1 .\" Copyright (C) 2004 Andries Brouwer (aeb@cwi.nl)
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25 .TH SIGPAUSE 3 2014-08-19 "Linux" "Linux Programmer's Manual"
27 sigpause \- atomically release blocked signals and wait for interrupt
30 .B #include <signal.h>
32 .BI "int sigpause(int " sigmask "); /* BSD (but see NOTES) */"
34 .BI "int sigpause(int " sig "); /* System V / UNIX 95 */"
37 Don't use this function.
44 is designed to wait for some signal.
45 It changes the process's signal mask (set of blocked signals),
46 and then waits for a signal to arrive.
47 Upon arrival of a signal, the original signal mask is restored.
51 returns, it was interrupted by a signal and the return value is \-1
57 .SS Multithreading (see pthreads(7))
60 function is thread-safe.
62 The System V version of
64 is standardized in POSIX.1-2001.
67 The classical BSD version of this function appeared in 4.2BSD.
68 It sets the process's signal mask to
70 UNIX 95 standardized the incompatible System V version of
71 this function, which removes only the specified signal
73 from the process's signal mask.
74 .\" __xpg_sigpause: UNIX 95, spec 1170, SVID, SVr4, XPG
75 The unfortunate situation with two incompatible functions with the
76 same name was solved by the
78 function, that takes a
80 argument (instead of an
83 On Linux, this routine is a system call only on the Sparc (sparc64)
86 .\" Libc4 and libc5 know only about the BSD version.
88 Glibc uses the BSD version if the
90 feature test macro is defined and none of
98 Otherwise, the System V version is used (and
100 must be defined to obtain the declaration).
101 Since glibc 2.19, only the System V version is exposed by
103 applications that formerly used the BSD
105 should be amended to use
108 .\" For the BSD version, one usually uses a zero
110 .\" to indicate that no signals are to be blocked.
118 .BR feature_test_macros (7)
120 This page is part of release 3.79 of the Linux
123 A description of the project,
124 information about reporting bugs,
125 and the latest version of this page,
127 \%http://www.kernel.org/doc/man\-pages/.