this signal "
"is on an alternate signal stack."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:184
msgid ""
"On most hardware architectures supported by Linux, stacks grow downward.  "
"B<sigaltstack>()  automatically takes account of the direction of stack "
"growth."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:193
msgid ""
"Functions called from a signal handler executing on an alternate signal "
"stack will also use the alternate signal stack.  (This also applies to any "
"handlers invoked for other signals while the process is executing on the "
"alternate signal stack.)  Unlike the standard stack, the system does not "
"automatically extend the alternate signal stack.  Exceeding the allocated "
"size of the alternate signal stack will lead to unpredictable results."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:201
msgid ""
"A successful call to B<execve>(2)  removes any existing alternate signal "
"stack.  A child process created via B<fork>(2)  inherits a copy of its "
"parent's alternate signal stack settings."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:210
msgid ""
"B<sigaltstack>()  supersedes the older B<sigstack>()  call.  For backward "
"compatibility, glibc also provides B<sigstack>().  All new applications "
"should be written using B<sigaltstack>()."
msgstr ""

#. type: SS
#: build/C/man2/sigaltstack.2:210 build/C/man3/sigpause.3:66
#, no-wrap
msgid "History"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:217
msgid ""
"4.2BSD had a B<sigstack>()  system call.  It used a slightly different "
"struct, and had the major disadvantage that the caller had to know the "
"direction of stack growth."
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:220
msgid "The following code segment demonstrates the use of B<sigaltstack>():"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:224
#, no-wrap
msgid "stack_t ss;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:232
#, no-wrap
msgid ""
"ss.ss_sp = malloc(SIGSTKSZ);\n"
"if (ss.ss_sp == NULL)\n"
"    /* Handle error */;\n"
"ss.ss_size = SIGSTKSZ;\n"
"ss.ss_flags = 0;\n"
"if (sigaltstack(&ss, NULL) == -1)\n"
"    /* Handle error */;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigaltstack.2:241
msgid ""
"B<execve>(2), B<setrlimit>(2), B<sigaction>(2), B<siglongjmp>(3), "
"B<sigsetjmp>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man7/sigevent.7:26
#, no-wrap
msgid "SIGEVENT"
msgstr ""

#. type: TH
#: build/C/man7/sigevent.7:26
#, no-wrap
msgid "2011-09-09"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:29
msgid "sigevent - structure for notification from asynchronous routines"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:36
#, no-wrap
msgid ""
"union sigval {          /* Data passed with notification */\n"
"    int     sival_int;         /* Integer value */\n"
"    void   *sival_ptr;         /* Pointer value */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:51
#, no-wrap
msgid ""
"struct sigevent {\n"
"    int          sigev_notify; /* Notification method */\n"
"    int          sigev_signo;  /* Notification signal */\n"
"    union sigval sigev_value;  /* Data passed with\n"
"                                  notification */\n"
"    void       (*sigev_notify_function) (union sigval);\n"
"                     /* Function used for thread\n"
"                        notification (SIGEV_THREAD) */\n"
"    void        *sigev_notify_attributes;\n"
"                     /* Attributes for notification thread\n"
"                        (SIGEV_THREAD) */\n"
"    pid_t        sigev_notify_thread_id;\n"
"                     /* ID of thread to signal (SIGEV_THREAD_ID) */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:60
msgid ""
"The I<sigevent> structure is used by various APIs to describe the way a "
"process is to be notified about an event (e.g., completion of an "
"asynchronous request, expiration of a timer, or the arrival of a message)."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:68
msgid ""
"The definition shown in the SYNOPSIS is approximate: some of the fields in "
"the I<sigevent> structure may be defined as part of a union.  Programs "
"should employ only those fields relevant to the value specified in "
"I<sigev_notify>."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:73
msgid ""
"The I<sigev_notify> field specifies how notification is to be performed.  "
"This field can have one of the following values:"
msgstr ""

#. type: TP
#: build/C/man7/sigevent.7:73 build/C/man2/timer_create.2:109
#, no-wrap
msgid "B<SIGEV_NONE>"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:76
msgid "A \"null\" notification: don't do anything when the event occurs."
msgstr ""

#. type: TP
#: build/C/man7/sigevent.7:76 build/C/man2/timer_create.2:114
#, no-wrap
msgid "B<SIGEV_SIGNAL>"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:80
msgid "Notify the process by sending the signal specified in I<sigev_signo>."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:87
msgid ""
"If the signal is caught with a signal handler that was registered using the "
"B<sigaction>(2)  B<SA_SIGINFO> flag, then the following fields are set in "
"the I<siginfo_t> structure that is passed as the second argument of the "
"handler:"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:92
msgid ""
"This field is set to a value that depends on the API delivering the "
"notification."
msgstr ""

#. type: TP
#: build/C/man7/sigevent.7:92 build/C/man2/wait.2:302
#, no-wrap
msgid "I<si_signo>"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:96
msgid ""
"This field is set to the signal number (i.e., the same value as in "
"I<sigev_signo>)."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:100
msgid "This field is set to the value specified in I<sigev_value>."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:105
msgid ""
"Depending on the API, other fields may also be set in the I<siginfo_t> "
"structure."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:108
msgid ""
"The same information is also available if the signal is accepted using "
"B<sigwaitinfo>(2)."
msgstr ""

#. type: TP
#: build/C/man7/sigevent.7:108 build/C/man2/timer_create.2:132
#, no-wrap
msgid "B<SIGEV_THREAD>"
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:125
msgid ""
"Notify the process by invoking I<sigev_notify_function> \"as if\" it were "
"the start function of a new thread.  (Among the implementation possibilities "
"here are that each timer notification could result in the creation of a new "
"thread, or that a single thread is created to receive all notifications.)  "
"The function is invoked with I<sigev_value> as its sole argument.  If "
"I<sigev_notify_attributes> is not NULL, it should point to a "
"I<pthread_attr_t> structure that defines attributes for the new thread (see "
"B<pthread_attr_init>(3))."
msgstr ""

#. type: TP
#: build/C/man7/sigevent.7:125 build/C/man2/timer_create.2:140
#, no-wrap
msgid "B<SIGEV_THREAD_ID> (Linux-specific)"
msgstr ""

#.  | SIGEV_SIGNAL vs not?
#. type: Plain text
#: build/C/man7/sigevent.7:130
msgid "Currently used only by POSIX timers; see B<timer_create>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:132 build/C/man2/sigpending.2:66 build/C/man2/sigprocmask.2:114 build/C/man3/sigqueue.3:121 build/C/man3/sigsetops.3:147 build/C/man2/sigsuspend.2:86 build/C/man3/sigwait.3:87 build/C/man2/sigwaitinfo.2:135 build/C/man2/timer_create.2:197 build/C/man2/timer_delete.2:69 build/C/man2/timer_getoverrun.2:99 build/C/man2/timer_settime.2:209
msgid "POSIX.1-2001."
msgstr ""

#. type: Plain text
#: build/C/man7/sigevent.7:142
msgid ""
"B<timer_create>(2), B<aio_fsync>(3), B<aio_read>(3), B<aio_write>(3), "
"B<getaddrinfo_a>(3), B<lio_listio>(3), B<mq_notify>(3), B<aio>(7), "
"B<pthreads>(7)"
msgstr ""

#. type: TH
#: build/C/man3/siginterrupt.3:31
#, no-wrap
msgid "SIGINTERRUPT"
msgstr ""

#. type: TH
#: build/C/man3/siginterrupt.3:31
#, no-wrap
msgid "2014-06-13"
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:34
msgid "siginterrupt - allow signals to interrupt system calls"
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:39
#, no-wrap
msgid "B<int siginterrupt(int >I<sig>B<, int >I<flag>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:47
msgid "B<siginterrupt>():"
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:64
msgid ""
"The B<siginterrupt>()  function changes the restart behavior when a system "
"call is interrupted by the signal I<sig>.  If the I<flag> argument is false "
"(0), then system calls will be restarted if interrupted by the specified "
"signal I<sig>.  This is the default behavior in Linux."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:69
msgid ""
"If the I<flag> argument is true (1) and no data has been transferred, then a "
"system call interrupted by the signal I<sig> will return -1 and I<errno> "
"will be set to B<EINTR>."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:73
msgid ""
"If the I<flag> argument is true (1) and data transfer has started, then the "
"system call will be interrupted and will return the actual amount of data "
"transferred."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:83
msgid ""
"The B<siginterrupt>()  function returns 0 on success.  It returns -1 if the "
"signal number I<sig> is invalid, with I<errno> set to indicate the cause of "
"the error."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:87
msgid "The specified signal number is invalid."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:93
msgid ""
"The B<siginterrupt>()  function uses a global variable that is not "
"protected, so it is not thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:102
msgid ""
"4.3BSD, POSIX.1-2001.  POSIX.1-2008 marks B<siginterrupt>()  as obsolete, "
"recommending the use of B<sigaction>(2)  with the B<SA_RESTART> flag "
"instead."
msgstr ""

#. type: Plain text
#: build/C/man3/siginterrupt.3:104
msgid "B<signal>(2)"
msgstr ""

#. type: TH
#: build/C/man2/signal.2:36 build/C/man7/signal.7:46
#, no-wrap
msgid "SIGNAL"
msgstr ""

#. type: TH
#: build/C/man2/signal.2:36 build/C/man3/sigpause.3:25 build/C/man2/sigwaitinfo.2:25 build/C/man2/timer_create.2:33 build/C/man2/wait.2:49
#, no-wrap
msgid "2014-08-19"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:39
msgid "signal - ANSI C signal handling"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:45
msgid "B<sighandler_t signal(int >I<signum>B<, sighandler_t >I<handler>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:54
msgid ""
"The behavior of B<signal>()  varies across UNIX versions, and has also "
"varied historically across different versions of Linux.  B<Avoid its use>: "
"use B<sigaction>(2)  instead.  See I<Portability> below."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:64
msgid ""
"B<signal>()  sets the disposition of the signal I<signum> to I<handler>, "
"which is either B<SIG_IGN>, B<SIG_DFL>, or the address of a "
"programmer-defined function (a \"signal handler\")."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:68
msgid ""
"If the signal I<signum> is delivered to the process, then one of the "
"following happens:"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:73
msgid "If the disposition is set to B<SIG_IGN>, then the signal is ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:80
msgid ""
"If the disposition is set to B<SIG_DFL>, then the default action associated "
"with the signal (see B<signal>(7))  occurs."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:91
msgid ""
"If the disposition is set to a function, then first either the disposition "
"is reset to B<SIG_DFL>, or the signal is blocked (see I<Portability> below), "
"and then I<handler> is called with argument I<signum>.  If invocation of the "
"handler caused the signal to be blocked, then the signal is unblocked upon "
"return from the handler."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:97
msgid "The signals B<SIGKILL> and B<SIGSTOP> cannot be caught or ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:105
msgid ""
"B<signal>()  returns the previous value of the signal handler, or B<SIG_ERR> "
"on error.  In the event of an error, I<errno> is set to indicate the cause."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:110
msgid "I<signum> is invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:116
msgid "The effects of B<signal>()  in a multithreaded process are unspecified."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:141
msgid ""
"See B<sigaction>(2)  for details on what happens when B<SIGCHLD> is set to "
"B<SIG_IGN>."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:146
msgid ""
"See B<signal>(7)  for a list of the async-signal-safe functions that can be "
"safely called from inside a signal handler."
msgstr ""

#.  libc4 and libc5 define
#.  .IR SignalHandler ;
#. type: Plain text
#: build/C/man2/signal.2:162
msgid ""
"The use of I<sighandler_t> is a GNU extension, exposed if B<_GNU_SOURCE> is "
"defined; glibc also defines (the BSD-derived)  I<sig_t> if B<_BSD_SOURCE> is "
"defined.  Without use of such a type, the declaration of B<signal>()  is the "
"somewhat harder to read:"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:166
#, no-wrap
msgid ""
"B<void ( *>I<signal>B<(int >I<signum>B<, void (*>I<handler>B<)(int)) ) "
"(int);>\n"
msgstr ""

#. type: SS
#: build/C/man2/signal.2:168
#, no-wrap
msgid "Portability"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:180
msgid ""
"The only portable use of B<signal>()  is to set a signal's disposition to "
"B<SIG_DFL> or B<SIG_IGN>.  The semantics when using B<signal>()  to "
"establish a signal handler vary across systems (and POSIX.1 explicitly "
"permits this variation); B<do not use it for this purpose.>"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:186
msgid ""
"POSIX.1 solved the portability mess by specifying B<sigaction>(2), which "
"provides explicit control of the semantics when a signal handler is invoked; "
"use that interface instead of B<signal>()."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:196
msgid ""
"In the original UNIX systems, when a handler that was established using "
"B<signal>()  was invoked by the delivery of a signal, the disposition of the "
"signal would be reset to B<SIG_DFL>, and the system did not block delivery "
"of further instances of the signal.  This is equivalent to calling "
"B<sigaction>(2)  with the following flags:"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:198
#, no-wrap
msgid "    sa.sa_flags = SA_RESETHAND | SA_NODEFER;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:205
msgid ""
"System\\ V also provides these semantics for B<signal>().  This was bad "
"because the signal might be delivered again before the handler had a chance "
"to reestablish itself.  Furthermore, rapid deliveries of the same signal "
"could result in recursive invocations of the handler."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:220
msgid ""
"BSD improved on this situation, but unfortunately also changed the semantics "
"of the existing B<signal>()  interface while doing so.  On BSD, when a "
"signal handler is invoked, the signal disposition is not reset, and further "
"instances of the signal are blocked from being delivered while the handler "
"is executing.  Furthermore, certain blocking system calls are automatically "
"restarted if interrupted by a signal handler (see B<signal>(7)).  The BSD "
"semantics are equivalent to calling B<sigaction>(2)  with the following "
"flags:"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:222
#, no-wrap
msgid "    sa.sa_flags = SA_RESTART;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:224
msgid "The situation on Linux is as follows:"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:228
msgid "The kernel's B<signal>()  system call provides System\\ V semantics."
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:244
msgid ""
"By default, in glibc 2 and later, the B<signal>()  wrapper function does not "
"invoke the kernel system call.  Instead, it calls B<sigaction>(2)  using "
"flags that supply BSD semantics.  This default behavior is provided as long "
"as the B<_BSD_SOURCE> feature test macro is defined.  By default, "
"B<_BSD_SOURCE> is defined; it is also implicitly defined if one defines "
"B<_GNU_SOURCE>, and can of course be explicitly defined."
msgstr ""

#
#.  System V semantics are also provided if one uses the separate
#.  .BR sysv_signal (3)
#.  function.
#.  .IP *
#.  The
#.  .BR signal ()
#.  function in Linux libc4 and libc5 provide System\ V semantics.
#.  If one on a libc5 system includes
#.  .I <bsd/signal.h>
#.  instead of
#.  .IR <signal.h> ,
#.  then
#.  .BR signal ()
#.  provides BSD semantics.
#. type: Plain text
#: build/C/man2/signal.2:278
msgid ""
"On glibc 2 and later, if the B<_BSD_SOURCE> feature test macro is not "
"defined, then B<signal>()  provides System\\ V semantics.  (The default "
"implicit definition of B<_BSD_SOURCE> is not provided if one invokes "
"B<gcc>(1)  in one of its standard modes (I<-std=xxx> or I<-ansi>)  or "
"defines various other feature test macros such as B<_POSIX_SOURCE>, "
"B<_XOPEN_SOURCE>, or B<_SVID_SOURCE>; see B<feature_test_macros>(7).)"
msgstr ""

#. type: Plain text
#: build/C/man2/signal.2:297
msgid ""
"B<kill>(1), B<alarm>(2), B<kill>(2), B<killpg>(2), B<pause>(2), "
"B<sigaction>(2), B<signalfd>(2), B<sigpending>(2), B<sigprocmask>(2), "
"B<sigsuspend>(2), B<bsd_signal>(3), B<raise>(3), B<siginterrupt>(3), "
"B<sigqueue>(3), B<sigsetops>(3), B<sigvec>(3), B<sysv_signal>(3), "
"B<signal>(7)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:49
msgid "signal - overview of signals"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:52
msgid ""
"Linux supports both POSIX reliable signals (hereinafter \"standard "
"signals\") and POSIX real-time signals."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:52
#, no-wrap
msgid "Signal dispositions"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:57
msgid ""
"Each signal has a current I<disposition>, which determines how the process "
"behaves when it is delivered the signal."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:60
msgid ""
"The entries in the \"Action\" column of the tables below specify the default "
"disposition for each signal, as follows:"
msgstr ""

#. type: IP
#: build/C/man7/signal.7:60
#, no-wrap
msgid "Term"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:62
msgid "Default action is to terminate the process."
msgstr ""

#. type: IP
#: build/C/man7/signal.7:62
#, no-wrap
msgid "Ign"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:64
msgid "Default action is to ignore the signal."
msgstr ""

#. type: IP
#: build/C/man7/signal.7:64
#, no-wrap
msgid "Core"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:67
msgid "Default action is to terminate the process and dump core (see B<core>(5))."
msgstr ""

#. type: IP
#: build/C/man7/signal.7:67
#, no-wrap
msgid "Stop"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:69
msgid "Default action is to stop the process."
msgstr ""

#. type: IP
#: build/C/man7/signal.7:69
#, no-wrap
msgid "Cont"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:71
msgid "Default action is to continue the process if it is currently stopped."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:93
msgid ""
"A process can change the disposition of a signal using B<sigaction>(2)  or "
"B<signal>(2).  (The latter is less portable when establishing a signal "
"handler; see B<signal>(2)  for details.)  Using these system calls, a "
"process can elect one of the following behaviors to occur on delivery of the "
"signal: perform the default action; ignore the signal; or catch the signal "
"with a I<signal handler>, a programmer-defined function that is "
"automatically invoked when the signal is delivered.  (By default, the signal "
"handler is invoked on the normal process stack.  It is possible to arrange "
"that the signal handler uses an alternate stack; see B<sigaltstack>(2)  for "
"a discussion of how to do this and when it might be useful.)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:97
msgid ""
"The signal disposition is a per-process attribute: in a multithreaded "
"application, the disposition of a particular signal is the same for all "
"threads."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:105
#, no-wrap
msgid "Sending a signal"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:108
msgid ""
"The following system calls and library functions allow the caller to send a "
"signal:"
msgstr ""

#. type: TP
#: build/C/man7/signal.7:108
#, no-wrap
msgid "B<raise>(3)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:111
msgid "Sends a signal to the calling thread."
msgstr ""

#. type: TP
#: build/C/man7/signal.7:111
#, no-wrap
msgid "B<kill>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:116
msgid ""
"Sends a signal to a specified process, to all members of a specified process "
"group, or to all processes on the system."
msgstr ""

#. type: TP
#: build/C/man7/signal.7:116
#, no-wrap
msgid "B<killpg>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:119
msgid "Sends a signal to all of the members of a specified process group."
msgstr ""

#. type: TP
#: build/C/man7/signal.7:119
#, no-wrap
msgid "B<pthread_kill>(3)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:123
msgid ""
"Sends a signal to a specified POSIX thread in the same process as the "
"caller."
msgstr ""

#. type: TP
#: build/C/man7/signal.7:123
#, no-wrap
msgid "B<tgkill>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:128
msgid ""
"Sends a signal to a specified thread within a specific process.  (This is "
"the system call used to implement B<pthread_kill>(3).)"
msgstr ""

#. type: TP
#: build/C/man7/signal.7:128
#, no-wrap
msgid "B<sigqueue>(3)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:131
msgid "Sends a real-time signal with accompanying data to a specified process."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:131
#, no-wrap
msgid "Waiting for a signal to be caught"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:135
msgid ""
"The following system calls suspend execution of the calling process or "
"thread until a signal is caught (or an unhandled signal terminates the "
"process):"
msgstr ""

#. type: TP
#: build/C/man7/signal.7:135
#, no-wrap
msgid "B<pause>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:138
msgid "Suspends execution until any signal is caught."
msgstr ""

#. type: TP
#: build/C/man7/signal.7:138
#, no-wrap
msgid "B<sigsuspend>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:142
msgid ""
"Temporarily changes the signal mask (see below) and suspends execution until "
"one of the unmasked signals is caught."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:142
#, no-wrap
msgid "Synchronously accepting a signal"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:149
msgid ""
"Rather than asynchronously catching a signal via a signal handler, it is "
"possible to synchronously accept the signal, that is, to block execution "
"until the signal is delivered, at which point the kernel returns information "
"about the signal to the caller.  There are two general ways to do this:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:157
msgid ""
"B<sigwaitinfo>(2), B<sigtimedwait>(2), and B<sigwait>(3)  suspend execution "
"until one of the signals in a specified set is delivered.  Each of these "
"calls returns information about the delivered signal."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:170
msgid ""
"B<signalfd>(2)  returns a file descriptor that can be used to read "
"information about signals that are delivered to the caller.  Each B<read>(2)  "
"from this file descriptor blocks until one of the signals in the set "
"specified in the B<signalfd>(2)  call is delivered to the caller.  The "
"buffer returned by B<read>(2)  contains a structure describing the signal."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:170
#, no-wrap
msgid "Signal mask and pending signals"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:177
msgid ""
"A signal may be I<blocked>, which means that it will not be delivered until "
"it is later unblocked.  Between the time when it is generated and when it is "
"delivered a signal is said to be I<pending>."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:186
msgid ""
"Each thread in a process has an independent I<signal mask>, which indicates "
"the set of signals that the thread is currently blocking.  A thread can "
"manipulate its signal mask using B<pthread_sigmask>(3).  In a traditional "
"single-threaded application, B<sigprocmask>(2)  can be used to manipulate "
"the signal mask."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:192 build/C/man2/sigprocmask.2:126
msgid ""
"A child created via B<fork>(2)  inherits a copy of its parent's signal mask; "
"the signal mask is preserved across B<execve>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:209
msgid ""
"A signal may be generated (and thus pending)  for a process as a whole "
"(e.g., when sent using B<kill>(2))  or for a specific thread (e.g., certain "
"signals, such as B<SIGSEGV> and B<SIGFPE>, generated as a consequence of "
"executing a specific machine-language instruction are thread directed, as "
"are signals targeted at a specific thread using B<pthread_kill>(3)).  A "
"process-directed signal may be delivered to any one of the threads that does "
"not currently have the signal blocked.  If more than one of the threads has "
"the signal unblocked, then the kernel chooses an arbitrary thread to which "
"to deliver the signal."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:216
msgid ""
"A thread can obtain the set of signals that it currently has pending using "
"B<sigpending>(2).  This set will consist of the union of the set of pending "
"process-directed signals and the set of signals pending for the calling "
"thread."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:222 build/C/man2/sigpending.2:85
msgid ""
"A child created via B<fork>(2)  initially has an empty pending signal set; "
"the pending signal set is preserved across an B<execve>(2)."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:222
#, no-wrap
msgid "Standard signals"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:234
msgid ""
"Linux supports the standard signals listed below.  Several signal numbers "
"are architecture-dependent, as indicated in the \"Value\" column.  (Where "
"three values are given, the first one is usually valid for alpha and sparc, "
"the middle one for x86, arm, and most other architectures, and the last one "
"for mips.  (Values for parisc are I<not> shown; see the Linux kernel source "
"for signal numbering on that architecture.)  A - denotes that a signal is "
"absent on the corresponding architecture.)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:236
msgid "First the signals described in the original POSIX.1-1990 standard."
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:240 build/C/man7/signal.7:276 build/C/man7/signal.7:305
#, no-wrap
msgid "Signal\tValue\tAction\tComment\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:241
#, no-wrap
msgid "SIGHUP\t\\01\tTerm\tHangup detected on controlling terminal\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:242
#, no-wrap
msgid "\t\t\tor death of controlling process\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:243
#, no-wrap
msgid "SIGINT\t\\02\tTerm\tInterrupt from keyboard\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:244
#, no-wrap
msgid "SIGQUIT\t\\03\tCore\tQuit from keyboard\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:245
#, no-wrap
msgid "SIGILL\t\\04\tCore\tIllegal Instruction\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:246
#, no-wrap
msgid "SIGABRT\t\\06\tCore\tAbort signal from B<abort>(3)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:247
#, no-wrap
msgid "SIGFPE\t\\08\tCore\tFloating point exception\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:248
#, no-wrap
msgid "SIGKILL\t\\09\tTerm\tKill signal\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:249
#, no-wrap
msgid "SIGSEGV\t11\tCore\tInvalid memory reference\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:250
#, no-wrap
msgid "SIGPIPE\t13\tTerm\tBroken pipe: write to pipe with no\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:251
#, no-wrap
msgid "\t\t\treaders\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:252
#, no-wrap
msgid "SIGALRM\t14\tTerm\tTimer signal from B<alarm>(2)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:253
#, no-wrap
msgid "SIGTERM\t15\tTerm\tTermination signal\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:254
#, no-wrap
msgid "SIGUSR1\t30,10,16\tTerm\tUser-defined signal 1\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:255
#, no-wrap
msgid "SIGUSR2\t31,12,17\tTerm\tUser-defined signal 2\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:256
#, no-wrap
msgid "SIGCHLD\t20,17,18\tIgn\tChild stopped or terminated\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:257
#, no-wrap
msgid "SIGCONT\t19,18,25\tCont\tContinue if stopped\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:258
#, no-wrap
msgid "SIGSTOP\t17,19,23\tStop\tStop process\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:259
#, no-wrap
msgid "SIGTSTP\t18,20,24\tStop\tStop typed at terminal\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:260
#, no-wrap
msgid "SIGTTIN\t21,21,26\tStop\tTerminal input for background process\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:261
#, no-wrap
msgid "SIGTTOU\t22,22,27\tStop\tTerminal output for background process\n"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:269
msgid "The signals B<SIGKILL> and B<SIGSTOP> cannot be caught, blocked, or ignored."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:272
msgid ""
"Next the signals not in the POSIX.1-1990 standard but described in SUSv2 and "
"POSIX.1-2001."
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:277
#, no-wrap
msgid "SIGBUS\t10,7,10\tCore\tBus error (bad memory access)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:278
#, no-wrap
msgid "SIGPOLL\t\tTerm\tPollable event (Sys V).\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:279
#, no-wrap
msgid "\t\t\tSynonym for B<SIGIO>\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:280
#, no-wrap
msgid "SIGPROF\t27,27,29\tTerm\tProfiling timer expired\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:281
#, no-wrap
msgid "SIGSYS\t12,31,12\tCore\tBad argument to routine (SVr4)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:282
#, no-wrap
msgid "SIGTRAP\t5\tCore\tTrace/breakpoint trap\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:283
#, no-wrap
msgid "SIGURG\t16,23,21\tIgn\tUrgent condition on socket (4.2BSD)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:284
#, no-wrap
msgid "SIGVTALRM\t26,26,28\tTerm\tVirtual alarm clock (4.2BSD)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:285
#, no-wrap
msgid "SIGXCPU\t24,24,30\tCore\tCPU time limit exceeded (4.2BSD)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:286
#, no-wrap
msgid "SIGXFSZ\t25,25,31\tCore\tFile size limit exceeded (4.2BSD)\n"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:299
msgid ""
"Up to and including Linux 2.2, the default behavior for B<SIGSYS>, "
"B<SIGXCPU>, B<SIGXFSZ>, and (on architectures other than SPARC and MIPS)  "
"B<SIGBUS> was to terminate the process (without a core dump).  (On some "
"other UNIX systems the default action for B<SIGXCPU> and B<SIGXFSZ> is to "
"terminate the process without a core dump.)  Linux 2.4 conforms to the "
"POSIX.1-2001 requirements for these signals, terminating the process with a "
"core dump."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:301
msgid "Next various other signals."
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:306
#, no-wrap
msgid "SIGIOT\t6\tCore\tIOT trap. A synonym for B<SIGABRT>\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:307
#, no-wrap
msgid "SIGEMT\t7,-,7\tTerm\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:308
#, no-wrap
msgid "SIGSTKFLT\t-,16,-\tTerm\tStack fault on coprocessor (unused)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:309
#, no-wrap
msgid "SIGIO\t23,29,22\tTerm\tI/O now possible (4.2BSD)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:310
#, no-wrap
msgid "SIGCLD\t-,-,18\tIgn\tA synonym for B<SIGCHLD>\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:311
#, no-wrap
msgid "SIGPWR\t29,30,19\tTerm\tPower failure (System V)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:312
#, no-wrap
msgid "SIGINFO\t29,-,-\t\tA synonym for B<SIGPWR>\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:313
#, no-wrap
msgid "SIGLOST\t-,-,-\tTerm\tFile lock lost (unused)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:314
#, no-wrap
msgid "SIGWINCH\t28,28,20\tIgn\tWindow resize signal (4.3BSD, Sun)\n"
msgstr ""

#. type: tbl table
#: build/C/man7/signal.7:315
#, no-wrap
msgid "SIGUNUSED\t-,31,-\tCore\tSynonymous with B<SIGSYS>\n"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:325
msgid "(Signal 29 is B<SIGINFO> / B<SIGPWR> on an alpha but B<SIGLOST> on a sparc.)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:331
msgid ""
"B<SIGEMT> is not specified in POSIX.1-2001, but nevertheless appears on most "
"other UNIX systems, where its default action is typically to terminate the "
"process with a core dump."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:335
msgid ""
"B<SIGPWR> (which is not specified in POSIX.1-2001) is typically ignored by "
"default on those other UNIX systems where it appears."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:339
msgid ""
"B<SIGIO> (which is not specified in POSIX.1-2001) is ignored by default on "
"several other UNIX systems."
msgstr ""

#.  parisc is the only exception: SIGSYS is 12, SIGUNUSED is 31
#. type: Plain text
#: build/C/man7/signal.7:346
msgid ""
"Where defined, B<SIGUNUSED> is synonymous with B<SIGSYS> on most "
"architectures."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:346
#, no-wrap
msgid "Real-time signals"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:356
msgid ""
"Linux supports real-time signals as originally defined in the POSIX.1b "
"real-time extensions (and now included in POSIX.1-2001).  The range of "
"supported real-time signals is defined by the macros B<SIGRTMIN> and "
"B<SIGRTMAX>.  POSIX.1-2001 requires that an implementation support at least "
"B<_POSIX_RTSIG_MAX> (8) real-time signals."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:378
msgid ""
"The Linux kernel supports a range of 32 different real-time signals, "
"numbered 33 to 64.  However, the glibc POSIX threads implementation "
"internally uses two (for NPTL) or three (for LinuxThreads) real-time signals "
"(see B<pthreads>(7)), and adjusts the value of B<SIGRTMIN> suitably (to 34 "
"or 35).  Because the range of available real-time signals varies according "
"to the glibc threading implementation (and this variation can occur at run "
"time according to the available kernel and glibc), and indeed the range of "
"real-time signals varies across UNIX systems, programs should I<never refer "
"to real-time signals using hard-coded numbers>, but instead should always "
"refer to real-time signals using the notation B<SIGRTMIN>+n, and include "
"suitable (run-time) checks that B<SIGRTMIN>+n does not exceed B<SIGRTMAX>."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:382
msgid ""
"Unlike standard signals, real-time signals have no predefined meanings: the "
"entire set of real-time signals can be used for application-defined "
"purposes."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:385
msgid ""
"The default action for an unhandled real-time signal is to terminate the "
"receiving process."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:387
msgid "Real-time signals are distinguished by the following:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:391
msgid ""
"Multiple instances of real-time signals can be queued.  By contrast, if "
"multiple instances of a standard signal are delivered while that signal is "
"currently blocked, then only one instance is queued."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:411
msgid ""
"If the signal is sent using B<sigqueue>(3), an accompanying value (either an "
"integer or a pointer) can be sent with the signal.  If the receiving process "
"establishes a handler for this signal using the B<SA_SIGINFO> flag to "
"B<sigaction>(2), then it can obtain this data via the I<si_value> field of "
"the I<siginfo_t> structure passed as the second argument to the handler.  "
"Furthermore, the I<si_pid> and I<si_uid> fields of this structure can be "
"used to obtain the PID and real user ID of the process sending the signal."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:420
msgid ""
"Real-time signals are delivered in a guaranteed order.  Multiple real-time "
"signals of the same type are delivered in the order they were sent.  If "
"different real-time signals are sent to a process, they are delivered "
"starting with the lowest-numbered signal.  (I.e., low-numbered signals have "
"highest priority.)  By contrast, if multiple standard signals are pending "
"for a process, the order in which they are delivered is unspecified."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:425
msgid ""
"If both standard and real-time signals are pending for a process, POSIX "
"leaves it unspecified which is delivered first.  Linux, like many other "
"implementations, gives priority to standard signals in this case."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:448
msgid ""
"According to POSIX, an implementation should permit at least "
"B<_POSIX_SIGQUEUE_MAX> (32) real-time signals to be queued to a process.  "
"However, Linux does things differently.  In kernels up to and including "
"2.6.7, Linux imposes a system-wide limit on the number of queued real-time "
"signals for all processes.  This limit can be viewed and (with privilege) "
"changed via the I</proc/sys/kernel/rtsig-max> file.  A related file, "
"I</proc/sys/kernel/rtsig-nr>, can be used to find out how many real-time "
"signals are currently queued.  In Linux 2.6.8, these I</proc> interfaces "
"were replaced by the B<RLIMIT_SIGPENDING> resource limit, which specifies a "
"per-user limit for queued signals; see B<setrlimit>(2)  for further details."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:448
#, no-wrap
msgid "Async-signal-safe functions"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:457
msgid ""
"A signal handler function must be very careful, since processing elsewhere "
"may be interrupted at some arbitrary point in the execution of the program.  "
"POSIX has the concept of \"safe function\".  If a signal interrupts the "
"execution of an unsafe function, and I<handler> calls an unsafe function, "
"then the behavior of the program is undefined."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:461
msgid ""
"POSIX.1-2004 (also known as POSIX.1-2001 Technical Corrigendum 2)  requires "
"an implementation to guarantee that the following functions can be safely "
"called inside a signal handler:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:582
#, no-wrap
msgid ""
"_Exit()\n"
"_exit()\n"
"abort()\n"
"accept()\n"
"access()\n"
"aio_error()\n"
"aio_return()\n"
"aio_suspend()\n"
"alarm()\n"
"bind()\n"
"cfgetispeed()\n"
"cfgetospeed()\n"
"cfsetispeed()\n"
"cfsetospeed()\n"
"chdir()\n"
"chmod()\n"
"chown()\n"
"clock_gettime()\n"
"close()\n"
"connect()\n"
"creat()\n"
"dup()\n"
"dup2()\n"
"execle()\n"
"execve()\n"
"fchmod()\n"
"fchown()\n"
"fcntl()\n"
"fdatasync()\n"
"fork()\n"
"fpathconf()\n"
"fstat()\n"
"fsync()\n"
"ftruncate()\n"
"getegid()\n"
"geteuid()\n"
"getgid()\n"
"getgroups()\n"
"getpeername()\n"
"getpgrp()\n"
"getpid()\n"
"getppid()\n"
"getsockname()\n"
"getsockopt()\n"
"getuid()\n"
"kill()\n"
"link()\n"
"listen()\n"
"lseek()\n"
"lstat()\n"
"mkdir()\n"
"mkfifo()\n"
"open()\n"
"pathconf()\n"
"pause()\n"
"pipe()\n"
"poll()\n"
"posix_trace_event()\n"
"pselect()\n"
"raise()\n"
"read()\n"
"readlink()\n"
"recv()\n"
"recvfrom()\n"
"recvmsg()\n"
"rename()\n"
"rmdir()\n"
"select()\n"
"sem_post()\n"
"send()\n"
"sendmsg()\n"
"sendto()\n"
"setgid()\n"
"setpgid()\n"
"setsid()\n"
"setsockopt()\n"
"setuid()\n"
"shutdown()\n"
"sigaction()\n"
"sigaddset()\n"
"sigdelset()\n"
"sigemptyset()\n"
"sigfillset()\n"
"sigismember()\n"
"signal()\n"
"sigpause()\n"
"sigpending()\n"
"sigprocmask()\n"
"sigqueue()\n"
"sigset()\n"
"sigsuspend()\n"
"sleep()\n"
"sockatmark()\n"
"socket()\n"
"socketpair()\n"
"stat()\n"
"symlink()\n"
"sysconf()\n"
"tcdrain()\n"
"tcflow()\n"
"tcflush()\n"
"tcgetattr()\n"
"tcgetpgrp()\n"
"tcsendbreak()\n"
"tcsetattr()\n"
"tcsetpgrp()\n"
"time()\n"
"timer_getoverrun()\n"
"timer_gettime()\n"
"timer_settime()\n"
"times()\n"
"umask()\n"
"uname()\n"
"unlink()\n"
"utime()\n"
"wait()\n"
"waitpid()\n"
"write()\n"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:587
msgid ""
"POSIX.1-2008 removes fpathconf(), pathconf(), and sysconf()  from the above "
"list, and adds the following functions:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:610
#, no-wrap
msgid ""
"execl()\n"
"execv()\n"
"faccessat()\n"
"fchmodat()\n"
"fchownat()\n"
"fexecve()\n"
"fstatat()\n"
"futimens()\n"
"linkat()\n"
"mkdirat()\n"
"mkfifoat()\n"
"mknod()\n"
"mknodat()\n"
"openat()\n"
"readlinkat()\n"
"renameat()\n"
"symlinkat()\n"
"unlinkat()\n"
"utimensat()\n"
"utimes()\n"
msgstr ""

#. type: SS
#: build/C/man7/signal.7:612
#, no-wrap
msgid "Interruption of system calls and library functions by signal handlers"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:615
msgid ""
"If a signal handler is invoked while a system call or library function call "
"is blocked, then either:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:617
msgid "the call is automatically restarted after the signal handler returns; or"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:620
msgid "the call fails with the error B<EINTR>."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:628
msgid ""
"Which of these two behaviors occurs depends on the interface and whether or "
"not the signal handler was established using the B<SA_RESTART> flag (see "
"B<sigaction>(2)).  The details vary across UNIX systems; below, the details "
"for Linux."
msgstr ""

#.  The following system calls use ERESTARTSYS,
#.  so that they are restartable
#. type: Plain text
#: build/C/man7/signal.7:637
msgid ""
"If a blocked call to one of the following interfaces is interrupted by a "
"signal handler, then the call will be automatically restarted after the "
"signal handler returns if the B<SA_RESTART> flag was used; otherwise the "
"call will fail with the error B<EINTR>:"
msgstr ""

#.  commit 1ca39ab9d21ac93f94b9e3eb364ea9a5cf2aba06
#. type: Plain text
#: build/C/man7/signal.7:672
msgid ""
"B<read>(2), B<readv>(2), B<write>(2), B<writev>(2), and B<ioctl>(2)  calls "
"on \"slow\" devices.  A \"slow\" device is one where the I/O call may block "
"for an indefinite time, for example, a terminal, pipe, or socket.  (A disk "
"is not a slow device according to this definition.)  A B<read>(2)  on an "
"B<eventfd>(2), B<signalfd>(2), B<timerfd>(2), B<fanotify>(7), or "
"B<inotify>(7)  file descriptor is also considered to be a \"slow\" "
"operation.  (Before Linux 3.8, reads from an B<inotify>(7)  file descriptor "
"were not restartable; when interrupted by a signal handler, B<read>(2)  "
"always failed with the error B<EINTR>.)  If an I/O call on a slow device has "
"already transferred some data by the time it is interrupted by a signal "
"handler, then the call will return a success status (normally, the number of "
"bytes transferred)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:676
msgid "B<open>(2), if it can block (e.g., when opening a FIFO; see B<fifo>(7))."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:683
msgid "B<wait>(2), B<wait3>(2), B<wait4>(2), B<waitid>(2), and B<waitpid>(2)."
msgstr ""

#.  If a timeout (setsockopt()) is in effect on the socket, then these
#.  system calls switch to using EINTR.  Consequently, they and are not
#.  automatically restarted, and they show the stop/cont behavior
#.  described below.  (Verified from 2.6.26 source, and by experiment; mtk)
#.  FIXME . What about sendmmsg()?
#. type: Plain text
#: build/C/man7/signal.7:701
msgid ""
"Socket interfaces: B<accept>(2), B<connect>(2), B<recv>(2), B<recvfrom>(2), "
"B<recvmmsg>(2), B<recvmsg>(2), B<send>(2), B<sendto>(2), and B<sendmsg>(2), "
"unless a timeout has been set on the socket (see below)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:711
msgid ""
"File locking interfaces: B<flock>(2)  and the B<F_SETLKW> and "
"B<F_OFD_SETLKW> operations of B<fcntl>(2)"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:718
msgid ""
"POSIX message queue interfaces: B<mq_receive>(3), B<mq_timedreceive>(3), "
"B<mq_send>(3), and B<mq_timedsend>(3)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:723
msgid ""
"B<futex>(2)  B<FUTEX_WAIT> (since Linux 2.6.22; beforehand, always failed "
"with B<EINTR>)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:725
msgid "B<getrandom>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:729
msgid "B<pthread_mutex_lock>(3), B<pthread_cond_wait>(3), and related APIs."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:736
msgid ""
"POSIX semaphore interfaces: B<sem_wait>(3)  and B<sem_timedwait>(3)  (since "
"Linux 2.6.22; beforehand, always failed with B<EINTR>)."
msgstr ""

#.  These are the system calls that give EINTR or ERESTARTNOHAND
#.  on interruption by a signal handler.
#. type: Plain text
#: build/C/man7/signal.7:747
msgid ""
"The following interfaces are never restarted after being interrupted by a "
"signal handler, regardless of the use of B<SA_RESTART>; they always fail "
"with the error B<EINTR> when interrupted by a signal handler:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:762 build/C/man7/signal.7:837
msgid ""
"\"Input\" socket interfaces, when a timeout (B<SO_RCVTIMEO>)  has been set "
"on the socket using B<setsockopt>(2): B<accept>(2), B<recv>(2), "
"B<recvfrom>(2), B<recvmmsg>(2)  (also with a non-NULL I<timeout> argument), "
"and B<recvmsg>(2)."
msgstr ""

#.  FIXME . What about sendmmsg()?
#. type: Plain text
#: build/C/man7/signal.7:773 build/C/man7/signal.7:848
msgid ""
"\"Output\" socket interfaces, when a timeout (B<SO_SNDTIMEO>)  has been set "
"on the socket using B<setsockopt>(2): B<connect>(2), B<send>(2), "
"B<sendto>(2), and B<sendmsg>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:780
msgid ""
"Interfaces used to wait for signals: B<pause>(2), B<sigsuspend>(2), "
"B<sigtimedwait>(2), and B<sigwaitinfo>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:789
msgid ""
"File descriptor multiplexing interfaces: B<epoll_wait>(2), "
"B<epoll_pwait>(2), B<poll>(2), B<ppoll>(2), B<select>(2), and B<pselect>(2)."
msgstr ""

#.  On some other systems, SA_RESTART does restart these system calls
#. type: Plain text
#: build/C/man7/signal.7:797
msgid ""
"System V IPC interfaces: B<msgrcv>(2), B<msgsnd>(2), B<semop>(2), and "
"B<semtimedop>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:803
msgid "Sleep interfaces: B<clock_nanosleep>(2), B<nanosleep>(2), and B<usleep>(3)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:805
msgid "B<io_getevents>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:811
msgid ""
"The B<sleep>(3)  function is also never restarted if interrupted by a "
"handler, but gives a success return: the number of seconds remaining to "
"sleep."
msgstr ""

#. type: SS
#: build/C/man7/signal.7:811
#, no-wrap
msgid "Interruption of system calls and library functions by stop signals"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:820
msgid ""
"On Linux, even in the absence of signal handlers, certain blocking "
"interfaces can fail with the error B<EINTR> after the process is stopped by "
"one of the stop signals and then resumed via B<SIGCONT>.  This behavior is "
"not sanctioned by POSIX.1, and doesn't occur on other systems."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:822
msgid "The Linux interfaces that display this behavior are:"
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:851
msgid "B<epoll_wait>(2), B<epoll_pwait>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:854
msgid "B<semop>(2), B<semtimedop>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:857
msgid "B<sigtimedwait>(2), B<sigwaitinfo>(2)."
msgstr ""

#.  commit 1ca39ab9d21ac93f94b9e3eb364ea9a5cf2aba06
#. type: Plain text
#: build/C/man7/signal.7:864
msgid "Linux 3.7 and earlier: B<read>(2)  from an B<inotify>(7)  file descriptor."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:870
msgid ""
"Linux 2.6.21 and earlier: B<futex>(2)  B<FUTEX_WAIT>, B<sem_timedwait>(3), "
"B<sem_wait>(3)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:874
msgid "Linux 2.6.8 and earlier: B<msgrcv>(2), B<msgsnd>(2)."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:877
msgid "Linux 2.4 and earlier: B<nanosleep>(2)."
msgstr ""

#.  It must be a *very* long time since this was true:
#.  .SH BUGS
#.  .B SIGIO
#.  and
#.  .B SIGLOST
#.  have the same value.
#.  The latter is commented out in the kernel source, but
#.  the build process of some software still thinks that
#.  signal 29 is
#.  .BR SIGLOST .
#. type: Plain text
#: build/C/man7/signal.7:890
msgid "POSIX.1, except as noted."
msgstr ""

#. type: Plain text
#: build/C/man7/signal.7:925
msgid ""
"B<kill>(1), B<getrlimit>(2), B<kill>(2), B<killpg>(2), "
"B<restart_syscall>(2), B<rt_sigqueueinfo>(2), B<setitimer>(2), "
"B<setrlimit>(2), B<sgetmask>(2), B<sigaction>(2), B<sigaltstack>(2), "
"B<signal>(2), B<signalfd>(2), B<sigpending>(2), B<sigprocmask>(2), "
"B<sigreturn>(2), B<sigsuspend>(2), B<sigwaitinfo>(2), B<abort>(3), "
"B<bsd_signal>(3), B<longjmp>(3), B<raise>(3), B<pthread_sigqueue>(3), "
"B<sigqueue>(3), B<sigset>(3), B<sigsetops>(3), B<sigvec>(3), B<sigwait>(3), "
"B<strsignal>(3), B<sysv_signal>(3), B<core>(5), B<proc>(5), B<pthreads>(7), "
"B<sigevent>(7)"
msgstr ""

#. type: TH
#: build/C/man2/signalfd.2:20
#, no-wrap
msgid "SIGNALFD"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:23
msgid "signalfd - create a file descriptor for accepting signals"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:25
msgid "B<#include E<lt>sys/signalfd.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:27
msgid "B<int signalfd(int >I<fd>B<, const sigset_t *>I<mask>B<, int >I<flags>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:38
msgid ""
"B<signalfd>()  creates a file descriptor that can be used to accept signals "
"targeted at the caller.  This provides an alternative to the use of a signal "
"handler or B<sigwaitinfo>(2), and has the advantage that the file descriptor "
"may be monitored by B<select>(2), B<poll>(2), and B<epoll>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:58
msgid ""
"The I<mask> argument specifies the set of signals that the caller wishes to "
"accept via the file descriptor.  This argument is a signal set whose "
"contents can be initialized using the macros described in B<sigsetops>(3).  "
"Normally, the set of signals to be received via the file descriptor should "
"be blocked using B<sigprocmask>(2), to prevent the signals being handled "
"according to their default dispositions.  It is not possible to receive "
"B<SIGKILL> or B<SIGSTOP> signals via a signalfd file descriptor; these "
"signals are silently ignored if specified in I<mask>."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:72
msgid ""
"If the I<fd> argument is -1, then the call creates a new file descriptor and "
"associates the signal set specified in I<mask> with that descriptor.  If "
"I<fd> is not -1, then it must specify a valid existing signalfd file "
"descriptor, and I<mask> is used to replace the signal set associated with "
"that descriptor."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:77
msgid ""
"Starting with Linux 2.6.27, the following values may be bitwise ORed in "
"I<flags> to change the behavior of B<signalfd>():"
msgstr ""

#. type: TP
#: build/C/man2/signalfd.2:77
#, no-wrap
msgid "B<SFD_NONBLOCK>"
msgstr ""

#. type: TP
#: build/C/man2/signalfd.2:85
#, no-wrap
msgid "B<SFD_CLOEXEC>"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:102
msgid ""
"B<signalfd>()  returns a file descriptor that supports the following "
"operations:"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:121
msgid ""
"If one or more of the signals specified in I<mask> is pending for the "
"process, then the buffer supplied to B<read>(2)  is used to return one or "
"more I<signalfd_siginfo> structures (see below) that describe the signals.  "
"The B<read>(2)  returns information for as many signals as are pending and "
"will fit in the supplied buffer.  The buffer must be at least "
"I<sizeof(struct signalfd_siginfo)> bytes.  The return value of the "
"B<read>(2)  is the total number of bytes read."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:129
msgid ""
"As a consequence of the B<read>(2), the signals are consumed, so that they "
"are no longer pending for the process (i.e., will not be caught by signal "
"handlers, and cannot be accepted using B<sigwaitinfo>(2))."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:140
msgid ""
"If none of the signals in I<mask> is pending for the process, then the "
"B<read>(2)  either blocks until one of the signals in I<mask> is generated "
"for the process, or fails with the error B<EAGAIN> if the file descriptor "
"has been made nonblocking."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:153
msgid ""
"The file descriptor is readable (the B<select>(2)  I<readfds> argument; the "
"B<poll>(2)  B<POLLIN> flag)  if one or more of the signals in I<mask> is "
"pending for the process."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:160
msgid ""
"The signalfd file descriptor also supports the other file-descriptor "
"multiplexing APIs: B<pselect>(2), B<ppoll>(2), and B<epoll>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:165
msgid ""
"When the file descriptor is no longer required it should be closed.  When "
"all file descriptors associated with the same signalfd object have been "
"closed, the resources for object are freed by the kernel."
msgstr ""

#. type: SS
#: build/C/man2/signalfd.2:165
#, no-wrap
msgid "The signalfd_siginfo structure"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:171
msgid ""
"The format of the I<signalfd_siginfo> structure(s) returned by B<read>(2)s "
"from a signalfd file descriptor is as follows:"
msgstr ""

#.  ssi_trapno is unused on most arches
#.  FIXME Since Linux 2.6.37 there is 'uint16_t ssi_addr_lsb'
#.  in the signalfd_siginfo structure. This needs to be documented.
#. type: Plain text
#: build/C/man2/signalfd.2:198
#, no-wrap
msgid ""
"struct signalfd_siginfo {\n"
"    uint32_t ssi_signo;   /* Signal number */\n"
"    int32_t  ssi_errno;   /* Error number (unused) */\n"
"    int32_t  ssi_code;    /* Signal code */\n"
"    uint32_t ssi_pid;     /* PID of sender */\n"
"    uint32_t ssi_uid;     /* Real UID of sender */\n"
"    int32_t  ssi_fd;      /* File descriptor (SIGIO) */\n"
"    uint32_t ssi_tid;     /* Kernel timer ID (POSIX timers)\n"
"    uint32_t ssi_band;    /* Band event (SIGIO) */\n"
"    uint32_t ssi_overrun; /* POSIX timer overrun count */\n"
"    uint32_t ssi_trapno;  /* Trap number that caused signal */\n"
"    int32_t  ssi_status;  /* Exit status or signal (SIGCHLD) */\n"
"    int32_t  ssi_int;     /* Integer sent by sigqueue(3) */\n"
"    uint64_t ssi_ptr;     /* Pointer sent by sigqueue(3) */\n"
"    uint64_t ssi_utime;   /* User CPU time consumed (SIGCHLD) */\n"
"    uint64_t ssi_stime;   /* System CPU time consumed (SIGCHLD) */\n"
"    uint64_t ssi_addr;    /* Address that generated signal\n"
"                             (for hardware-generated signals) */\n"
"    uint8_t  pad[I<X>];      /* Pad size to 128 bytes (allow for\n"
"                              additional fields in the future) */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:221
msgid ""
"Each of the fields in this structure is analogous to the similarly named "
"field in the I<siginfo_t> structure.  The I<siginfo_t> structure is "
"described in B<sigaction>(2).  Not all fields in the returned "
"I<signalfd_siginfo> structure will be valid for a specific signal; the set "
"of valid fields can be determined from the value returned in the I<ssi_code> "
"field.  This field is the analog of the I<siginfo_t> I<si_code> field; see "
"B<sigaction>(2)  for details."
msgstr ""

#. type: SS
#: build/C/man2/signalfd.2:221 build/C/man2/timerfd_create.2:276
#, no-wrap
msgid "fork(2) semantics"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:229
msgid ""
"After a B<fork>(2), the child inherits a copy of the signalfd file "
"descriptor.  A B<read>(2)  from the file descriptor in the child will return "
"information about signals queued to the child."
msgstr ""

#. type: SS
#: build/C/man2/signalfd.2:229 build/C/man2/timerfd_create.2:288
#, no-wrap
msgid "execve(2) semantics"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:241
msgid ""
"Just like any other file descriptor, a signalfd file descriptor remains open "
"across an B<execve>(2), unless it has been marked for close-on-exec (see "
"B<fcntl>(2)).  Any signals that were available for reading before the "
"B<execve>(2)  remain available to the newly loaded program.  (This is "
"analogous to traditional signal semantics, where a blocked signal that is "
"pending remains pending across an B<execve>(2).)"
msgstr ""

#. type: SS
#: build/C/man2/signalfd.2:241
#, no-wrap
msgid "Thread semantics"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:251
msgid ""
"The semantics of signalfd file descriptors in a multithreaded program mirror "
"the standard semantics for signals.  In other words, when a thread reads "
"from a signalfd file descriptor, it will read the signals that are directed "
"to the thread itself and the signals that are directed to the process (i.e., "
"the entire thread group).  (A thread will not be able to read signals that "
"are directed to other threads in the process.)"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:265
msgid ""
"On success, B<signalfd>()  returns a signalfd file descriptor; this is "
"either a new file descriptor (if I<fd> was -1), or I<fd> if I<fd> was a "
"valid signalfd file descriptor.  On error, -1 is returned and I<errno> is "
"set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:271
msgid "The I<fd> file descriptor is not a valid file descriptor."
msgstr ""

#.  or, the
#.  .I sizemask
#.  argument is not equal to
#.  .IR sizeof(sigset_t) ;
#. type: Plain text
#: build/C/man2/signalfd.2:279
msgid "I<fd> is not a valid signalfd file descriptor."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:286 build/C/man2/timerfd_create.2:327
msgid "I<flags> is invalid; or, in Linux 2.6.26 or earlier, I<flags> is nonzero."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:289 build/C/man2/timerfd_create.2:330
msgid "The per-process limit of open file descriptors has been reached."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:299
msgid "There was insufficient memory to create a new signalfd file descriptor."
msgstr ""

#.  signalfd() is in glibc 2.7, but reportedly does not build
#. type: Plain text
#: build/C/man2/signalfd.2:307
msgid ""
"B<signalfd>()  is available on Linux since kernel 2.6.22.  Working support "
"is provided in glibc since version 2.8.  The B<signalfd4>()  system call "
"(see NOTES) is available on Linux since kernel 2.6.27."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:312
msgid "B<signalfd>()  and B<signalfd4>()  are Linux-specific."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:326
msgid ""
"A process can create multiple signalfd file descriptors.  This makes it "
"possible to accept different signals on different file descriptors.  (This "
"may be useful if monitoring the file descriptors using B<select>(2), "
"B<poll>(2), or B<epoll>(7): the arrival of different signals will make "
"different descriptors ready.)  If a signal appears in the I<mask> of more "
"than one of the file descriptors, then occurrences of that signal can be "
"read (once) from any one of the descriptors."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:336
msgid ""
"The underlying Linux system call requires an additional argument, I<size_t "
"sizemask>, which specifies the size of the I<mask> argument.  The glibc "
"B<signalfd>()  wrapper function does not include this argument, since it "
"provides the required value for the underlying system call."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:352
msgid ""
"There are two underlying Linux system calls: B<signalfd>()  and the more "
"recent B<signalfd4>().  The former system call does not implement a I<flags> "
"argument.  The latter system call implements the I<flags> values described "
"above.  Starting with glibc 2.9, the B<signalfd>()  wrapper function will "
"use B<signalfd4>()  where it is available."
msgstr ""

#.  The fix also was put into 2.6.24.5
#. type: Plain text
#: build/C/man2/signalfd.2:360
msgid ""
"In kernels before 2.6.25, the I<ssi_ptr> and I<ssi_int> fields are not "
"filled in with the data accompanying a signal sent by B<sigqueue>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:370
msgid ""
"The program below accepts the signals B<SIGINT> and B<SIGQUIT> via a "
"signalfd file descriptor.  The program terminates after accepting a "
"B<SIGQUIT> signal.  The following shell session demonstrates the use of the "
"program:"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:381
#, no-wrap
msgid ""
"$B< ./signalfd_demo>\n"
"B<^C>                   # Control-C generates SIGINT\n"
"Got SIGINT\n"
"B<^C>\n"
"Got SIGINT\n"
"B<^\\e>                    # Control-\\e generates SIGQUIT\n"
"Got SIGQUIT\n"
"$\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:391
#, no-wrap
msgid ""
"#include E<lt>sys/signalfd.hE<gt>\n"
"#include E<lt>signal.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:402
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
"    sigset_t mask;\n"
"    int sfd;\n"
"    struct signalfd_siginfo fdsi;\n"
"    ssize_t s;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:406
#, no-wrap
msgid ""
"    sigemptyset(&mask);\n"
"    sigaddset(&mask, SIGINT);\n"
"    sigaddset(&mask, SIGQUIT);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:409
#, no-wrap
msgid ""
"    /* Block signals so that they aren\\(aqt handled\n"
"       according to their default dispositions */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:412
#, no-wrap
msgid ""
"    if (sigprocmask(SIG_BLOCK, &mask, NULL) == -1)\n"
"        handle_error(\"sigprocmask\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:416
#, no-wrap
msgid ""
"    sfd = signalfd(-1, &mask, 0);\n"
"    if (sfd == -1)\n"
"        handle_error(\"signalfd\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:421
#, no-wrap
msgid ""
"    for (;;) {\n"
"        s = read(sfd, &fdsi, sizeof(struct signalfd_siginfo));\n"
"        if (s != sizeof(struct signalfd_siginfo))\n"
"            handle_error(\"read\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:432
#, no-wrap
msgid ""
"        if (fdsi.ssi_signo == SIGINT) {\n"
"            printf(\"Got SIGINT\\en\");\n"
"        } else if (fdsi.ssi_signo == SIGQUIT) {\n"
"            printf(\"Got SIGQUIT\\en\");\n"
"            exit(EXIT_SUCCESS);\n"
"        } else {\n"
"            printf(\"Read unexpected signal\\en\");\n"
"        }\n"
"    }\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/signalfd.2:446
msgid ""
"B<eventfd>(2), B<poll>(2), B<read>(2), B<select>(2), B<sigaction>(2), "
"B<sigprocmask>(2), B<sigwaitinfo>(2), B<timerfd_create>(2), B<sigsetops>(3), "
"B<sigwait>(3), B<epoll>(7), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigpause.3:25
#, no-wrap
msgid "SIGPAUSE"
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:28
msgid "sigpause - atomically release blocked signals and wait for interrupt"
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:33
#, no-wrap
msgid "B<int sigpause(int >I<sigmask>B<);  /* BSD (but see NOTES) */>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:35
#, no-wrap
msgid "B<int sigpause(int >I<sig>B<);      /* System V / UNIX 95 */>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:41
msgid "Don't use this function.  Use B<sigsuspend>(2)  instead."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:48
msgid ""
"The function B<sigpause>()  is designed to wait for some signal.  It changes "
"the process's signal mask (set of blocked signals), and then waits for a "
"signal to arrive.  Upon arrival of a signal, the original signal mask is "
"restored."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:56
msgid ""
"If B<sigpause>()  returns, it was interrupted by a signal and the return "
"value is -1 with I<errno> set to B<EINTR>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:61
msgid "The B<sigpause>()  function is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:65
msgid "The System V version of B<sigpause>()  is standardized in POSIX.1-2001."
msgstr ""

#.  __xpg_sigpause: UNIX 95, spec 1170, SVID, SVr4, XPG
#. type: Plain text
#: build/C/man3/sigpause.3:82
msgid ""
"The classical BSD version of this function appeared in 4.2BSD.  It sets the "
"process's signal mask to I<sigmask>.  UNIX 95 standardized the incompatible "
"System V version of this function, which removes only the specified signal "
"I<sig> from the process's signal mask.  The unfortunate situation with two "
"incompatible functions with the same name was solved by the "
"B<\\%sigsuspend>(2)  function, that takes a I<sigset_t\\ *> argument "
"(instead of an I<int>)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:85
msgid ""
"On Linux, this routine is a system call only on the Sparc (sparc64)  "
"architecture."
msgstr ""

#.  Libc4 and libc5 know only about the BSD version.
#
#
#.  For the BSD version, one usually uses a zero
#.  .I sigmask
#.  to indicate that no signals are to be blocked.
#. type: Plain text
#: build/C/man3/sigpause.3:111
msgid ""
"Glibc uses the BSD version if the B<_BSD_SOURCE> feature test macro is "
"defined and none of B<_POSIX_SOURCE>, B<_POSIX_C_SOURCE>, B<_XOPEN_SOURCE>, "
"B<_GNU_SOURCE>, or B<_SVID_SOURCE> is defined.  Otherwise, the System V "
"version is used (and B<_XOPEN_SOURCE> must be defined to obtain the "
"declaration).  Since glibc 2.19, only the System V version is exposed by "
"I<E<lt>signal.hE<gt>>; applications that formerly used the BSD B<sigpause>()  "
"should be amended to use B<sigsuspend>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigpause.3:119
msgid ""
"B<kill>(2), B<sigaction>(2), B<sigprocmask>(2), B<sigsuspend>(2), "
"B<sigblock>(3), B<sigvec>(3), B<feature_test_macros>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigpending.2:29
#, no-wrap
msgid "SIGPENDING"
msgstr ""

#. type: TH
#: build/C/man2/sigpending.2:29
#, no-wrap
msgid "2013-12-11"
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:32
msgid "sigpending - examine pending signals"
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:36
msgid "B<int sigpending(sigset_t *>I<set>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:45
msgid ""
"B<sigpending>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || "
"_POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:53
msgid ""
"B<sigpending>()  returns the set of signals that are pending for delivery to "
"the calling thread (i.e., the signals which have been raised while "
"blocked).  The mask of pending signals is returned in I<set>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:59
msgid ""
"B<sigpending>()  returns 0 on success and -1 on error.  In the event of an "
"error, I<errno> is set to indicate the cause."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:64
msgid ""
"I<set> points to memory which is not a valid part of the process address "
"space."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:74
msgid ""
"If a signal is both blocked and has a disposition of \"ignored\", it is "
"I<not> added to the mask of pending signals when generated."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:79
msgid ""
"The set of signals that is pending for a thread is the union of the set of "
"signals that is pending for that thread and the set of signals that is "
"pending for the process as a whole; see B<signal>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:91
msgid ""
"In versions of glibc up to and including 2.2.1, there is a bug in the "
"wrapper function for B<sigpending>()  which means that information about "
"pending real-time signals is not correctly returned."
msgstr ""

#. type: Plain text
#: build/C/man2/sigpending.2:99
msgid ""
"B<kill>(2), B<sigaction>(2), B<signal>(2), B<sigprocmask>(2), "
"B<sigsuspend>(2), B<sigsetops>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigprocmask.2:29
#, no-wrap
msgid "SIGPROCMASK"
msgstr ""

#. type: TH
#: build/C/man2/sigprocmask.2:29 build/C/man2/sigsuspend.2:29
#, no-wrap
msgid "2013-04-19"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:32
msgid "sigprocmask - examine and change blocked signals"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:37
msgid ""
"B<int sigprocmask(int >I<how>B<, const sigset_t *>I<set>B<,> B<sigset_t "
"*>I<oldset>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:46
msgid ""
"B<sigprocmask>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || "
"_POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:55
msgid ""
"B<sigprocmask>()  is used to fetch and/or change the signal mask of the "
"calling thread.  The signal mask is the set of signals whose delivery is "
"currently blocked for the caller (see also B<signal>(7)  for more details)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:59
msgid "The behavior of the call is dependent on the value of I<how>, as follows."
msgstr ""

#. type: TP
#: build/C/man2/sigprocmask.2:59
#, no-wrap
msgid "B<SIG_BLOCK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:64
msgid ""
"The set of blocked signals is the union of the current set and the I<set> "
"argument."
msgstr ""

#. type: TP
#: build/C/man2/sigprocmask.2:64
#, no-wrap
msgid "B<SIG_UNBLOCK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:70
msgid ""
"The signals in I<set> are removed from the current set of blocked signals.  "
"It is permissible to attempt to unblock a signal which is not blocked."
msgstr ""

#. type: TP
#: build/C/man2/sigprocmask.2:70
#, no-wrap
msgid "B<SIG_SETMASK>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:74
msgid "The set of blocked signals is set to the argument I<set>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:79
msgid ""
"If I<oldset> is non-NULL, the previous value of the signal mask is stored in "
"I<oldset>."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:88
msgid ""
"If I<set> is NULL, then the signal mask is unchanged (i.e., I<how> is "
"ignored), but the current value of the signal mask is nevertheless returned "
"in I<oldset> (if it is not NULL)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:93
msgid ""
"The use of B<sigprocmask>()  is unspecified in a multithreaded process; see "
"B<pthread_sigmask>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:99
msgid ""
"B<sigprocmask>()  returns 0 on success and -1 on error.  In the event of an "
"error, I<errno> is set to indicate the cause."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:107
msgid ""
"the I<set> or I<oldset> argument points outside the process's allocated "
"address space."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:112
msgid "The value specified in I<how> was invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:118
msgid ""
"It is not possible to block B<SIGKILL> or B<SIGSTOP>.  Attempts to do so are "
"silently ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:120
msgid "Each of the threads in a process has its own signal mask."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:140
msgid ""
"If B<SIGBUS>, B<SIGFPE>, B<SIGILL>, or B<SIGSEGV> are generated while they "
"are blocked, the result is undefined, unless the signal was generated by "
"B<kill>(2), B<sigqueue>(3), or B<raise>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigprocmask.2:155
msgid ""
"B<kill>(2), B<pause>(2), B<sigaction>(2), B<signal>(2), B<sigpending>(2), "
"B<sigsuspend>(2), B<pthread_sigmask>(3), B<sigqueue>(3), B<sigsetops>(3), "
"B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigqueue.3:28
#, no-wrap
msgid "SIGQUEUE"
msgstr ""

#. type: TH
#: build/C/man3/sigqueue.3:28 build/C/man3/sigwait.3:26
#, no-wrap
msgid "2013-12-16"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:31
msgid "sigqueue - queue a signal and data to a process"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:35
msgid ""
"B<int sigqueue(pid_t >I<pid>B<, int >I<sig>B<, const union sigval "
">I<value>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:43
msgid "B<sigqueue>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:55
msgid ""
"B<sigqueue>()  sends the signal specified in I<sig> to the process whose PID "
"is given in I<pid>.  The permissions required to send a signal are the same "
"as for B<kill>(2).  As with B<kill>(2), the null signal (0) can be used to "
"check if a process with a given PID exists."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:60
msgid ""
"The I<value> argument is used to specify an accompanying item of data "
"(either an integer or a pointer value) to be sent with the signal, and has "
"the following type:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:67
#, no-wrap
msgid ""
"union sigval {\n"
"    int   sival_int;\n"
"    void *sival_ptr;\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:83
msgid ""
"If the receiving process has installed a handler for this signal using the "
"B<SA_SIGINFO> flag to B<sigaction>(2), then it can obtain this data via the "
"I<si_value> field of the I<siginfo_t> structure passed as the second "
"argument to the handler.  Furthermore, the I<si_code> field of that "
"structure will be set to B<SI_QUEUE>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:91
msgid ""
"On success, B<sigqueue>()  returns 0, indicating that the signal was "
"successfully queued to the receiving process.  Otherwise, -1 is returned and "
"I<errno> is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:102
msgid "I<sig> was invalid."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:108
msgid ""
"The process does not have permission to send the signal to the receiving "
"process.  For the required permissions, see B<kill>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:112
msgid "No process has a PID matching I<pid>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:114
msgid "This system call first appeared in Linux 2.2."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:119
msgid "The B<sigqueue>()  function is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:129
msgid ""
"If this function results in the sending of a signal to the process that "
"invoked it, and that signal was not blocked by the calling thread, and no "
"other threads were willing to handle this signal (either by having it "
"unblocked, or by waiting for it using B<sigwait>(3)), then at least some "
"signal must be delivered to this thread before this function returns."
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:144
msgid ""
"On Linux, this function is implemented using the B<rt_sigqueueinfo>(2)  "
"system call.  The system call differs in its third argument, which is the "
"I<siginfo_t> structure that will be supplied to the receiving process's "
"signal handler or returned by the receiving process's B<sigtimedwait>(2)  "
"call.  Inside the glibc B<sigqueue>()  wrapper, this argument, I<uinfo>, is "
"initialized as follows:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:152
#, no-wrap
msgid ""
"uinfo.si_signo = sig;      /* Argument supplied to sigqueue() */\n"
"uinfo.si_code = SI_QUEUE;\n"
"uinfo.si_pid = getpid();   /* Process ID of sender */\n"
"uinfo.si_uid = getuid();   /* Real UID of sender */\n"
"uinfo.si_value = val;      /* Argument supplied to sigqueue() */\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigqueue.3:162
msgid ""
"B<kill>(2), B<rt_sigqueueinfo>(2), B<sigaction>(2), B<signal>(2), "
"B<pthread_sigqueue>(3), B<sigwait>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigreturn.2:30
#, no-wrap
msgid "SIGRETURN"
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:33
msgid "sigreturn - return from signal handler and cleanup stack frame"
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:35
msgid "B<int sigreturn(...);>"
msgstr ""

#.  See arch/x86/kernel/signal.c::__setup_frame() [in 3.17 source code]
#. type: Plain text
#: build/C/man2/sigreturn.2:45
msgid ""
"If the Linux kernel determines that an unblocked signal is pending for a "
"process, then, at the next transition back to user mode in that process "
"(e.g., upon return from a system call or when the process is rescheduled "
"onto the CPU), it saves various pieces of process context (processor status "
"word, registers, signal mask, and signal stack settings)  into the "
"user-space stack."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:52
msgid ""
"The kernel also arranges that, during the transition back to user mode, the "
"signal handler is called, and that, upon return from the handler, control "
"passes to a piece of user-space code commonly called the \"signal "
"trampoline\".  The signal trampoline code in turn calls B<sigreturn>()."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:65
msgid ""
"This B<sigreturn>()  call undoes everything that was done\\(emchanging the "
"process's signal mask, switching signal stacks (see "
"B<sigaltstack>(2))\\(emin order to invoke the signal handler.  It restores "
"the process's signal mask, switches stacks, and restores the process's "
"context (processor flags and registers, including the stack pointer and "
"instruction pointer), so that the process resumes execution at the point "
"where it was interrupted by the signal."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:68
msgid "B<sigreturn>()  never returns."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:74
msgid ""
"Many UNIX-type systems have a B<sigreturn>()  system call or near "
"equivalent.  However, this call is not specified in POSIX, and details of "
"its behavior vary across systems."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:83
msgid ""
"B<sigreturn>()  exists only to allow the implementation of signal handlers.  "
"It should B<never> be called directly.  Details of the arguments (if any) "
"passed to B<sigreturn>()  vary depending on the architecture."
msgstr ""

#.  See, for example, sysdeps/unix/sysv/linux/i386/sigaction.c and
#.  sysdeps/unix/sysv/linux/x86_64/sigaction.c in the glibc (2.20) source.
#. type: Plain text
#: build/C/man2/sigreturn.2:106
msgid ""
"Once upon a time, UNIX systems placed the signal trampoline code onto the "
"user stack.  Nowadays, pages of the user stack are protected so as to "
"disallow code execution.  Thus, on contemporary Linux systems, depending on "
"the architecture, the signal trampoline code lives either in the B<vdso>(7)  "
"or in the C library.  In the latter case, the C library supplies the "
"location of the trampoline code using the I<sa_restorer> field of the "
"I<sigaction> structure that is passed to B<sigaction>(2), and sets the "
"B<SA_RESTORER> flag in the I<sa_flags> field."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:115
msgid ""
"The saved process context information is placed in a I<ucontext_t> structure "
"(see I<E<lt>sys/ucontext.hE<gt>>).  That structure is visible within the "
"signal handler as the third argument of a handler established with the "
"B<SA_SIGINFO> flag."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:123
msgid ""
"On some other UNIX systems, the operation of the signal trampoline differs a "
"little.  In particular, on some systems, upon transitioning back to user "
"mode, the kernel passes control to the trampoline (rather than the signal "
"handler), and the trampoline code calls the signal handler (and then calls "
"B<sigreturn>()  once the handler returns)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigreturn.2:130
msgid ""
"B<kill>(2), B<restart_syscall>(2), B<sigaltstack>(2), B<signal>(2), "
"B<getcontext>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigset.3:26
#, no-wrap
msgid "SIGSET"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:29
msgid "sigset, sighold, sigrelse, sigignore - System V signal API"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:35
msgid "B<sighandler_t sigset(int >I<sig>B<, sighandler_t >I<disp>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:37
msgid "B<int sighold(int >I<sig>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:39
msgid "B<int sigrelse(int >I<sig>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:41
msgid "B<int sigignore(int >I<sig>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:52
msgid "B<sigset>(), B<sighold>(), B<sigrelse>(), B<sigignore>():"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:56
msgid "_XOPEN_SOURCE\\ E<gt>=\\ 500 || _XOPEN_SOURCE\\ &&\\ _XOPEN_SOURCE_EXTENDED"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:65
msgid ""
"These functions are provided in glibc as a compatibility interface for "
"programs that make use of the historical System V signal API.  This API is "
"obsolete: new applications should use the POSIX signal API (B<sigaction>(2), "
"B<sigprocmask>(2), etc.)"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:74
msgid ""
"The B<sigset>()  function modifies the disposition of the signal I<sig>.  "
"The I<disp> argument can be the address of a signal handler function, or one "
"of the following constants:"
msgstr ""

#. type: TP
#: build/C/man3/sigset.3:74
#, no-wrap
msgid "B<SIG_DFL>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:79
msgid "Reset the disposition of I<sig> to the default."
msgstr ""

#. type: TP
#: build/C/man3/sigset.3:79
#, no-wrap
msgid "B<SIG_IGN>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:83
msgid "Ignore I<sig>."
msgstr ""

#. type: TP
#: build/C/man3/sigset.3:83
#, no-wrap
msgid "B<SIG_HOLD>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:90
msgid ""
"Add I<sig> to the process's signal mask, but leave the disposition of I<sig> "
"unchanged."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:96
msgid ""
"If I<disp> specifies the address of a signal handler, then I<sig> is added "
"to the process's signal mask during execution of the handler."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:104
msgid ""
"If I<disp> was specified as a value other than B<SIG_HOLD>, then I<sig> is "
"removed from the process's signal mask."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:110 build/C/man3/sigvec.3:87
msgid "The dispositions for B<SIGKILL> and B<SIGSTOP> cannot be changed."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:116
msgid "The B<sighold>()  function adds I<sig> to the calling process's signal mask."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:122
msgid ""
"The B<sigrelse>()  function removes I<sig> from the calling process's signal "
"mask."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:129
msgid "The B<sigignore>()  function sets the disposition of I<sig> to B<SIG_IGN>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:145
msgid ""
"On success, B<sigset>()  returns B<SIG_HOLD> if I<sig> was blocked before "
"the call, or the signal's previous disposition if it was not blocked before "
"the call.  On error, B<sigset>()  returns -1, with I<errno> set to indicate "
"the error.  (But see BUGS below.)"
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:154
msgid ""
"The B<sighold>(), B<sigrelse>(), and B<sigignore>()  functions return 0 on "
"success; on error, these functions return -1 and set I<errno> to indicate "
"the error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:161
msgid ""
"For B<sigset>()  see the ERRORS under B<sigaction>(2)  and "
"B<sigprocmask>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:168
msgid "For B<sighold>()  and B<sigrelse>()  see the ERRORS under B<sigprocmask>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:173
msgid "For B<sigignore>(), see the errors under B<sigaction>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:190
msgid ""
"SVr4, POSIX.1-2001.  These functions are obsolete: do not use them in new "
"programs.  POSIX.1-2008 marks B<sighold>(), B<sigignore>(), B<sigpause>(), "
"B<sigrelse>(), and B<sigset>()  as obsolete, recommending the use of "
"B<sigaction>(2), B<sigprocmask>(2), B<pthread_sigmask>(3), and "
"B<sigsuspend>(2)  instead."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:192
msgid "These functions appeared in glibc version 2.1."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:198
msgid ""
"The I<sighandler_t> type is a GNU extension; it is used on this page only to "
"make the B<sigset>()  prototype more easily readable."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:206
msgid ""
"The B<sigset>()  function provides reliable signal handling semantics (as "
"when calling B<sigaction>(2)  with I<sa_mask> equal to 0)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:224
msgid ""
"On System V, the B<signal>()  function provides unreliable semantics (as "
"when calling B<sigaction>(2)  with I<sa_mask> equal to I<SA_RESETHAND | "
"SA_NODEFER>).  On BSD, B<signal>()  provides reliable semantics.  "
"POSIX.1-2001 leaves these aspects of B<signal>()  unspecified.  See "
"B<signal>(2)  for further details."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:232 build/C/man3/sigvec.3:272
msgid ""
"In order to wait for a signal, BSD and System V both provided a function "
"named B<sigpause>(3), but this function has a different argument on the two "
"systems.  See B<sigpause>(3)  for details."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:241
msgid ""
"In versions of glibc before 2.2, B<sigset>()  did not unblock I<sig> if "
"I<disp> was specified as a value other than B<SIG_HOLD>."
msgstr ""

#.  See http://sourceware.org/bugzilla/show_bug.cgi?id=1951
#. type: Plain text
#: build/C/man3/sigset.3:266
msgid ""
"In versions of glibc before 2.5, B<sigset>()  does not correctly return the "
"previous disposition of the signal in two cases.  First, if I<disp> is "
"specified as B<SIG_HOLD>, then a successful B<sigset>()  always returns "
"B<SIG_HOLD>.  Instead, it should return the previous disposition of the "
"signal (unless the signal was blocked, in which case B<SIG_HOLD> should be "
"returned).  Second, if the signal is currently blocked, then the return "
"value of a successful B<sigset>()  should be B<SIG_HOLD>.  Instead, the "
"previous disposition of the signal is returned.  These problems have been "
"fixed since glibc 2.5."
msgstr ""

#. type: Plain text
#: build/C/man3/sigset.3:276
msgid ""
"B<kill>(2), B<pause>(2), B<sigaction>(2), B<signal>(2), B<sigprocmask>(2), "
"B<raise>(3), B<sigpause>(3), B<sigvec>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigsetops.3:31
#, no-wrap
msgid "SIGSETOPS"
msgstr ""

#. type: TH
#: build/C/man3/sigsetops.3:31
#, no-wrap
msgid "2014-04-14"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:35
msgid ""
"sigemptyset, sigfillset, sigaddset, sigdelset, sigismember - POSIX signal "
"set operations"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:39
msgid "B<int sigemptyset(sigset_t *>I<set>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:41
msgid "B<int sigfillset(sigset_t *>I<set>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:43
msgid "B<int sigaddset(sigset_t *>I<set>B<, int >I<signum>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:45
msgid "B<int sigdelset(sigset_t *>I<set>B<, int >I<signum>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:47
msgid "B<int sigismember(const sigset_t *>I<set>B<, int >I<signum>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:59
msgid ""
"B<sigemptyset>(), B<sigfillset>(), B<sigaddset>(), B<sigdelset>(), "
"B<sigismember>():"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:61
msgid "_POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:65
msgid "These functions allow the manipulation of POSIX signal sets."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:70
msgid ""
"B<sigemptyset>()  initializes the signal set given by I<set> to empty, with "
"all signals excluded from the set."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:75
msgid "B<sigfillset>()  initializes I<set> to full, including all signals."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:83
msgid ""
"B<sigaddset>()  and B<sigdelset>()  add and delete respectively signal "
"I<signum> from I<set>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:89
msgid "B<sigismember>()  tests whether I<signum> is a member of I<set>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:107
msgid ""
"Objects of type I<sigset_t> must be initialized by a call to either "
"B<sigemptyset>()  or B<sigfillset>()  before being passed to the functions "
"B<sigaddset>(), B<sigdelset>()  and B<sigismember>()  or the additional "
"glibc functions described below (B<sigisemptyset>(), B<sigandset>(), and "
"B<sigorset>()).  The results are undefined if this is not done."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:114
msgid ""
"B<sigemptyset>(), B<sigfillset>(), B<sigaddset>(), and B<sigdelset>()  "
"return 0 on success and -1 on error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:123
msgid ""
"B<sigismember>()  returns 1 if I<signum> is a member of I<set>, 0 if "
"I<signum> is not a member, and -1 on error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:127
msgid "On error, these functions set I<errno> to indicate the cause of the error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:132
msgid "I<sig> is not a valid signal."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:145
msgid ""
"The B<sigemptyset>(), B<sigfillset>(), B<sigaddset>(), B<sigdelset>(), "
"B<sigismember>(), B<sigisemptyset>(), B<sigorset>(), and B<sigandset>()  "
"functions are thread-safe."
msgstr ""

#. type: SS
#: build/C/man3/sigsetops.3:148
#, no-wrap
msgid "Glibc notes"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:154
msgid ""
"If the B<_GNU_SOURCE> feature test macro is defined, then "
"I<E<lt>signal.hE<gt>> exposes three other functions for manipulating signal "
"sets:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:161
#, no-wrap
msgid ""
"B<int sigisemptyset(const sigset_t *>I<set>B<);>\n"
"B<int sigorset(sigset_t *>I<dest>B<, const sigset_t *>I<left>B<,>\n"
"B<              const sigset_t *>I<right>B<);>\n"
"B<int sigandset(sigset_t *>I<dest>B<, const sigset_t *>I<left>B<,>\n"
"B<              const sigset_t *>I<right>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:167
msgid ""
"B<sigisemptyset>()  returns 1 if I<set> contains no signals, and 0 "
"otherwise."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:183
msgid ""
"B<sigorset>()  places the union of the sets I<left> and I<right> in "
"I<dest>.  B<sigandset>()  places the intersection of the sets I<left> and "
"I<right> in I<dest>.  Both functions return 0 on success, and -1 on failure."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:186
msgid ""
"These functions are nonstandard (a few other systems provide similar "
"functions) and their use should be avoided in portable applications."
msgstr ""

#. type: Plain text
#: build/C/man3/sigsetops.3:191
msgid "B<sigaction>(2), B<sigpending>(2), B<sigprocmask>(2), B<sigsuspend>(2)"
msgstr ""

#. type: TH
#: build/C/man2/sigsuspend.2:29
#, no-wrap
msgid "SIGSUSPEND"
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:32
msgid "sigsuspend - wait for a signal"
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:36
msgid "B<int sigsuspend(const sigset_t *>I<mask>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:45
msgid ""
"B<sigsuspend>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || "
"_POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:53
msgid ""
"B<sigsuspend>()  temporarily replaces the signal mask of the calling process "
"with the mask given by I<mask> and then suspends the process until delivery "
"of a signal whose action is to invoke a signal handler or to terminate a "
"process."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:62
msgid ""
"If the signal terminates the process, then B<sigsuspend>()  does not "
"return.  If the signal is caught, then B<sigsuspend>()  returns after the "
"signal handler returns, and the signal mask is restored to the state before "
"the call to B<sigsuspend>()."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:70
msgid ""
"It is not possible to block B<SIGKILL> or B<SIGSTOP>; specifying these "
"signals in I<mask>, has no effect on the process's signal mask."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:76
msgid ""
"B<sigsuspend>()  always returns -1, with I<errno> set to indicate the error "
"(normally, B<EINTR>)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:81
msgid ""
"I<mask> points to memory which is not a valid part of the process address "
"space."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:84
msgid "The call was interrupted by a signal."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:104
msgid ""
"Normally, B<sigsuspend>()  is used in conjunction with B<sigprocmask>(2)  in "
"order to prevent delivery of a signal during the execution of a critical "
"code section.  The caller first blocks the signals with B<sigprocmask>(2).  "
"When the critical code has completed, the caller then waits for the signals "
"by calling B<sigsuspend>()  with the signal mask that was returned by "
"B<sigprocmask>(2)  (in the I<oldset> argument)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigsuspend.2:118
msgid ""
"B<kill>(2), B<pause>(2), B<sigaction>(2), B<signal>(2), B<sigprocmask>(2), "
"B<sigwaitinfo>(2), B<sigsetops>(3), B<sigwait>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigvec.3:26
#, no-wrap
msgid "SIGVEC"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:29
msgid "sigvec, sigblock, sigsetmask, siggetmask, sigmask - BSD signal API"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:33
msgid ""
"B<int sigvec(int >I<sig>B<, const struct sigvec *>I<vec>B<, struct sigvec "
"*>I<ovec>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:35
msgid "B<int sigmask(int >I<signum>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:37
msgid "B<int sigblock(int >I<mask>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:39
msgid "B<int sigsetmask(int >I<mask>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:41
msgid "B<int siggetmask(void);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:49
msgid "All functions shown above: _BSD_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:56
msgid ""
"These functions are provided in glibc as a compatibility interface for "
"programs that make use of the historical BSD signal API.  This API is "
"obsolete: new applications should use the POSIX signal API (B<sigaction>(2), "
"B<sigprocmask>(2), etc.)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:81
msgid ""
"The B<sigvec>()  function sets and/or gets the disposition of the signal "
"I<sig> (like the POSIX B<sigaction>(2)).  If I<vec> is not NULL, it points "
"to a I<sigvec> structure that defines the new disposition for I<sig>.  If "
"I<ovec> is not NULL, it points to a I<sigvec> structure that is used to "
"return the previous disposition of I<sig>.  To obtain the current "
"disposition of I<sig> without changing it, specify NULL for I<vec>, and a "
"non-null pointer for I<ovec>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:91
msgid "The I<sigvec> structure has the following form:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:99
#, no-wrap
msgid ""
"struct sigvec {\n"
"    void (*sv_handler)(int); /* Signal disposition */\n"
"    int    sv_mask;          /* Signals to be blocked in handler */\n"
"    int    sv_flags;         /* Flags */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:110
msgid ""
"The I<sv_handler> field specifies the disposition of the signal, and is "
"either: the address of a signal handler function; B<SIG_DFL>, meaning the "
"default disposition applies for the signal; or B<SIG_IGN>, meaning that the "
"signal is ignored."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:124
msgid ""
"If I<sv_handler> specifies the address of a signal handler, then I<sv_mask> "
"specifies a mask of signals that are to be blocked while the handler is "
"executing.  In addition, the signal for which the handler is invoked is also "
"blocked.  Attempts to block B<SIGKILL> or B<SIGSTOP> are silently ignored."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:131
msgid ""
"If I<sv_handler> specifies the address of a signal handler, then the "
"I<sv_flags> field specifies flags controlling what happens when the handler "
"is called.  This field may contain zero or more of the following flags:"
msgstr ""

#. type: TP
#: build/C/man3/sigvec.3:131
#, no-wrap
msgid "B<SV_INTERRUPT>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:139
msgid ""
"If the signal handler interrupts a blocking system call, then upon return "
"from the handler the system call will not be restarted: instead it will fail "
"with the error B<EINTR>.  If this flag is not specified, then system calls "
"are restarted by default."
msgstr ""

#. type: TP
#: build/C/man3/sigvec.3:139
#, no-wrap
msgid "B<SV_RESETHAND>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:148
msgid ""
"Reset the disposition of the signal to the default before calling the signal "
"handler.  If this flag is not specified, then the handler remains "
"established until explicitly removed by a later call to B<sigvec>()  or "
"until the process performs an B<execve>(2)."
msgstr ""

#. type: TP
#: build/C/man3/sigvec.3:148
#, no-wrap
msgid "B<SV_ONSTACK>"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:155
msgid ""
"Handle the signal on the alternate signal stack (historically established "
"under BSD using the obsolete B<sigstack>()  function; the POSIX replacement "
"is B<sigaltstack>(2))."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:165
msgid ""
"The B<sigmask>()  macro constructs and returns a \"signal mask\" for "
"I<signum>.  For example, we can initialize the I<vec.sv_mask> field given to "
"B<sigvec>()  using code such as the following:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:170
#, no-wrap
msgid ""
"    vec.sv_mask = sigmask(SIGQUIT) | sigmask(SIGABRT);\n"
"                /* Block SIGQUIT and SIGABRT during\n"
"                   handler execution */\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:185
msgid ""
"The B<sigblock>()  function adds the signals in I<mask> to the process's "
"signal mask (like POSIX I<sigprocmask(SIG_BLOCK)>), and returns the "
"process's previous signal mask.  Attempts to block B<SIGKILL> or B<SIGSTOP> "
"are silently ignored."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:193
msgid ""
"The B<sigsetmask>()  function sets the process's signal mask to the value "
"given in I<mask> (like POSIX I<sigprocmask(SIG_SETMASK)>), and returns the "
"process's previous signal mask."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:199
msgid ""
"The B<siggetmask>()  function returns the process's current signal mask.  "
"This call is equivalent to I<sigblock(0)>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:205
msgid ""
"The B<sigvec>()  function returns 0 on success; on error, it returns -1 and "
"sets I<errno> to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:211
msgid ""
"The B<sigblock>()  and B<sigsetmask>()  functions return the previous signal "
"mask."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:216
msgid "The B<sigmask>()  macro returns the signal mask for I<signum>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:221
msgid "See the ERRORS under B<sigaction>(2)  and B<sigprocmask>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:230
msgid ""
"The B<sigvec>(), B<sigblock>(), B<sigsetmask>(), and B<siggetmask>()  "
"functions are thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:234
msgid "The B<sigmask>()  macro is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:241
msgid ""
"Starting with version 2.21, the GNU C library no longer exports the "
"B<sigvec>()  function as part of the ABI.  (To ensure backward "
"compatibility, the glibc symbol versioning scheme continues to export the "
"interface to binaries linked against older versions of the library.)"
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:247
msgid ""
"All of these functions were in 4.3BSD, except B<siggetmask>(), whose origin "
"is unclear.  These functions are obsolete: do not use them in new programs."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:264
msgid ""
"On 4.3BSD, the B<signal>()  function provided reliable semantics (as when "
"calling B<sigvec>()  with I<vec.sv_mask> equal to 0).  On System V, "
"B<signal>()  provides unreliable semantics.  POSIX.1-2001 leaves these "
"aspects of B<signal>()  unspecified.  See B<signal>(2)  for further details."
msgstr ""

#. type: Plain text
#: build/C/man3/sigvec.3:282
msgid ""
"B<kill>(2), B<pause>(2), B<sigaction>(2), B<signal>(2), B<sigprocmask>(2), "
"B<raise>(3), B<sigpause>(3), B<sigset>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sigwait.3:26
#, no-wrap
msgid "SIGWAIT"
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:29
msgid "sigwait - wait for a signal"
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:34
#, no-wrap
msgid "B< int sigwait(const sigset_t *>I<set>B<, int *>I<sig>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:44
msgid "B<sigwait>(): _POSIX_C_SOURCE\\ E<gt>=\\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:56
msgid ""
"The B<sigwait>()  function suspends execution of the calling thread until "
"one of the signals specified in the signal set I<set> becomes pending.  The "
"function accepts the signal (removes it from the pending list of signals), "
"and returns the signal number in I<sig>."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:62
msgid ""
"The operation of B<sigwait>()  is the same as B<sigwaitinfo>(2), except "
"that:"
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:67
msgid ""
"B<sigwait>()  returns only the signal number, rather than a I<siginfo_t> "
"structure describing the signal."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:69
msgid "The return values of the two functions are different."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:74
msgid ""
"On success, B<sigwait>()  returns 0.  On error, it returns a positive error "
"number (listed in ERRORS)."
msgstr ""

#.  Does not occur for glibc.
#. type: Plain text
#: build/C/man3/sigwait.3:80
msgid "I<set> contains an invalid signal number."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:85
msgid "The B<sigwait>()  function is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:91
msgid "B<sigwait>()  is implemented using B<sigtimedwait>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:94
msgid "See B<pthread_sigmask>(3)."
msgstr ""

#. type: Plain text
#: build/C/man3/sigwait.3:102
msgid ""
"B<sigaction>(2), B<signalfd>(2), B<sigpending>(2), B<sigsuspend>(2), "
"B<sigwaitinfo>(2), B<sigsetops>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/sigwaitinfo.2:25
#, no-wrap
msgid "SIGWAITINFO"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:28
msgid "sigwaitinfo, sigtimedwait - synchronously wait for queued signals"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:33
#, no-wrap
msgid "B<int sigwaitinfo(const sigset_t *>I<set>B<, siginfo_t *>I<info>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:36
#, no-wrap
msgid ""
"B<int sigtimedwait(const sigset_t *>I<set>B<, siginfo_t *>I<info>B<, >\n"
"B<                 const struct timespec *>I<timeout>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:46
msgid "B<sigwaitinfo>(), B<sigtimedwait>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:56
msgid ""
"B<sigwaitinfo>()  suspends execution of the calling thread until one of the "
"signals in I<set> is pending (If one of the signals in I<set> is already "
"pending for the calling thread, B<sigwaitinfo>()  will return immediately.)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:68
msgid ""
"B<sigwaitinfo>()  removes the signal from the set of pending signals and "
"returns the signal number as its function result.  If the I<info> argument "
"is not NULL, then the buffer that it points to is used to return a structure "
"of type I<siginfo_t> (see B<sigaction>(2))  containing information about the "
"signal."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:76
msgid ""
"If multiple signals in I<set> are pending for the caller, the signal that is "
"retrieved by B<sigwaitinfo>()  is determined according to the usual ordering "
"rules; see B<signal>(7)  for further details."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:88
msgid ""
"B<sigtimedwait>()  operates in exactly the same way as B<sigwaitinfo>()  "
"except that it has an additional argument, I<timeout>, which specifies the "
"interval for which the thread is suspended waiting for a signal.  (This "
"interval will be rounded up to the system clock granularity, and kernel "
"scheduling delays mean that the interval may overrun by a small amount.)  "
"This argument is of the following type:"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:95
#, no-wrap
msgid ""
"struct timespec {\n"
"    long    tv_sec;         /* seconds */\n"
"    long    tv_nsec;        /* nanoseconds */\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:105
msgid ""
"If both fields of this structure are specified as 0, a poll is performed: "
"B<sigtimedwait>()  returns immediately, either with information about a "
"signal that was pending for the caller, or with an error if none of the "
"signals in I<set> was pending."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:114
msgid ""
"On success, both B<sigwaitinfo>()  and B<sigtimedwait>()  return a signal "
"number (i.e., a value greater than zero).  On failure both calls return -1, "
"with I<errno> set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:123
msgid ""
"No signal in I<set> was became pending within the I<timeout> period "
"specified to B<sigtimedwait>()."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:129
msgid ""
"The wait was interrupted by a signal handler; see B<signal>(7).  (This "
"handler was for a signal other than one of those in I<set>.)"
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:133
msgid "I<timeout> was invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:153
msgid ""
"In normal usage, the calling program blocks the signals in I<set> via a "
"prior call to B<sigprocmask>(2)  (so that the default disposition for these "
"signals does not occur if they become pending between successive calls to "
"B<sigwaitinfo>()  or B<sigtimedwait>())  and does not establish handlers for "
"these signals.  In a multithreaded program, the signal should be blocked in "
"all threads, in order to prevent the signal being treated according to its "
"default disposition in a thread other than the one calling B<sigwaitinfo>()  "
"or B<sigtimedwait>())."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:158
msgid ""
"The set of signals that is pending for a given thread is the union of the "
"set of signals that is pending specifically for that thread and the set of "
"signals that is pending for the process as a whole (see B<signal>(7))."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:164
msgid "Attempts to wait for B<SIGKILL> and B<SIGSTOP> are silently ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:173
msgid ""
"If multiple threads of a process are blocked waiting for the same signal(s) "
"in B<sigwaitinfo>()  or B<sigtimedwait>(), then exactly one of the threads "
"will actually receive the signal if it becomes pending for the process as a "
"whole; which of the threads receives the signal is indeterminate."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:183
msgid ""
"POSIX leaves the meaning of a NULL value for the I<timeout> argument of "
"B<sigtimedwait>()  unspecified, permitting the possibility that this has the "
"same meaning as a call to B<sigwaitinfo>(), and indeed this is what is done "
"on Linux."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:188
msgid ""
"On Linux, B<sigwaitinfo>()  is a library function implemented on top of "
"B<sigtimedwait>()."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:201
msgid ""
"The raw B<sigtimedwait>()  system call has a fifth argument, I<size_t "
"sigsetsize>, which specifies the size in bytes of the I<set> argument.  The "
"glibc B<sigtimedwait>()  wrapper function specifies this argument as a fixed "
"value (equal to I<sizeof(sigset_t)>)."
msgstr ""

#. type: Plain text
#: build/C/man2/sigwaitinfo.2:213
msgid ""
"B<kill>(2), B<sigaction>(2), B<signal>(2), B<signalfd>(2), B<sigpending>(2), "
"B<sigprocmask>(2), B<sigqueue>(3), B<sigsetops>(3), B<sigwait>(3), "
"B<signal>(7), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man3/sysv_signal.3:25
#, no-wrap
msgid "SYSV_SIGNAL"
msgstr ""

#. type: TH
#: build/C/man3/sysv_signal.3:25
#, no-wrap
msgid "2014-01-06"
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:28
msgid "sysv_signal - signal handling with System V semantics"
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:30
msgid "B<#define _GNU_SOURCE> /* See feature_test_macros(7) */"
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:36
msgid "B<sighandler_t sysv_signal(int >I<signum>B<, sighandler_t >I<handler>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:41
msgid ""
"The B<sysv_signal>()  function takes the same arguments, and performs the "
"same task, as B<signal>(2)."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:51
msgid ""
"However B<sysv_signal>()  provides the System V unreliable signal semantics, "
"that is: a) the disposition of the signal is reset to the default when the "
"handler is invoked; b) delivery of further instances of the signal is not "
"blocked while the signal handler is executing; and c) if the handler "
"interrupts (certain) blocking system calls, then the system call is not "
"automatically restarted."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:57
msgid ""
"The B<sysv_signal>()  function returns the previous value of the signal "
"handler, or B<SIG_ERR> on error."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:65
msgid "The B<sysv_signal>()  function is thread-safe."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:67
msgid "This function is nonstandard."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:73
msgid "Use of B<sysv_signal>()  should be avoided; use B<sigaction>(2)  instead."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:84
msgid ""
"On older Linux systems, B<sysv_signal>()  and B<signal>(2)  were "
"equivalent.  But on newer systems, B<signal>(2)  provides reliable signal "
"semantics; see B<signal>(2)  for details."
msgstr ""

#. type: Plain text
#: build/C/man3/sysv_signal.3:97
msgid "B<sigaction>(2), B<signal>(2), B<bsd_signal>(3), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/timer_create.2:33
#, no-wrap
msgid "TIMER_CREATE"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:36
msgid "timer_create - create a POSIX per-process timer"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:40
#, no-wrap
msgid ""
"B<#include E<lt>signal.hE<gt>>\n"
"B<#include E<lt>time.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:43
#, no-wrap
msgid ""
"B<int timer_create(clockid_t >I<clockid>B<, struct sigevent *>I<sevp>B<,>\n"
"B<                 timer_t *>I<timerid>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:46 build/C/man2/timer_delete.2:37 build/C/man2/timer_getoverrun.2:37 build/C/man2/timer_settime.2:41
msgid "Link with I<-lrt>."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:54
msgid "B<timer_create>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:62
msgid ""
"B<timer_create>()  creates a new per-process interval timer.  The ID of the "
"new timer is returned in the buffer pointed to by I<timerid>, which must be "
"a non-null pointer.  This ID is unique within the process, until the timer "
"is deleted.  The new timer is initially disarmed."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:67
msgid ""
"The I<clockid> argument specifies the clock that the new timer uses to "
"measure time.  It can be specified as one of the following values:"
msgstr ""

#. type: TP
#: build/C/man2/timer_create.2:67
#, no-wrap
msgid "B<CLOCK_REALTIME>"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:70
msgid "A settable system-wide real-time clock."
msgstr ""

#. type: TP
#: build/C/man2/timer_create.2:70
#, no-wrap
msgid "B<CLOCK_MONOTONIC>"
msgstr ""

#.  Note: the CLOCK_MONOTONIC_RAW clock added for clock_gettime()
#.  in 2.6.28 is not supported for POSIX timers -- mtk, Feb 2009
#. type: Plain text
#: build/C/man2/timer_create.2:77
msgid ""
"A nonsettable monotonically increasing clock that measures time from some "
"unspecified point in the past that does not change after system startup."
msgstr ""

#. type: TP
#: build/C/man2/timer_create.2:77
#, no-wrap
msgid "B<CLOCK_PROCESS_CPUTIME_ID> (since Linux 2.6.12)"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:81
msgid ""
"A clock that measures (user and system) CPU time consumed by (all of the "
"threads in) the calling process."
msgstr ""

#. type: TP
#: build/C/man2/timer_create.2:81
#, no-wrap
msgid "B<CLOCK_THREAD_CPUTIME_ID> (since Linux 2.6.12)"
msgstr ""

#.  The CLOCK_MONOTONIC_RAW that was added in 2.6.28 can't be used
#.  to create a timer -- mtk, Feb 2009
#. type: Plain text
#: build/C/man2/timer_create.2:87
msgid ""
"A clock that measures (user and system) CPU time consumed by the calling "
"thread."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:96
msgid ""
"As well as the above values, I<clockid> can be specified as the I<clockid> "
"returned by a call to B<clock_getcpuclockid>(3)  or "
"B<pthread_getcpuclockid>(3)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:105
msgid ""
"The I<sevp> argument points to a I<sigevent> structure that specifies how "
"the caller should be notified when the timer expires.  For the definition "
"and general details of this structure, see B<sigevent>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:109
msgid "The I<sevp.sigev_notify> field can have the following values:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:114
msgid ""
"Don't asynchronously notify when the timer expires.  Progress of the timer "
"can be monitored using B<timer_gettime>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:132
msgid ""
"Upon timer expiration, generate the signal I<sigev_signo> for the process.  "
"See B<sigevent>(7)  for general details.  The I<si_code> field of the "
"I<siginfo_t> structure will be set to B<SI_TIMER>.  At any point in time, at "
"most one signal is queued to the process for a given timer; see "
"B<timer_getoverrun>(2)  for more details."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:140
msgid ""
"Upon timer expiration, invoke I<sigev_notify_function> as if it were the "
"start function of a new thread.  See B<sigevent>(7)  for details."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:154
msgid ""
"As for B<SIGEV_SIGNAL>, but the signal is targeted at the thread whose ID is "
"given in I<sigev_notify_thread_id>, which must be a thread in the same "
"process as the caller.  The I<sigev_notify_thread_id> field specifies a "
"kernel thread ID, that is, the value returned by B<clone>(2)  or "
"B<gettid>(2).  This flag is intended only for use by threading libraries."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:169
msgid ""
"Specifying I<sevp> as NULL is equivalent to specifying a pointer to a "
"I<sigevent> structure in which I<sigev_notify> is B<SIGEV_SIGNAL>, "
"I<sigev_signo> is B<SIGALRM>, and I<sigev_value.sival_int> is the timer ID."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:177
msgid ""
"On success, B<timer_create>()  returns 0, and the ID of the new timer is "
"placed in I<*timerid>.  On failure, -1 is returned, and I<errno> is set to "
"indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:181
msgid "Temporary error during kernel allocation of timer structures."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:189
msgid ""
"Clock ID, I<sigev_notify>, I<sigev_signo>, or I<sigev_notify_thread_id> is "
"invalid."
msgstr ""

#.  glibc layer: malloc()
#. type: Plain text
#: build/C/man2/timer_create.2:193
msgid "Could not allocate memory."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:195 build/C/man2/timer_delete.2:67 build/C/man2/timer_getoverrun.2:97
msgid "This system call is available since Linux 2.6."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:200
msgid "A program may create multiple interval timers using B<timer_create>()."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:205
msgid ""
"Timers are not inherited by the child of a B<fork>(2), and are disarmed and "
"deleted during an B<execve>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:213
msgid ""
"The kernel preallocates a \"queued real-time signal\" for each timer created "
"using B<timer_create>().  Consequently, the number of timers is limited by "
"the B<RLIMIT_SIGPENDING> resource limit (see B<setrlimit>(2))."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:218
msgid ""
"The timers created by B<timer_create>()  are commonly known as \"POSIX "
"(interval) timers\".  The POSIX timers API consists of the following "
"interfaces:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:221
msgid "B<timer_create>(): Create a timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:224
msgid "B<timer_settime>(2): Arm (start) or disarm (stop) a timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:228
msgid ""
"B<timer_gettime>(2): Fetch the time remaining until the next expiration of a "
"timer, along with the interval setting of the timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:231
msgid ""
"B<timer_getoverrun>(2): Return the overrun count for the last timer "
"expiration."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:234
msgid "B<timer_delete>(2): Disarm and delete a timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:243
msgid ""
"Since Linux 3.10, the I</proc/[pid]/timers> file can be used to list the "
"POSIX timers for the process with PID I<pid>.  See B<proc>(5)  for further "
"information."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:246
msgid ""
"Part of the implementation of the POSIX timers API is provided by glibc.  In "
"particular:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:250
msgid ""
"The functionality for B<SIGEV_THREAD> is implemented within glibc, rather "
"than the kernel."
msgstr ""

#.  See the glibc source file kernel-posix-timers.h for the structure
#.  that glibc uses to map user-space timer IDs to kernel timer IDs
#.  The kernel-level timer ID is exposed via siginfo.si_tid.
#. type: Plain text
#: build/C/man2/timer_create.2:256
msgid ""
"The timer IDs presented at user level are maintained by glibc, which maps "
"these IDs to the timer IDs employed by the kernel."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:264
msgid ""
"The POSIX timers system calls first appeared in Linux 2.6.  Prior to this, "
"glibc provided an incomplete user-space implementation (B<CLOCK_REALTIME> "
"timers only) using POSIX threads, and current glibc falls back to this "
"implementation on systems running pre-2.6 Linux kernels."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:276
msgid ""
"The program below takes two arguments: a sleep period in seconds, and a "
"timer frequency in nanoseconds.  The program establishes a handler for the "
"signal it uses for the timer, blocks that signal, creates and arms a timer "
"that expires with the given frequency, sleeps for the specified number of "
"seconds, and then unblocks the timer signal.  Assuming that the timer "
"expired at least once while the program slept, the signal handler will be "
"invoked, and the handler displays some information about the timer "
"notification.  The program terminates after one invocation of the signal "
"handler."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:281
msgid ""
"In the following example run, the program sleeps for 1 second, after "
"creating a timer that has a frequency of 100 nanoseconds.  By the time the "
"signal is unblocked and delivered, there have been around ten million "
"overruns."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:293
#, no-wrap
msgid ""
"$ B<./a.out 1 100>\n"
"Establishing handler for signal 34\n"
"Blocking signal 34\n"
"timer ID is 0x804c008\n"
"Sleeping for 1 seconds\n"
"Unblocking signal 34\n"
"Caught signal 34\n"
"    sival_ptr = 0xbfb174f4;     *sival_ptr = 0x804c008\n"
"    overrun count = 10004886\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:303
#, no-wrap
msgid ""
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
"#include E<lt>signal.hE<gt>\n"
"#include E<lt>time.hE<gt>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:306
#, no-wrap
msgid ""
"#define CLOCKID CLOCK_REALTIME\n"
"#define SIG SIGRTMIN\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:309
#, no-wrap
msgid ""
"#define errExit(msg)    do { perror(msg); exit(EXIT_FAILURE); \\e\n"
"                        } while (0)\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:315
#, no-wrap
msgid ""
"static void\n"
"print_siginfo(siginfo_t *si)\n"
"{\n"
"    timer_t *tidp;\n"
"    int or;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:317
#, no-wrap
msgid "    tidp = si-E<gt>si_value.sival_ptr;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:320
#, no-wrap
msgid ""
"    printf(\"    sival_ptr = %p; \", si-E<gt>si_value.sival_ptr);\n"
"    printf(\"    *sival_ptr = 0x%lx\\en\", (long) *tidp);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:327
#, no-wrap
msgid ""
"    or = timer_getoverrun(*tidp);\n"
"    if (or == -1)\n"
"        errExit(\"timer_getoverrun\");\n"
"    else\n"
"        printf(\"    overrun count = %d\\en\", or);\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:334
#, no-wrap
msgid ""
"static void\n"
"handler(int sig, siginfo_t *si, void *uc)\n"
"{\n"
"    /* Note: calling printf() from a signal handler is not\n"
"       strictly correct, since printf() is not async-signal-safe;\n"
"       see signal(7) */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:339
#, no-wrap
msgid ""
"    printf(\"Caught signal %d\\en\", sig);\n"
"    print_siginfo(si);\n"
"    signal(sig, SIG_IGN);\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:349
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
"    timer_t timerid;\n"
"    struct sigevent sev;\n"
"    struct itimerspec its;\n"
"    long long freq_nanosecs;\n"
"    sigset_t mask;\n"
"    struct sigaction sa;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:355
#, no-wrap
msgid ""
"    if (argc != 3) {\n"
"        fprintf(stderr, \"Usage: %s E<lt>sleep-secsE<gt> "
"E<lt>freq-nanosecsE<gt>\\en\",\n"
"                argv[0]);\n"
"        exit(EXIT_FAILURE);\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:357
#, no-wrap
msgid "    /* Establish handler for timer signal */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:364
#, no-wrap
msgid ""
"    printf(\"Establishing handler for signal %d\\en\", SIG);\n"
"    sa.sa_flags = SA_SIGINFO;\n"
"    sa.sa_sigaction = handler;\n"
"    sigemptyset(&sa.sa_mask);\n"
"    if (sigaction(SIG, &sa, NULL) == -1)\n"
"        errExit(\"sigaction\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:366
#, no-wrap
msgid "    /* Block timer signal temporarily */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:372
#, no-wrap
msgid ""
"    printf(\"Blocking signal %d\\en\", SIG);\n"
"    sigemptyset(&mask);\n"
"    sigaddset(&mask, SIG);\n"
"    if (sigprocmask(SIG_SETMASK, &mask, NULL) == -1)\n"
"        errExit(\"sigprocmask\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:374
#, no-wrap
msgid "    /* Create the timer */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:380
#, no-wrap
msgid ""
"    sev.sigev_notify = SIGEV_SIGNAL;\n"
"    sev.sigev_signo = SIG;\n"
"    sev.sigev_value.sival_ptr = &timerid;\n"
"    if (timer_create(CLOCKID, &sev, &timerid) == -1)\n"
"        errExit(\"timer_create\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:382
#, no-wrap
msgid "    printf(\"timer ID is 0x%lx\\en\", (long) timerid);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:384
#, no-wrap
msgid "    /* Start the timer */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:390
#, no-wrap
msgid ""
"    freq_nanosecs = atoll(argv[2]);\n"
"    its.it_value.tv_sec = freq_nanosecs / 1000000000;\n"
"    its.it_value.tv_nsec = freq_nanosecs % 1000000000;\n"
"    its.it_interval.tv_sec = its.it_value.tv_sec;\n"
"    its.it_interval.tv_nsec = its.it_value.tv_nsec;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:393
#, no-wrap
msgid ""
"    if (timer_settime(timerid, 0, &its, NULL) == -1)\n"
"         errExit(\"timer_settime\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:396
#, no-wrap
msgid ""
"    /* Sleep for a while; meanwhile, the timer may expire\n"
"       multiple times */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:399
#, no-wrap
msgid ""
"    printf(\"Sleeping for %d seconds\\en\", atoi(argv[1]));\n"
"    sleep(atoi(argv[1]));\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:402
#, no-wrap
msgid ""
"    /* Unlock the timer signal, so that timer notification\n"
"       can be delivered */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:406
#, no-wrap
msgid ""
"    printf(\"Unblocking signal %d\\en\", SIG);\n"
"    if (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1)\n"
"        errExit(\"sigprocmask\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:409 build/C/man2/timerfd_create.2:547
#, no-wrap
msgid ""
"    exit(EXIT_SUCCESS);\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_create.2:425
msgid ""
"B<clock_gettime>(2), B<setitimer>(2), B<timer_delete>(2), "
"B<timer_getoverrun>(2), B<timer_settime>(2), B<timerfd_create>(2), "
"B<clock_getcpuclockid>(3), B<pthread_getcpuclockid>(3), B<pthreads>(7), "
"B<sigevent>(7), B<signal>(7), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man2/timer_delete.2:26
#, no-wrap
msgid "TIMER_DELETE"
msgstr ""

#. type: TH
#: build/C/man2/timer_delete.2:26 build/C/man2/timer_getoverrun.2:26
#, no-wrap
msgid "2009-02-20"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:29
msgid "timer_delete - delete a POSIX per-process timer"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:32 build/C/man2/timer_getoverrun.2:32 build/C/man2/timer_settime.2:33
#, no-wrap
msgid "B<#include E<lt>time.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:34
#, no-wrap
msgid "B<int timer_delete(timer_t >I<timerid>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:45
msgid "B<timer_delete>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:53
msgid ""
"B<timer_delete>()  deletes the timer whose ID is given in I<timerid>.  If "
"the timer was armed at the time of this call, it is disarmed before being "
"deleted.  The treatment of any pending signal generated by the deleted timer "
"is unspecified."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:60
msgid ""
"On success, B<timer_delete>()  returns 0.  On failure, -1 is returned, and "
"I<errno> is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:65 build/C/man2/timer_getoverrun.2:95
msgid "I<timerid> is not a valid timer ID."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_delete.2:75
msgid ""
"B<clock_gettime>(2), B<timer_create>(2), B<timer_getoverrun>(2), "
"B<timer_settime>(2), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man2/timer_getoverrun.2:26
#, no-wrap
msgid "TIMER_GETOVERRUN"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:29
msgid "timer_getoverrun - get overrun count for a POSIX per-process timer"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:34
#, no-wrap
msgid "B<int timer_getoverrun(timer_t >I<timerid>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:45
msgid "B<timer_getoverrun>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:56
msgid ""
"B<timer_getoverrun>()  returns the \"overrun count\" for the timer referred "
"to by I<timerid>.  An application can use the overrun count to accurately "
"calculate the number of timer expirations that would have occurred over a "
"given time interval.  Timer overruns can occur both when receiving "
"expiration notifications via signals (B<SIGEV_SIGNAL>), and via threads "
"(B<SIGEV_THREAD>)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:76
msgid ""
"When expiration notifications are delivered via a signal, overruns can occur "
"as follows.  Regardless of whether or not a real-time signal is used for "
"timer notifications, the system queues at most one signal per timer.  (This "
"is the behavior specified by POSIX.1-2001.  The alternative, queuing one "
"signal for each timer expiration, could easily result in overflowing the "
"allowed limits for queued signals on the system.)  Because of system "
"scheduling delays, or because the signal may be temporarily blocked, there "
"can be a delay between the time when the notification signal is generated "
"and the time when it is delivered (e.g., caught by a signal handler) or "
"accepted (e.g., using B<sigwaitinfo>(2)).  In this interval, further timer "
"expirations may occur.  The timer overrun count is the number of additional "
"timer expirations that occurred between the time when the signal was "
"generated and when it was delivered or accepted."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:82
msgid ""
"Timer overruns can also occur when expiration notifications are delivered "
"via invocation of a thread, since there may be an arbitrary delay between an "
"expiration of the timer and the invocation of the notification thread, and "
"in that delay interval, additional timer expirations may occur."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:90
msgid ""
"On success, B<timer_getoverrun>()  returns the overrun count of the "
"specified timer; this count may be 0 if no overruns have occurred.  On "
"failure, -1 is returned, and I<errno> is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:111
msgid ""
"When timer notifications are delivered via signals (B<SIGEV_SIGNAL>), on "
"Linux it is also possible to obtain the overrun count via the I<si_overrun> "
"field of the I<siginfo_t> structure (see B<sigaction>(2)).  This allows an "
"application to avoid the overhead of making a system call to obtain the "
"overrun count, but is a nonportable extension to POSIX.1-2001."
msgstr ""

#.  FIXME . Austin bug filed, 11 Feb 09
#. type: Plain text
#: build/C/man2/timer_getoverrun.2:115
msgid ""
"POSIX.1-2001 discusses timer overruns only in the context of timer "
"notifications using signals."
msgstr ""

#.  Bug filed: http://bugzilla.kernel.org/show_bug.cgi?id=12665
#.  http://thread.gmane.org/gmane.linux.kernel/113276/
#. type: Plain text
#: build/C/man2/timer_getoverrun.2:128
msgid ""
"POSIX.1-2001 specifies that if the timer overrun count is equal to or "
"greater than an implementation-defined maximum, B<DELAYTIMER_MAX>, then "
"B<timer_getoverrun>()  should return B<DELAYTIMER_MAX>.  However, Linux does "
"not implement this feature: instead, if the timer overrun value exceeds the "
"maximum representable integer, the counter cycles, starting once more from "
"low values."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:131 build/C/man2/timer_settime.2:212
msgid "See B<timer_create>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_getoverrun.2:141
msgid ""
"B<clock_gettime>(2), B<sigaction>(2), B<signalfd>(2), B<sigwaitinfo>(2), "
"B<timer_create>(2), B<timer_delete>(2), B<timer_settime>(2), B<signal>(7), "
"B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man2/timer_settime.2:26
#, no-wrap
msgid "TIMER_SETTIME"
msgstr ""

#. type: TH
#: build/C/man2/timer_settime.2:26
#, no-wrap
msgid "2012-10-15"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:30
msgid ""
"timer_settime, timer_gettime - arm/disarm and fetch state of POSIX "
"per-process timer"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:38
#, no-wrap
msgid ""
"B<int timer_settime(timer_t >I<timerid>B<, int >I<flags>B<,>\n"
"B<                  const struct itimerspec *>I<new_value>B<,>\n"
"B<                  struct itimerspec *>I<old_value>B<);>\n"
"B<int timer_gettime(timer_t >I<timerid>B<, struct itimerspec "
"*>I<curr_value>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:50
msgid "B<timer_settime>(), B<timer_gettime>(): _POSIX_C_SOURCE\\ E<gt>=\\ 199309L"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:63
msgid ""
"B<timer_settime>()  arms or disarms the timer identified by I<timerid>.  The "
"I<new_value> argument is pointer to an I<itimerspec> structure that "
"specifies the new initial value and the new interval for the timer.  The "
"I<itimerspec> structure is defined as follows:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:70 build/C/man2/timerfd_create.2:135
#, no-wrap
msgid ""
"struct timespec {\n"
"    time_t tv_sec;                /* Seconds */\n"
"    long   tv_nsec;               /* Nanoseconds */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:75
#, no-wrap
msgid ""
"struct itimerspec {\n"
"    struct timespec it_interval;  /* Timer interval */\n"
"    struct timespec it_value;     /* Initial expiration */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:87
msgid ""
"Each of the substructures of the I<itimerspec> structure is a I<timespec> "
"structure that allows a time value to be specified in seconds and "
"nanoseconds.  These time values are measured according to the clock that was "
"specified when the timer was created by B<timer_create>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:101
msgid ""
"If I<new_value-E<gt>it_value> specifies a nonzero value (i.e., either "
"subfield is nonzero), then B<timer_settime>()  arms (starts) the timer, "
"setting it to initially expire at the given time.  (If the timer was already "
"armed, then the previous settings are overwritten.)  If "
"I<new_value-E<gt>it_value> specifies a zero value (i.e., both subfields are "
"zero), then the timer is disarmed."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:113
msgid ""
"The I<new_value-E<gt>it_interval> field specifies the period of the timer, "
"in seconds and nanoseconds.  If this field is nonzero, then each time that "
"an armed timer expires, the timer is reloaded from the value specified in "
"I<new_value-E<gt>it_interval>.  If I<new_value-E<gt>it_interval> specifies a "
"zero value, then the timer expires just once, at the time specified by "
"I<it_value>."
msgstr ""

#.  By experiment: the overrun count is set correctly, for CLOCK_REALTIME.
#. type: Plain text
#: build/C/man2/timer_settime.2:134
msgid ""
"By default, the initial expiration time specified in "
"I<new_value-E<gt>it_value> is interpreted relative to the current time on "
"the timer's clock at the time of the call.  This can be modified by "
"specifying B<TIMER_ABSTIME> in I<flags>, in which case "
"I<new_value-E<gt>it_value> is interpreted as an absolute value as measured "
"on the timer's clock; that is, the timer will expire when the clock value "
"reaches the value specified by I<new_value-E<gt>it_value>.  If the specified "
"absolute time has already passed, then the timer expires immediately, and "
"the overrun count (see B<timer_getoverrun>(2))  will be set correctly."
msgstr ""

#.  Similar remarks might apply with respect to process and thread CPU time
#.  clocks, but these clocks are not currently (2.6.28) settable on Linux.
#. type: Plain text
#: build/C/man2/timer_settime.2:144
msgid ""
"If the value of the B<CLOCK_REALTIME> clock is adjusted while an absolute "
"timer based on that clock is armed, then the expiration of the timer will be "
"appropriately adjusted.  Adjustments to the B<CLOCK_REALTIME> clock have no "
"effect on relative timers based on that clock."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:153
msgid ""
"If I<old_value> is not NULL, then it points to a buffer that is used to "
"return the previous interval of the timer (in I<old_value-E<gt>it_interval>)  "
"and the amount of time until the timer would previously have next expired "
"(in I<old_value-E<gt>it_value>)."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:173
msgid ""
"B<timer_gettime>()  returns the time until next expiration, and the "
"interval, for the timer specified by I<timerid>, in the buffer pointed to by "
"I<curr_value>.  The time remaining until the next timer expiration is "
"returned in I<curr_value-E<gt>it_value>; this is always a relative value, "
"regardless of whether the B<TIMER_ABSTIME> flag was used when arming the "
"timer.  If the value returned in I<curr_value-E<gt>it_value> is zero, then "
"the timer is currently disarmed.  The timer interval is returned in "
"I<curr_value-E<gt>it_interval>.  If the value returned in "
"I<curr_value-E<gt>it_interval> is zero, then this is a \"one-shot\" timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:182
msgid ""
"On success, B<timer_settime>()  and B<timer_gettime>()  return 0.  On error, "
"-1 is returned, and I<errno> is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:184
msgid "These functions may fail with the following errors:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:191
msgid "I<new_value>, I<old_value>, or I<curr_value> is not a valid pointer."
msgstr ""

#.  FIXME . eventually: invalid value in flags
#. type: Plain text
#: build/C/man2/timer_settime.2:196
msgid "I<timerid> is invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:199
msgid "B<timer_settime>()  may fail with the following errors:"
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:205
msgid ""
"I<new_value.it_value> is negative; or I<new_value.it_value.tv_nsec> is "
"negative or greater than 999,999,999."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:207
msgid "These system calls are available since Linux 2.6."
msgstr ""

#. type: Plain text
#: build/C/man2/timer_settime.2:216
msgid "B<timer_create>(2), B<timer_getoverrun>(2), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man2/timerfd_create.2:22
#, no-wrap
msgid "TIMERFD_CREATE"
msgstr ""

#. type: TH
#: build/C/man2/timerfd_create.2:22
#, no-wrap
msgid "2011-09-14"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:26
msgid ""
"timerfd_create, timerfd_settime, timerfd_gettime - timers that notify via "
"file descriptors"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:29
#, no-wrap
msgid "B<#include E<lt>sys/timerfd.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:31
#, no-wrap
msgid "B<int timerfd_create(int >I<clockid>B<, int >I<flags>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:35
#, no-wrap
msgid ""
"B<int timerfd_settime(int >I<fd>B<, int >I<flags>B<,>\n"
"B<                    const struct itimerspec *>I<new_value>B<,>\n"
"B<                    struct itimerspec *>I<old_value>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:37
#, no-wrap
msgid "B<int timerfd_gettime(int >I<fd>B<, struct itimerspec *>I<curr_value>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:50
msgid ""
"These system calls create and operate on a timer that delivers timer "
"expiration notifications via a file descriptor.  They provide an alternative "
"to the use of B<setitimer>(2)  or B<timer_create>(2), with the advantage "
"that the file descriptor may be monitored by B<select>(2), B<poll>(2), and "
"B<epoll>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:62
msgid ""
"The use of these three system calls is analogous to the use of "
"B<timer_create>(2), B<timer_settime>(2), and B<timer_gettime>(2).  (There is "
"no analog of B<timer_getoverrun>(2), since that functionality is provided by "
"B<read>(2), as described below.)"
msgstr ""

#. type: SS
#: build/C/man2/timerfd_create.2:62
#, no-wrap
msgid "timerfd_create()"
msgstr ""

#.  FIXME
#.  Additional clocks are now supported:
#.  CLOCK_REALTIME_ALARM and CLOCK_BOOTTIME_ALARM
#.     Since Linux 3.11, commit 11ffa9d6065f344a9bd769a2452f26f2f671e5f8
#.  CLOCK_BOOTTIME
#.     Since Linux 3.15, commit 4a2378a943f09907fb1ae35c15de917f60289c14
#. type: Plain text
#: build/C/man2/timerfd_create.2:87
msgid ""
"B<timerfd_create>()  creates a new timer object, and returns a file "
"descriptor that refers to that timer.  The I<clockid> argument specifies the "
"clock that is used to mark the progress of the timer, and must be either "
"B<CLOCK_REALTIME> or B<CLOCK_MONOTONIC>.  B<CLOCK_REALTIME> is a settable "
"system-wide clock.  B<CLOCK_MONOTONIC> is a nonsettable clock that is not "
"affected by discontinuous changes in the system clock (e.g., manual changes "
"to system time).  The current value of each of these clocks can be retrieved "
"using B<clock_gettime>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:92
msgid ""
"Starting with Linux 2.6.27, the following values may be bitwise ORed in "
"I<flags> to change the behavior of B<timerfd_create>():"
msgstr ""

#. type: TP
#: build/C/man2/timerfd_create.2:92
#, no-wrap
msgid "B<TFD_NONBLOCK>"
msgstr ""

#. type: TP
#: build/C/man2/timerfd_create.2:100
#, no-wrap
msgid "B<TFD_CLOEXEC>"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:114
msgid ""
"In Linux versions up to and including 2.6.26, I<flags> must be specified as "
"zero."
msgstr ""

#. type: SS
#: build/C/man2/timerfd_create.2:114
#, no-wrap
msgid "timerfd_settime()"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:119
msgid ""
"B<timerfd_settime>()  arms (starts) or disarms (stops)  the timer referred "
"to by the file descriptor I<fd>."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:128
msgid ""
"The I<new_value> argument specifies the initial expiration and interval for "
"the timer.  The I<itimer> structure used for this argument contains two "
"fields, each of which is in turn a structure of type I<timespec>:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:140
#, no-wrap
msgid ""
"struct itimerspec {\n"
"    struct timespec it_interval;  /* Interval for periodic timer */\n"
"    struct timespec it_value;     /* Initial expiration */\n"
"};\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:152
msgid ""
"I<new_value.it_value> specifies the initial expiration of the timer, in "
"seconds and nanoseconds.  Setting either field of I<new_value.it_value> to a "
"nonzero value arms the timer.  Setting both fields of I<new_value.it_value> "
"to zero disarms the timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:161
msgid ""
"Setting one or both fields of I<new_value.it_interval> to nonzero values "
"specifies the period, in seconds and nanoseconds, for repeated timer "
"expirations after the initial expiration.  If both fields of "
"I<new_value.it_interval> are zero, the timer expires just once, at the time "
"specified by I<new_value.it_value>."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:177
msgid ""
"The I<flags> argument is either 0, to start a relative timer "
"(I<new_value.it_value> specifies a time relative to the current value of the "
"clock specified by I<clockid>), or B<TFD_TIMER_ABSTIME>, to start an "
"absolute timer (I<new_value.it_value> specifies an absolute time for the "
"clock specified by I<clockid>; that is, the timer will expire when the value "
"of that clock reaches the value specified in I<new_value.it_value>)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:188
msgid ""
"If the I<old_value> argument is not NULL, then the I<itimerspec> structure "
"that it points to is used to return the setting of the timer that was "
"current at the time of the call; see the description of B<timerfd_gettime>()  "
"following."
msgstr ""

#. type: SS
#: build/C/man2/timerfd_create.2:188
#, no-wrap
msgid "timerfd_gettime()"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:197
msgid ""
"B<timerfd_gettime>()  returns, in I<curr_value>, an I<itimerspec> structure "
"that contains the current setting of the timer referred to by the file "
"descriptor I<fd>."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:207
msgid ""
"The I<it_value> field returns the amount of time until the timer will next "
"expire.  If both fields of this structure are zero, then the timer is "
"currently disarmed.  This field always contains a relative value, regardless "
"of whether the B<TFD_TIMER_ABSTIME> flag was specified when setting the "
"timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:214
msgid ""
"The I<it_interval> field returns the interval of the timer.  If both fields "
"of this structure are zero, then the timer is set to expire just once, at "
"the time specified by I<curr_value.it_value>."
msgstr ""

#. type: SS
#: build/C/man2/timerfd_create.2:214
#, no-wrap
msgid "Operating on a timer file descriptor"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:218
msgid ""
"The file descriptor returned by B<timerfd_create>()  supports the following "
"operations:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:232
msgid ""
"If the timer has already expired one or more times since its settings were "
"last modified using B<timerfd_settime>(), or since the last successful "
"B<read>(2), then the buffer given to B<read>(2)  returns an unsigned 8-byte "
"integer (I<uint64_t>)  containing the number of expirations that have "
"occurred.  (The returned value is in host byte order\\(emthat is, the native "
"byte order for integers on the host machine.)"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:245
msgid ""
"If no timer expirations have occurred at the time of the B<read>(2), then "
"the call either blocks until the next timer expiration, or fails with the "
"error B<EAGAIN> if the file descriptor has been made nonblocking (via the "
"use of the B<fcntl>(2)  B<F_SETFL> operation to set the B<O_NONBLOCK> flag)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:251
msgid ""
"A B<read>(2)  will fail with the error B<EINVAL> if the size of the supplied "
"buffer is less than 8 bytes."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:262
msgid ""
"The file descriptor is readable (the B<select>(2)  I<readfds> argument; the "
"B<poll>(2)  B<POLLIN> flag)  if one or more timer expirations have occurred."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:269
msgid ""
"The file descriptor also supports the other file-descriptor multiplexing "
"APIs: B<pselect>(2), B<ppoll>(2), and B<epoll>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:276
msgid ""
"When the file descriptor is no longer required it should be closed.  When "
"all file descriptors associated with the same timer object have been closed, "
"the timer is disarmed and its resources are freed by the kernel."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:288
msgid ""
"After a B<fork>(2), the child inherits a copy of the file descriptor created "
"by B<timerfd_create>().  The file descriptor refers to the same underlying "
"timer object as the corresponding file descriptor in the parent, and "
"B<read>(2)s in the child will return information about expirations of the "
"timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:294
msgid ""
"A file descriptor created by B<timerfd_create>()  is preserved across "
"B<execve>(2), and continues to generate timer expirations if the timer was "
"armed."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:301
msgid ""
"On success, B<timerfd_create>()  returns a new file descriptor.  On error, "
"-1 is returned and I<errno> is set to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:309
msgid ""
"B<timerfd_settime>()  and B<timerfd_gettime>()  return 0 on success; on "
"error they return -1, and set I<errno> to indicate the error."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:312
msgid "B<timerfd_create>()  can fail with the following errors:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:320
msgid "The I<clockid> argument is neither B<CLOCK_MONOTONIC> nor B<CLOCK_REALTIME>;"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:340
msgid "There was insufficient kernel memory to create the timer."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:345
msgid ""
"B<timerfd_settime>()  and B<timerfd_gettime>()  can fail with the following "
"errors:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:349
msgid "I<fd> is not a valid file descriptor."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:360
msgid "I<fd> is not a valid timerfd file descriptor."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:363
msgid "B<timerfd_settime>()  can also fail with the following errors:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:369
msgid ""
"I<new_value> is not properly initialized (one of the I<tv_nsec> falls "
"outside the range zero to 999,999,999)."
msgstr ""

#.  This case only checked since 2.6.29, and 2.2.2[78].some-stable-version.
#.  In older kernel versions, no check was made for invalid flags.
#. type: Plain text
#: build/C/man2/timerfd_create.2:375
msgid "I<flags> is invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:378
msgid ""
"These system calls are available on Linux since kernel 2.6.25.  Library "
"support is provided by glibc since version 2.8."
msgstr ""

#.  2.6.29
#. type: Plain text
#: build/C/man2/timerfd_create.2:386
msgid ""
"Currently, B<timerfd_create>()  supports fewer types of clock IDs than "
"B<timer_create>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:395
msgid ""
"The following program creates a timer and then monitors its progress.  The "
"program accepts up to three command-line arguments.  The first argument "
"specifies the number of seconds for the initial expiration of the timer.  "
"The second argument specifies the interval for the timer, in seconds.  The "
"third argument specifies the number of times the program should allow the "
"timer to expire before terminating.  The second and third command-line "
"arguments are optional."
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:397 build/C/man2/wait.2:571
msgid "The following shell session demonstrates the use of the program:"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:412
#, no-wrap
msgid ""
"$B< a.out 3 1 100>\n"
"0.000: timer started\n"
"3.000: read: 1; total=1\n"
"4.000: read: 1; total=2\n"
"B<^Z >                 # type control-Z to suspend the program\n"
"[1]+  Stopped                 ./timerfd3_demo 3 1 100\n"
"$ B<fg>                # Resume execution after a few seconds\n"
"a.out 3 1 100\n"
"9.660: read: 5; total=7\n"
"10.000: read: 1; total=8\n"
"11.000: read: 1; total=9\n"
"B<^C >                 # type control-C to suspend the program\n"
msgstr ""

#.  The commented out code here is what we currently need until
#.  the required stuff is in glibc
#
#
#. /* Link with -lrt */
#. #define _GNU_SOURCE
#. #include <sys/syscall.h>
#. #include <unistd.h>
#. #include <time.h>
#. #if defined(__i386__)
#. #define __NR_timerfd_create 322
#. #define __NR_timerfd_settime 325
#. #define __NR_timerfd_gettime 326
#. #endif
#
#. static int
#. timerfd_create(int clockid, int flags)
#. {
#.     return syscall(__NR_timerfd_create, clockid, flags);
#. }
#
#. static int
#. timerfd_settime(int fd, int flags, struct itimerspec *new_value,
#.         struct itimerspec *curr_value)
#. {
#.     return syscall(__NR_timerfd_settime, fd, flags, new_value,
#.                    curr_value);
#. }
#
#. static int
#. timerfd_gettime(int fd, struct itimerspec *curr_value)
#. {
#.     return syscall(__NR_timerfd_gettime, fd, curr_value);
#. }
#
#. #define TFD_TIMER_ABSTIME (1 << 0)
#
#. ////////////////////////////////////////////////////////////
#. type: Plain text
#: build/C/man2/timerfd_create.2:461
#, no-wrap
msgid ""
"#include E<lt>sys/timerfd.hE<gt>\n"
"#include E<lt>time.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
"#include E<lt>stdint.hE<gt>        /* Definition of uint64_t */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:464
#, no-wrap
msgid ""
"#define handle_error(msg) \\e\n"
"        do { perror(msg); exit(EXIT_FAILURE); } while (0)\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:472
#, no-wrap
msgid ""
"static void\n"
"print_elapsed_time(void)\n"
"{\n"
"    static struct timespec start;\n"
"    struct timespec curr;\n"
"    static int first_call = 1;\n"
"    int secs, nsecs;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:478
#, no-wrap
msgid ""
"    if (first_call) {\n"
"        first_call = 0;\n"
"        if (clock_gettime(CLOCK_MONOTONIC, &start) == -1)\n"
"            handle_error(\"clock_gettime\");\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:481
#, no-wrap
msgid ""
"    if (clock_gettime(CLOCK_MONOTONIC, &curr) == -1)\n"
"        handle_error(\"clock_gettime\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:490
#, no-wrap
msgid ""
"    secs = curr.tv_sec - start.tv_sec;\n"
"    nsecs = curr.tv_nsec - start.tv_nsec;\n"
"    if (nsecs E<lt> 0) {\n"
"        secs--;\n"
"        nsecs += 1000000000;\n"
"    }\n"
"    printf(\"%d.%03d: \", secs, (nsecs + 500000) / 1000000);\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:499
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
"    struct itimerspec new_value;\n"
"    int max_exp, fd;\n"
"    struct timespec now;\n"
"    uint64_t exp, tot_exp;\n"
"    ssize_t s;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:505
#, no-wrap
msgid ""
"    if ((argc != 2) && (argc != 4)) {\n"
"        fprintf(stderr, \"%s init-secs [interval-secs max-exp]\\en\",\n"
"                argv[0]);\n"
"        exit(EXIT_FAILURE);\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:508
#, no-wrap
msgid ""
"    if (clock_gettime(CLOCK_REALTIME, &now) == -1)\n"
"        handle_error(\"clock_gettime\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:511
#, no-wrap
msgid ""
"    /* Create a CLOCK_REALTIME absolute timer with initial\n"
"       expiration and interval as specified in command line */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:522
#, no-wrap
msgid ""
"    new_value.it_value.tv_sec = now.tv_sec + atoi(argv[1]);\n"
"    new_value.it_value.tv_nsec = now.tv_nsec;\n"
"    if (argc == 2) {\n"
"        new_value.it_interval.tv_sec = 0;\n"
"        max_exp = 1;\n"
"    } else {\n"
"        new_value.it_interval.tv_sec = atoi(argv[2]);\n"
"        max_exp = atoi(argv[3]);\n"
"    }\n"
"    new_value.it_interval.tv_nsec = 0;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:526
#, no-wrap
msgid ""
"    fd = timerfd_create(CLOCK_REALTIME, 0);\n"
"    if (fd == -1)\n"
"        handle_error(\"timerfd_create\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:529
#, no-wrap
msgid ""
"    if (timerfd_settime(fd, TFD_TIMER_ABSTIME, &new_value, NULL) == -1)\n"
"        handle_error(\"timerfd_settime\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:532
#, no-wrap
msgid ""
"    print_elapsed_time();\n"
"    printf(\"timer started\\en\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:537
#, no-wrap
msgid ""
"    for (tot_exp = 0; tot_exp E<lt> max_exp;) {\n"
"        s = read(fd, &exp, sizeof(uint64_t));\n"
"        if (s != sizeof(uint64_t))\n"
"            handle_error(\"read\");\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:544
#, no-wrap
msgid ""
"        tot_exp += exp;\n"
"        print_elapsed_time();\n"
"        printf(\"read: %llu; total=%llu\\en\",\n"
"                (unsigned long long) exp,\n"
"                (unsigned long long) tot_exp);\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/timerfd_create.2:560
msgid ""
"B<eventfd>(2), B<poll>(2), B<read>(2), B<select>(2), B<setitimer>(2), "
"B<signalfd>(2), B<timer_create>(2), B<timer_gettime>(2), "
"B<timer_settime>(2), B<epoll>(7), B<time>(7)"
msgstr ""

#. type: TH
#: build/C/man2/tkill.2:29
#, no-wrap
msgid "TKILL"
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:32
msgid "tkill, tgkill - send a signal to a thread"
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:35
#, no-wrap
msgid "B<int tkill(int >I<tid>B<, int >I<sig>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:37
#, no-wrap
msgid "B<int tgkill(int >I<tgid>B<, int >I<tid>B<, int >I<sig>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:54
msgid ""
"B<tgkill>()  sends the signal I<sig> to the thread with the thread ID I<tid> "
"in the thread group I<tgid>.  (By contrast, B<kill>(2)  can be used to send "
"a signal only to a process (i.e., thread group)  as a whole, and the signal "
"will be delivered to an arbitrary thread within that process.)"
msgstr ""

#.  FIXME Maybe say something about the following:
#.  http://sourceware.org/bugzilla/show_bug.cgi?id=12889
#.      Rich Felker <bugdal@aerifal.cx>
#.      There is a race condition in pthread_kill: it is possible that,
#.      between the time pthread_kill reads the pid/tid from the target
#.      thread descriptor and the time it makes the tgkill syscall,
#.      the target thread terminates and the same tid gets assigned
#.      to a new thread in the same process.
#
#.      (The tgkill syscall was designed to eliminate a similar race
#.      condition in tkill, but it only succeeded in eliminating races
#.      where the tid gets reused in a different process, and does not
#.      help if the same tid gets assigned to a new thread in the
#.      same process.)
#
#.      The only solution I can see is to introduce a mutex that ensures
#.      that a thread cannot exit while pthread_kill is being called on it.
#
#.      Note that in most real-world situations, like almost all race
#.      conditions, this one will be extremely rare. To make it
#.      measurable, one could exhaust all but 1-2 available pid values,
#.      possibly by lowering the max pid parameter in /proc, forcing
#.      the same tid to be reused rapidly.
#. type: Plain text
#: build/C/man2/tkill.2:85
msgid ""
"B<tkill>()  is an obsolete predecessor to B<tgkill>().  It allows only the "
"target thread ID to be specified, which may result in the wrong thread being "
"signaled if a thread terminates and its thread ID is recycled.  Avoid using "
"this system call."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:88
msgid ""
"These are the raw system call interfaces, meant for internal thread library "
"use."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:96
msgid "An invalid thread ID, thread group ID, or signal was specified."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:101
msgid "Permission denied.  For the required permissions, see B<kill>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:104
msgid "No process with the specified thread ID (and thread group ID) exists."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:109
msgid ""
"B<tkill>()  is supported since Linux 2.4.19 / 2.5.4.  B<tgkill>()  was added "
"in Linux 2.5.75."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:115
msgid ""
"B<tkill>()  and B<tgkill>()  are Linux-specific and should not be used in "
"programs that are intended to be portable."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:121
msgid ""
"See the description of B<CLONE_THREAD> in B<clone>(2)  for an explanation of "
"thread groups."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:124
msgid ""
"Glibc does not provide wrappers for these system calls; call them using "
"B<syscall>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/tkill.2:129
msgid "B<clone>(2), B<gettid>(2), B<kill>(2), B<rt_sigqueueinfo>(2)"
msgstr ""

#. type: TH
#: build/C/man2/wait.2:49
#, no-wrap
msgid "WAIT"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:52
msgid "wait, waitpid, waitid - wait for process to change state"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:54
msgid "B<#include E<lt>sys/types.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:56
msgid "B<#include E<lt>sys/wait.hE<gt>>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:58
msgid "B<pid_t wait(int *>I<status>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:60
msgid "B<pid_t waitpid(pid_t >I<pid>B<, int *>I<status>B<, int >I<options>B<);>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:65
#, no-wrap
msgid ""
"B<int waitid(idtype_t >I<idtype>B<, id_t >I<id>B<, siginfo_t *>I<infop>B<, "
"int >I<options>B<);>\n"
"                /* This is the glibc and POSIX interface; see\n"
"                   NOTES for information on the raw system call. */\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:74
msgid "B<waitid>():"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:78
msgid ""
"_SVID_SOURCE || _XOPEN_SOURCE\\ E<gt>=\\ 500 || _XOPEN_SOURCE\\ &&\\ "
"_XOPEN_SOURCE_EXTENDED"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:93
msgid ""
"All of these system calls are used to wait for state changes in a child of "
"the calling process, and obtain information about the child whose state has "
"changed.  A state change is considered to be: the child terminated; the "
"child was stopped by a signal; or the child was resumed by a signal.  In the "
"case of a terminated child, performing a wait allows the system to release "
"the resources associated with the child; if a wait is not performed, then "
"the terminated child remains in a \"zombie\" state (see NOTES below)."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:105
msgid ""
"If a child has already changed state, then these calls return immediately.  "
"Otherwise, they block until either a child changes state or a signal handler "
"interrupts the call (assuming that system calls are not automatically "
"restarted using the B<SA_RESTART> flag of B<sigaction>(2)).  In the "
"remainder of this page, a child whose state has changed and which has not "
"yet been waited upon by one of these system calls is termed I<waitable>."
msgstr ""

#. type: SS
#: build/C/man2/wait.2:105
#, no-wrap
msgid "wait() and waitpid()"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:113
msgid ""
"The B<wait>()  system call suspends execution of the calling process until "
"one of its children terminates.  The call I<wait(&status)> is equivalent to:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:116
#, no-wrap
msgid "    waitpid(-1, &status, 0);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:130
msgid ""
"The B<waitpid>()  system call suspends execution of the calling process "
"until a child specified by I<pid> argument has changed state.  By default, "
"B<waitpid>()  waits only for terminated children, but this behavior is "
"modifiable via the I<options> argument, as described below."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:134
msgid "The value of I<pid> can be:"
msgstr ""

#. type: IP
#: build/C/man2/wait.2:134
#, no-wrap
msgid "E<lt> -1"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:138
msgid ""
"meaning wait for any child process whose process group ID is equal to the "
"absolute value of I<pid>."
msgstr ""

#. type: IP
#: build/C/man2/wait.2:138
#, no-wrap
msgid "-1"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:140
msgid "meaning wait for any child process."
msgstr ""

#. type: IP
#: build/C/man2/wait.2:140
#, no-wrap
msgid "0"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:143
msgid ""
"meaning wait for any child process whose process group ID is equal to that "
"of the calling process."
msgstr ""

#. type: IP
#: build/C/man2/wait.2:143
#, no-wrap
msgid "E<gt> 0"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:147
msgid "meaning wait for the child whose process ID is equal to the value of I<pid>."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:151
msgid "The value of I<options> is an OR of zero or more of the following constants:"
msgstr ""

#. type: TP
#: build/C/man2/wait.2:151 build/C/man2/wait.2:280
#, no-wrap
msgid "B<WNOHANG>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:154
msgid "return immediately if no child has exited."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:154
#, no-wrap
msgid "B<WUNTRACED>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:163
msgid ""
"also return if a child has stopped (but not traced via B<ptrace>(2)).  "
"Status for I<traced> children which have stopped is provided even if this "
"option is not specified."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:163
#, no-wrap
msgid "B<WCONTINUED> (since Linux 2.6.10)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:167
msgid "also return if a stopped child has been resumed by delivery of B<SIGCONT>."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:169
msgid "(For Linux-only options, see below.)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:183
msgid ""
"If I<status> is not NULL, B<wait>()  and B<waitpid>()  store status "
"information in the I<int> to which it points.  This integer can be inspected "
"with the following macros (which take the integer itself as an argument, not "
"a pointer to it, as is done in B<wait>()  and B<waitpid>()!):"
msgstr ""

#. type: TP
#: build/C/man2/wait.2:183
#, no-wrap
msgid "B<WIFEXITED(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:191
msgid ""
"returns true if the child terminated normally, that is, by calling "
"B<exit>(3)  or B<_exit>(2), or by returning from main()."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:191
#, no-wrap
msgid "B<WEXITSTATUS(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:204
msgid ""
"returns the exit status of the child.  This consists of the least "
"significant 8 bits of the I<status> argument that the child specified in a "
"call to B<exit>(3)  or B<_exit>(2)  or as the argument for a return "
"statement in main().  This macro should be employed only if B<WIFEXITED> "
"returned true."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:204
#, no-wrap
msgid "B<WIFSIGNALED(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:207
msgid "returns true if the child process was terminated by a signal."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:207
#, no-wrap
msgid "B<WTERMSIG(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:214
msgid ""
"returns the number of the signal that caused the child process to "
"terminate.  This macro should be employed only if B<WIFSIGNALED> returned "
"true."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:214
#, no-wrap
msgid "B<WCOREDUMP(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:223
msgid ""
"returns true if the child produced a core dump.  This macro should be "
"employed only if B<WIFSIGNALED> returned true.  This macro is not specified "
"in POSIX.1-2001 and is not available on some UNIX implementations (e.g., "
"AIX, SunOS).  Only use this enclosed in #ifdef WCOREDUMP ... #endif."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:223
#, no-wrap
msgid "B<WIFSTOPPED(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:230
msgid ""
"returns true if the child process was stopped by delivery of a signal; this "
"is possible only if the call was done using B<WUNTRACED> or when the child "
"is being traced (see B<ptrace>(2))."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:230
#, no-wrap
msgid "B<WSTOPSIG(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:236
msgid ""
"returns the number of the signal which caused the child to stop.  This macro "
"should be employed only if B<WIFSTOPPED> returned true."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:236
#, no-wrap
msgid "B<WIFCONTINUED(>I<status>B<)>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:241
msgid ""
"(since Linux 2.6.10)  returns true if the child process was resumed by "
"delivery of B<SIGCONT>."
msgstr ""

#. type: SS
#: build/C/man2/wait.2:241
#, no-wrap
msgid "waitid()"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:246
msgid ""
"The B<waitid>()  system call (available since Linux 2.6.9) provides more "
"precise control over which child state changes to wait for."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:252
msgid ""
"The I<idtype> and I<id> arguments select the child(ren) to wait for, as "
"follows:"
msgstr ""

#. type: IP
#: build/C/man2/wait.2:252
#, no-wrap
msgid "I<idtype> == B<P_PID>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:255
msgid "Wait for the child whose process ID matches I<id>."
msgstr ""

#. type: IP
#: build/C/man2/wait.2:255
#, no-wrap
msgid "I<idtype> == B<P_PGID>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:258
msgid "Wait for any child whose process group ID matches I<id>."
msgstr ""

#. type: IP
#: build/C/man2/wait.2:258
#, no-wrap
msgid "I<idtype> == B<P_ALL>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:262
msgid "Wait for any child; I<id> is ignored."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:266
msgid ""
"The child state changes to wait for are specified by ORing one or more of "
"the following flags in I<options>:"
msgstr ""

#. type: TP
#: build/C/man2/wait.2:266
#, no-wrap
msgid "B<WEXITED>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:269
msgid "Wait for children that have terminated."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:269
#, no-wrap
msgid "B<WSTOPPED>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:272
msgid "Wait for children that have been stopped by delivery of a signal."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:272
#, no-wrap
msgid "B<WCONTINUED>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:277
msgid ""
"Wait for (previously stopped) children that have been resumed by delivery of "
"B<SIGCONT>."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:280
msgid "The following flags may additionally be ORed in I<options>:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:284
msgid "As for B<waitpid>()."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:284
#, no-wrap
msgid "B<WNOWAIT>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:288
msgid ""
"Leave the child in a waitable state; a later wait call can be used to again "
"retrieve the child status information."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:295
msgid ""
"Upon successful return, B<waitid>()  fills in the following fields of the "
"I<siginfo_t> structure pointed to by I<infop>:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:298
msgid "The process ID of the child."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:302
msgid ""
"The real user ID of the child.  (This field is not set on most other "
"implementations.)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:306
msgid "Always set to B<SIGCHLD>."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:306
#, no-wrap
msgid "I<si_status>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:316
msgid ""
"Either the exit status of the child, as given to B<_exit>(2)  (or "
"B<exit>(3)), or the signal that caused the child to terminate, stop, or "
"continue.  The I<si_code> field can be used to determine how to interpret "
"this field."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:333
msgid ""
"Set to one of: B<CLD_EXITED> (child called B<_exit>(2)); B<CLD_KILLED> "
"(child killed by signal); B<CLD_DUMPED> (child killed by signal, and dumped "
"core); B<CLD_STOPPED> (child stopped by signal); B<CLD_TRAPPED> (traced "
"child has trapped); or B<CLD_CONTINUED> (child continued by B<SIGCONT>)."
msgstr ""

#.  POSIX.1-2001 leaves this possibility unspecified; most
#.  implementations (including Linux) zero out the structure
#.  in this case, but at least one implementation (AIX 5.1)
#.  does not -- MTK Nov 04
#. type: Plain text
#: build/C/man2/wait.2:355
msgid ""
"If B<WNOHANG> was specified in I<options> and there were no children in a "
"waitable state, then B<waitid>()  returns 0 immediately and the state of the "
"I<siginfo_t> structure pointed to by I<infop> is unspecified.  To "
"distinguish this case from that where a child was in a waitable state, zero "
"out the I<si_pid> field before the call and check for a nonzero value in "
"this field after the call returns."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:359
msgid ""
"B<wait>(): on success, returns the process ID of the terminated child; on "
"error, -1 is returned."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:368
msgid ""
"B<waitpid>(): on success, returns the process ID of the child whose state "
"has changed; if B<WNOHANG> was specified and one or more child(ren) "
"specified by I<pid> exist, but have not yet changed state, then 0 is "
"returned.  On error, -1 is returned."
msgstr ""

#.  FIXME As reported by Vegard Nossum, if infop is NULL, then waitid()
#.  returns the PID of the child.  Either this is a bug, or it is intended
#.  behavior that needs to be documented.  See my Jan 2009 LKML mail
#.  "waitid() return value strangeness when infop is NULL".
#. type: Plain text
#: build/C/man2/wait.2:381
msgid ""
"B<waitid>(): returns 0 on success or if B<WNOHANG> was specified and no "
"child(ren) specified by I<id> has yet changed state; on error, -1 is "
"returned."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:385
msgid ""
"Each of these calls sets I<errno> to an appropriate value in the case of an "
"error."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:386 build/C/man2/wait.2:391
#, no-wrap
msgid "B<ECHILD>"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:391
msgid ""
"(for B<wait>())  The calling process does not have any unwaited-for "
"children."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:411
msgid ""
"(for B<waitpid>()  or B<waitid>())  The process specified by I<pid> "
"(B<waitpid>())  or I<idtype> and I<id> (B<waitid>())  does not exist or is "
"not a child of the calling process.  (This can happen for one's own child if "
"the action for B<SIGCHLD> is set to B<SIG_IGN>.  See also the I<Linux Notes> "
"section about threads.)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:418
msgid ""
"B<WNOHANG> was not set and an unblocked signal or a B<SIGCHLD> was caught; "
"see B<signal>(7)."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:423
msgid "The I<options> argument was invalid."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:438
msgid ""
"A child that terminates, but has not been waited for becomes a \"zombie\".  "
"The kernel maintains a minimal set of information about the zombie process "
"(PID, termination status, resource usage information)  in order to allow the "
"parent to later perform a wait to obtain information about the child.  As "
"long as a zombie is not removed from the system via a wait, it will consume "
"a slot in the kernel process table, and if this table fills, it will not be "
"possible to create further processes.  If a parent process terminates, then "
"its \"zombie\" children (if any)  are adopted by B<init>(1), which "
"automatically performs a wait to remove the zombies."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:467
msgid ""
"POSIX.1-2001 specifies that if the disposition of B<SIGCHLD> is set to "
"B<SIG_IGN> or the B<SA_NOCLDWAIT> flag is set for B<SIGCHLD> (see "
"B<sigaction>(2)), then children that terminate do not become zombies and a "
"call to B<wait>()  or B<waitpid>()  will block until all children have "
"terminated, and then fail with I<errno> set to B<ECHILD>.  (The original "
"POSIX standard left the behavior of setting B<SIGCHLD> to B<SIG_IGN> "
"unspecified.  Note that even though the default disposition of B<SIGCHLD> is "
"\"ignore\", explicitly setting the disposition to B<SIG_IGN> results in "
"different treatment of zombie process children.)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:480
msgid ""
"Linux 2.6 conforms to the POSIX requirements.  However, Linux 2.4 (and "
"earlier) does not: if a B<wait>()  or B<waitpid>()  call is made while "
"B<SIGCHLD> is being ignored, the call behaves just as though B<SIGCHLD> were "
"not being ignored, that is, the call blocks until the next child terminates "
"and then returns the process ID and status of that child."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:496
msgid ""
"In the Linux kernel, a kernel-scheduled thread is not a distinct construct "
"from a process.  Instead, a thread is simply a process that is created using "
"the Linux-unique B<clone>(2)  system call; other routines such as the "
"portable B<pthread_create>(3)  call are implemented using B<clone>(2).  "
"Before Linux 2.4, a thread was just a special case of a process, and as a "
"consequence one thread could not wait on the children of another thread, "
"even when the latter belongs to the same thread group.  However, POSIX "
"prescribes such functionality, and since Linux 2.4 a thread can, and by "
"default will, wait on children of other threads in the same thread group."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:503
msgid ""
"The following Linux-specific I<options> are for use with children created "
"using B<clone>(2); they cannot be used with B<waitid>():"
msgstr ""

#. type: TP
#: build/C/man2/wait.2:503
#, no-wrap
msgid "B<__WCLONE>"
msgstr ""

#.  since 0.99pl10
#. type: Plain text
#: build/C/man2/wait.2:514
msgid ""
"Wait for \"clone\" children only.  If omitted, then wait for \"non-clone\" "
"children only.  (A \"clone\" child is one which delivers no signal, or a "
"signal other than B<SIGCHLD> to its parent upon termination.)  This option "
"is ignored if B<__WALL> is also specified."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:514
#, no-wrap
msgid "B<__WALL> (since Linux 2.4)"
msgstr ""

#.  since patch-2.3.48
#. type: Plain text
#: build/C/man2/wait.2:519
msgid "Wait for all children, regardless of type (\"clone\" or \"non-clone\")."
msgstr ""

#. type: TP
#: build/C/man2/wait.2:519
#, no-wrap
msgid "B<__WNOTHREAD> (since Linux 2.4)"
msgstr ""

#.  since patch-2.4.0-test8
#. type: Plain text
#: build/C/man2/wait.2:525
msgid ""
"Do not wait for children of other threads in the same thread group.  This "
"was the default before Linux 2.4."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:537
msgid ""
"The raw B<waitid>()  system call takes a fifth argument, of type I<struct "
"rusage\\ *>.  If this argument is non-NULL, then it is used to return "
"resource usage information about the child, in the same manner as "
"B<wait4>(2).  See B<getrusage>(2)  for details."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:552
msgid ""
"According to POSIX.1-2008, an application calling B<waitid>()  must ensure "
"that I<infop> points to a I<siginfo_t> structure (i.e., that it is a "
"non-null pointer).  On Linux, if I<infop> is NULL, B<waitid>()  succeeds, "
"and returns the process ID of the waited-for child.  Applications should "
"avoid relying on this inconsistent, nonstandard, and unnecessary feature."
msgstr ""

#.  fork.2 refers to this example program.
#. type: Plain text
#: build/C/man2/wait.2:569
msgid ""
"The following program demonstrates the use of B<fork>(2)  and B<waitpid>().  "
"The program creates a child process.  If no command-line argument is "
"supplied to the program, then the child suspends its execution using "
"B<pause>(2), to allow the user to send signals to the child.  Otherwise, if "
"a command-line argument is supplied, then the child exits immediately, using "
"the integer supplied on the command line as the exit status.  The parent "
"process executes a loop that monitors the child using B<waitpid>(), and uses "
"the W*() macros described above to analyze the wait status value."
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:585
#, no-wrap
msgid ""
"$B< ./a.out &>\n"
"Child PID is 32360\n"
"[1] 32359\n"
"$B< kill -STOP 32360>\n"
"stopped by signal 19\n"
"$B< kill -CONT 32360>\n"
"continued\n"
"$B< kill -TERM 32360>\n"
"killed by signal 15\n"
"[1]+  Done                    ./a.out\n"
"$\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:594
#, no-wrap
msgid ""
"#include E<lt>sys/wait.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:600
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
"    pid_t cpid, w;\n"
"    int status;\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:606
#, no-wrap
msgid ""
"    cpid = fork();\n"
"    if (cpid == -1) {\n"
"        perror(\"fork\");\n"
"        exit(EXIT_FAILURE);\n"
"    }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:612
#, no-wrap
msgid ""
"    if (cpid == 0) {            /* Code executed by child */\n"
"        printf(\"Child PID is %ld\\en\", (long) getpid());\n"
"        if (argc == 1)\n"
"            pause();                    /* Wait for signals */\n"
"        _exit(atoi(argv[1]));\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:620
#, no-wrap
msgid ""
"    } else {                    /* Code executed by parent */\n"
"        do {\n"
"            w = waitpid(cpid, &status, WUNTRACED | WCONTINUED);\n"
"            if (w == -1) {\n"
"                perror(\"waitpid\");\n"
"                exit(EXIT_FAILURE);\n"
"            }\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:634
#, no-wrap
msgid ""
"            if (WIFEXITED(status)) {\n"
"                printf(\"exited, status=%d\\en\", WEXITSTATUS(status));\n"
"            } else if (WIFSIGNALED(status)) {\n"
"                printf(\"killed by signal %d\\en\", WTERMSIG(status));\n"
"            } else if (WIFSTOPPED(status)) {\n"
"                printf(\"stopped by signal %d\\en\", WSTOPSIG(status));\n"
"            } else if (WIFCONTINUED(status)) {\n"
"                printf(\"continued\\en\");\n"
"            }\n"
"        } while (!WIFEXITED(status) && !WIFSIGNALED(status));\n"
"        exit(EXIT_SUCCESS);\n"
"    }\n"
"}\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait.2:647
msgid ""
"B<_exit>(2), B<clone>(2), B<fork>(2), B<kill>(2), B<ptrace>(2), "
"B<sigaction>(2), B<signal>(2), B<wait4>(2), B<pthread_create>(3), "
"B<credentials>(7), B<signal>(7)"
msgstr ""

#. type: TH
#: build/C/man2/wait4.2:33
#, no-wrap
msgid "WAIT4"
msgstr ""

#. type: TH
#: build/C/man2/wait4.2:33
#, no-wrap
msgid "2012-09-23"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:36
msgid "wait3, wait4 - wait for process to change state, BSD style"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:42
#, no-wrap
msgid ""
"B<#include E<lt>sys/types.hE<gt>>\n"
"B<#include E<lt>sys/time.hE<gt>>\n"
"B<#include E<lt>sys/resource.hE<gt>>\n"
"B<#include E<lt>sys/wait.hE<gt>>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:45
#, no-wrap
msgid ""
"B<pid_t wait3(int *>I<status>B<, int >I<options>B<,>\n"
"B<            struct rusage *>I<rusage>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:48
#, no-wrap
msgid ""
"B<pid_t wait4(pid_t >I<pid>B<, int *>I<status>B<, int >I<options>B<,>\n"
"B<            struct rusage *>I<rusage>B<);>\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:57
msgid "B<wait3>():"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:63
msgid "B<wait4>():"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:65
msgid "_BSD_SOURCE"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:73
msgid ""
"These functions are obsolete; use B<waitpid>(2)  or B<waitid>(2)  in new "
"programs."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:83
msgid ""
"The B<wait3>()  and B<wait4>()  system calls are similar to B<waitpid>(2), "
"but additionally return resource usage information about the child in the "
"structure pointed to by I<rusage>."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:89
msgid ""
"Other than the use of the I<rusage> argument, the following B<wait3>()  "
"call:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:92
#, no-wrap
msgid "    wait3(status, options, rusage);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:95 build/C/man2/wait4.2:109
msgid "is equivalent to:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:98
#, no-wrap
msgid "    waitpid(-1, status, options);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:103
msgid "Similarly, the following B<wait4>()  call:"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:106
#, no-wrap
msgid "    wait4(pid, status, options, rusage);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:112
#, no-wrap
msgid "    waitpid(pid, status, options);\n"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:122
msgid ""
"In other words, B<wait3>()  waits of any child, while B<wait4>()  can be "
"used to select a specific child, or children, on which to wait.  See "
"B<wait>(2)  for further details."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:132
msgid ""
"If I<rusage> is not NULL, the I<struct rusage> to which it points will be "
"filled with accounting information about the child.  See B<getrusage>(2)  "
"for details."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:135 build/C/man2/wait4.2:138
msgid "As for B<waitpid>(2)."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:140
msgid "4.3BSD."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:147
msgid ""
"SUSv1 included a specification of B<wait3>(); SUSv2 included B<wait3>(), but "
"marked it LEGACY; SUSv3 removed it."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:159
msgid ""
"Including I<E<lt>sys/time.hE<gt>> is not required these days, but increases "
"portability.  (Indeed, I<E<lt>sys/resource.hE<gt>> defines the I<rusage> "
"structure with fields of type I<struct timeval> defined in "
"I<E<lt>sys/time.hE<gt>>.)"
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:165
msgid ""
"On Linux, B<wait3>()  is a library function implemented on top of the "
"B<wait4>()  system call."
msgstr ""

#. type: Plain text
#: build/C/man2/wait4.2:172
msgid ""
"B<fork>(2), B<getrusage>(2), B<sigaction>(2), B<signal>(2), B<wait>(2), "
"B<signal>(7)"
msgstr ""