(split) LDP v3.24 -> v3.29 の定型的な変更内容を反映。

[linuxjm/LDP_man-pages.git] / release / man2 / getrlimit.2

.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (c) 1992 Drew Eckhardt, March 28, 1992
.\" and Copyright (c) 2002, 2004, 2005, 2008 Michael Kerrisk
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified by Michael Haardt <michael@moria.de>
.\" Modified 1993-07-23 by Rik Faith <faith@cs.unc.edu>
.\" Modified 1996-01-13 by Arnt Gulbrandsen <agulbra@troll.no>
.\" Modified 1996-01-22 by aeb, following a remark by
.\"          Tigran Aivazian <tigran@sco.com>
.\" Modified 1996-04-14 by aeb, following a remark by
.\"          Robert Bihlmeyer <robbe@orcus.ping.at>
.\" Modified 1996-10-22 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 2001-05-04 by aeb, following a remark by
.\"          Havard Lygre <hklygre@online.no>
.\" Modified 2001-04-17 by Michael Kerrisk <mtk.manpages@gmail.com>
.\" Modified 2002-06-13 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Added note on nonstandard behavior when SIGCHLD is ignored.
.\" Modified 2002-07-09 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Enhanced descriptions of 'resource' values for [gs]etrlimit()
.\" Modified 2003-11-28 by aeb, added RLIMIT_CORE
.\" Modified 2004-03-26 by aeb, added RLIMIT_AS
.\" Modified 2004-06-16 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Added notes on CAP_SYS_RESOURCE
.\"
.\" 2004-11-16 -- mtk: the getrlimit.2 page, which formally included
.\" coverage of getrusage(2), has been split, so that the latter
.\" is now covered in its own getrusage.2.
.\"
.\" Modified 2004-11-16, mtk: A few other minor changes
.\" Modified 2004-11-23, mtk
.\"     Added notes on RLIMIT_MEMLOCK, RLIMIT_NPROC, and RLIMIT_RSS
.\"             to "CONFORMING TO"
.\" Modified 2004-11-25, mtk
.\"     Rewrote discussion on RLIMIT_MEMLOCK to incorporate kernel
.\"             2.6.9 changes.
.\"     Added note on RLIMIT_CPU error in older kernels
.\" 2004-11-03, mtk, Added RLIMIT_SIGPENDING
.\" 2005-07-13, mtk, documented RLIMIT_MSGQUEUE limit.
.\" 2005-07-28, mtk, Added descriptions of RLIMIT_NICE and RLIMIT_RTPRIO
.\" 2008-05-07, mtk / Peter Zijlstra, Added description of RLIMIT_RTTIME
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\"         all rights reserved.
.\" Translated 1997-02-22, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated and Modified 2001-06-02, Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated and Modified 2001-08-18, Yuichi SATO
.\" Updated and Modified 2002-08-25, Yuichi SATO
.\" Updated and Modified 2004-01-17, Yuichi SATO
.\" Updated and Modified 2004-12-30, Yuichi SATO
.\" Updated and Modified 2005-09-10, Yuichi SATO
.\" Updated and Modified 2005-10-11, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated and Modified 2005-10-27, Akihiro MOTOKI
.\" Updated and Modified 2006-04-15, Akihiro MOTOKI, Catch up to LDP v2.29
.\" Updated 2008-08-08, Akihiro MOTOKI, LDP v3.05
.\" Updated 2008-10-13, Akihiro MOTOKI, LDP v3.11
.\"
.\"WORD:        resource                »ñ¸»
.\"WORD:        limit                   À©¸Â
.\"
.TH GETRLIMIT 2 2010-09-26 "Linux" "Linux Programmer's Manual"
.SH ̾Á°
getrlimit, setrlimit \- »ñ¸»¤ÎÀ©¸Â¤ò¼èÆÀ/ÀßÄꤹ¤ë
.SH ½ñ¼°
.B #include <sys/time.h>
.br
.B #include <sys/resource.h>
.sp
.BI "int getrlimit(int " resource ", struct rlimit *" rlim );
.br
.BI "int setrlimit(int " resource ", const struct rlimit *" rlim );
.SH ÀâÌÀ
.BR getrlimit ()
¤È
.BR setrlimit ()
¤Ï¤½¤ì¤¾¤ì»ñ¸» (resource) ¤ÎÀ©¸Â (limit) ¤ÎÀßÄê¤È¼èÆÀ¤ò¹Ô¤¦¡£
³Æ¥ê¥½¡¼¥¹¤Ë¤Ï¡¢¤½¤ì¤ËÂбþ¤¹¤ë¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤È¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤¬¤¢¤ë¡£
¥ê¥ß¥Ã¥È¤Ï
.RB ( getrlimit ()
¤È
.BR setrlimit ()
¤Î
.I rlim
°ú¤­¿ô¤Ç¤¢¤ë)
.I rlimit
¹½Â¤ÂΤÇÄêµÁ¤µ¤ì¤ë:
.PP
.in +4n
.nf
struct rlimit {
    rlim_t rlim_cur;  /* ¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È */
    rlim_t rlim_max;  /* ¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È
                         (rlim_cur ¤è¤ê¾®¤µ¤¯¤Ê¤¤) */
};

.fi
.in
¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Ï¡¢¥«¡¼¥Í¥ë¤¬Âбþ¤¹¤ë¥ê¥½¡¼¥¹¤ËÂФ·¤Æ²Ý¤¹À©¸ÂÃͤǤ¢¤ë¡£
¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤Ï¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Î¾å¸Â¤È¤·¤ÆƯ¤¯¡£
Æø¢¤ò»ý¤¿¤Ê¤¤¥×¥í¥»¥¹¤Ï¡¢¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤ÎÃͤò
0 ¤«¤é¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤ÎÈϰϤËÀßÄꤹ¤ë¤³¤È¤È¡¢
¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤ò²¼¤²¤ë¤³¤È¤Î¤ß¤¬¤Ç¤­¤ë
(°ìÅÙ²¼¤²¤¿¥Ï¡¼¥É¥ê¥ß¥Ã¥È¤Ï¾å¤²¤é¤ì¤Ê¤¤)¡£
Æø¢¥×¥í¥»¥¹ (Linux ¤Ç¤Ï
.B CAP_SYS_RESOURCE
¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£ (capability) ¤ò»ý¤Ä¥×¥í¥»¥¹) ¤Ï
¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤È¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤ò¼«Í³¤ËÊѹ¹¤Ç¤­¤ë¡£
.PP
ÃÍ
.B RLIM_INFINITY
¤Ï¥ê¥½¡¼¥¹¤ËÀ©¸Â¤¬¤Ê¤¤¤³¤È¤òɽ¤¹
(¤³¤ÎÃͤÏ
.BR getrlimit ()
¤¬ÊÖ¤¹¹½Â¤ÂΤÈ
.BR setrlimit ()
¤ËÅϤ¹¹½Â¤ÂΤÎξÊý¤Ç»ÈÍѤµ¤ì¤ë)¡£
.PP
.I resource
¤Ï¼¡¤Î¤¤¤º¤ì¤« 1 ¤Ä¤Ç¤¢¤ë¡£
.TP
.B RLIMIT_AS
¥×¥í¥»¥¹¤Î²¾ÁÛ¥á¥â¥ê (¥¢¥É¥ì¥¹¶õ´Ö) ¤ÎºÇÂ祵¥¤¥º (¥Ð¥¤¥Èñ°Ì)¡£
.\" 2.0.27 / 2.1.12 °Ê¹ß¡£
¤³¤ÎÀ©¸Â¤Ï
.BR brk (2),
.BR mmap (2),
.BR mremap (2)
¤Î¸Æ¤Ó½Ð¤·¤Ë±Æ¶Á¤·¡¢¤³¤ÎÀ©¸Â¤òĶ¤¨¤¿¾ì¹ç¤Ï
¥¨¥é¡¼
.B ENOMEM
¤Ç¼ºÇÔ¤¹¤ë¡£
¤Þ¤¿¼«Æ°Åª¤Ê¥¹¥¿¥Ã¥¯³ÈÄ¥¤Ë¤â¼ºÇÔ¤¹¤ë
(¤µ¤é¤Ë
.BR sigaltstack (2)
¤ò»È¤Ã¤¿ÂåÂØ¥¹¥¿¥Ã¥¯¤òÍøÍѲÄǽ¤Ë¤·¤Æ¤¤¤Ê¤«¤Ã¤¿¾ì¹ç¤Ë¤Ï¡¢
.B SIGSEGV
¤òÀ¸À®¤·¤Æ¤½¤Î¥×¥í¥»¥¹¤ò kill ¤¹¤ë)¡£
¤³¤ÎÃÍ¤Ï \fIlong\fP ·¿¤Ê¤Î¤Ç¡¢32 ¥Ó¥Ã¥È¤Î \fIlong\fP ·¿¤ò»ý¤Ä¥Þ¥·¥ó¤Ç¤Ï¡¢
¤³¤ÎÀ©¸Â¤ÏºÇÂç¤Ç 2 GiB ¤Ë¤Ê¤ë¤«¡¢¤³¤Î»ñ¸»¤¬ÌµÀ©¸Â¤Ë¤Ê¤ë¡£
.TP
.B RLIMIT_CORE
.I core
¥Õ¥¡¥¤¥ë¤ÎºÇÂ祵¥¤¥º¡£
0 ¤Î¾ì¹ç¡¢core ¥Õ¥¡¥¤¥ë¤ÏÀ¸À®¤µ¤ì¤Ê¤¤¡£
0 °Ê³°¤Î¾ì¹ç¡¢¤³¤Î¥µ¥¤¥º¤è¤êÂ礭¤¤¥À¥ó¥×¤ÏÀÚ¤êµÍ¤á¤é¤ì¤ë¡£
.TP
.B RLIMIT_CPU
CPU »þ´Ö¤Î¾å¸Â (Éÿô)¡£
¥×¥í¥»¥¹¤¬¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Ë㤷¤¿¾ì¹ç¤Ë¡¢
.B SIGXCPU
¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£
¤³¤Î¥·¥°¥Ê¥ë¤ËÂФ¹¤ë¥Ç¥Õ¥©¥ë¥È¤ÎÆ°ºî¤Ï¡¢¥×¥í¥»¥¹¤Î½ªÎ»¤Ç¤¢¤ë¡£
¤¿¤À¤·¥·¥°¥Ê¥ë¤ò¥­¥ã¥Ã¥Á¤·¤Æ¡¢¥Ï¥ó¥É¥é¤¬¥á¥¤¥ó¥×¥í¥°¥é¥à¤Ë
À©¸æ¤òÊÖ¤¹¤³¤È¤â¤Ç¤­¤ë¡£
¥×¥í¥»¥¹¤¬ CPU »þ´Ö¤ò»È¤¤Â³¤±¤¿¾ì¹ç¤Ï¡¢
¥Ï¡¼¥É¥ê¥ß¥Ã¥È¤Ë㤹¤ë¤Þ¤Ç 1 ÉÃËè¤Ë¥×¥í¥»¥¹¤Ë
.B SIGXCPU
¤òÁ÷¤ê¡¢
¥Ï¡¼¥É¥ê¥ß¥Ã¥È¤Ë㤹¤ë¤È
.B SIGKILL
¤òÁ÷¤ë¡£
¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤òĶ²á¤·¤¿¤È¤­¤ÎÆ°ºî¤Ï¡¢
Linux 2.2 ¤«¤é 2.6 ¤Î¤â¤Î¤Ç¤¢¤ë¡£
¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤òĶ¤¨¤Æ CPU »þ´Ö¤ò»È¤¤Â³¤±¤ë¥×¥í¥»¥¹¤Î
°·¤¤Êý¤Ë¤Ä¤¤¤Æ¤Î¼ÂÁõ¤ÏÊѲ½¤·¤Æ¤­¤Æ¤¤¤ë¡£
¤³¤Î¥·¥°¥Ê¥ë¤ò¥­¥ã¥Ã¥Á¤¹¤ëɬÍפΤ¢¤ë
°Ü¿¢À­¤ò¹Í¤¨¤¿¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤Ç¤Ï¡¢
ºÇ½é¤Ë
.B SIGXCPU
¤ò¼õ¤±¼è¤Ã¤¿»þÅÀ¤ÇÀµ¤·¤¯½ªÎ»¤¹¤Ù¤­¤Ç¤¢¤ë¡£
.TP
.B RLIMIT_DATA
¥×¥í¥»¥¹¤Î¥Ç¡¼¥¿¥»¥°¥á¥ó¥È
(½é´ü²½¤µ¤ì¤¿¥Ç¡¼¥¿¡¦½é´ü²½¤µ¤ì¤Æ¤¤¤Ê¤¤¥Ç¡¼¥¿¡¦¥Ò¡¼¥×) ¤ÎºÇÂçÃÍ¡£
¤³¤Î¥ê¥ß¥Ã¥È¤Ï
.BR brk (2)
¤È
.BR sbrk (2)
¤Î¸Æ¤Ó½Ð¤·¤Ë±Æ¶Á¤¹¤ë¡£
¤³¤ì¤é¤Î´Ø¿ô¤Ï¡¢¤³¤Î¥ê¥½¡¼¥¹¤Î¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Ë㤹¤ë¤È¡¢
¥¨¥é¡¼
.B ENOMEM
¤Ç¼ºÇÔ¤¹¤ë¡£
.TP
.B RLIMIT_FSIZE
¥×¥í¥»¥¹¤¬ºîÀ®¤Ç¤­¤ë¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤ÎºÇÂçÃÍ¡£
¤³¤Î¥µ¥¤¥º¤òĶ¤¨¤Æ¥Õ¥¡¥¤¥ë¤ò³ÈÄ¥¤¹¤ë¤È¡¢
.B SIGXFSZ
¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢¤³¤Î¥·¥°¥Ê¥ë¤Ï¥×¥í¥»¥¹¤ò½ªÎ»¤¹¤ë¡£
¥×¥í¥»¥¹¤ò¥­¥ã¥Ã¥Á¤¹¤ë¤³¤È¤â¤Ç¤­¤ë¤¬¡¢
´ØÏ¢¤¹¤ë¥·¥¹¥Æ¥à¥³¡¼¥ë
.RB ( write (2),
.BR truncate (2)
¤Ê¤É) ¤Ï¥¨¥é¡¼
.B EFBIG
¤Ç¼ºÇÔ¤¹¤ë¡£
.TP
.BR RLIMIT_LOCKS " (½é´ü¤Î Linux 2.4 ¤Î¤ß)"
.\" Àµ³Î¤Ë¤Ï Linux 2.4.0-test9 ¤Î¤ß¡£2.4.25 / 2.5.65 ¤Ç¤Ï¤Ê¤¯¤Ê¤Ã¤Æ¤¤¤ë¡£
¤³¤Î¥×¥í¥»¥¹¤¬¼Â¹Ô¤Ç¤­¤ë
.BR flock (2)
¥í¥Ã¥¯¿ô¤È
.BR fcntl (2)
¥ê¡¼¥¹¿ô¤Î¹ç·×ÃͤòÀ©¸Â¤¹¤ë¡£
.TP
.B RLIMIT_MEMLOCK
RAM Æâ¤Ë¥í¥Ã¥¯¤Ç¤­¤ë¥á¥â¥ê¤ÎºÇÂç¥Ð¥¤¥È¿ô¡£
¼ÂºÝ¤Ë¤Ï¡¢¤³¤ÎÀ©¸Â¤Ï¥·¥¹¥Æ¥à¥Ú¡¼¥¸¥µ¥¤¥º¤ÎºÇ¤â¶á¤¤ÇÜ¿ô¤Ë
ÀÚ¤ê¼Î¤Æ¤Æ´Ý¤á¤é¤ì¤ë¡£
¤³¤ÎÀ©¸Â¤Ï
.BR mlock (2),
.BR mlockall (2),
.BR mmap (2)
¤Î
.B MAP_LOCKED
Áàºî¤Ë±Æ¶Á¤¹¤ë¡£
Linux 2.6.9 °Ê¹ß¤Ç¤Ï
.BR shmctl (2)
.B SHM_LOCK
Áàºî¤Ë¤â±Æ¶Á¤¹¤ë¡£
¤³¤ÎÁàºî¤Ï¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â (real) ¥æ¡¼¥¶¡¼ ID ¤Ë¥í¥Ã¥¯¤µ¤ì¤ë
¶¦Í­¥á¥â¥ê¥»¥°¥á¥ó¥È
.RB ( shmget (2)
¤ò»²¾È) ¤Î¹ç·×¥Ð¥¤¥È¿ô¤ÎºÇÂçÃͤòÀßÄꤹ¤ë¡£
.BR shmctl (2)
.B SHM_LOCK
¤Ë¤è¤ë¥í¥Ã¥¯¤Ï¡¢
.BR mlock (2),
.BR mlockall (2),
.BR mmap (2)
¤Î
.B MAP_LOCKED
¤Ë¤è¤Ã¤Æ³ÎΩ¤µ¤ì¤ë¥×¥í¥»¥¹Ëè¤Î¥á¥â¥ê¥í¥Ã¥¯¤È¤Ïʬ¤±¤Æ¿ô¤¨¤ë¡£
1 ¤Ä¤Î¥×¥í¥»¥¹¤Ï¤³¤ÎÀ©¸Â¤Þ¤Ç¤Î¥Ð¥¤¥È¤ò¥í¥Ã¥¯¤Ç¤­¤ë¡£
¤³¤ÎÀ©¸Â¤Ë¤Ï 2 ¤Ä¤Î¼ïÎब¤¢¤ë¡£
2.6.9 ¤è¤êÁ°¤Î Linux ¥«¡¼¥Í¥ë ¤Ç¤Ï¡¢
¤³¤ÎÀ©¸Â¤ÏÆø¢¥×¥í¥»¥¹¤Ë¤è¤Ã¤Æ¥í¥Ã¥¯¤µ¤ì¤ë¥á¥â¥ê¤Î¹ç·×¤òÀ©¸æ¤·¤Æ¤¤¤¿¡£
Linux 2.6.9 °Ê¹ß¤Ç¤Ï¡¢Æø¢¥×¥í¥»¥¹¤¬¥í¥Ã¥¯¤¹¤ë¥á¥â¥ê¤Î¹ç·×¤ËÀ©¸Â¤Ï¤Ê¤¯¡¢
Âå¤ï¤ê¤Ë¤³¤ÎÀ©¸Â¤ÏÈóÆø¢¥×¥í¥»¥¹¤¬¥í¥Ã¥¯¤¹¤ë¥á¥â¥ê¤Î¹ç·×¤Ë
ŬÍѤµ¤ì¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¡£
.TP
.BR RLIMIT_MSGQUEUE " (Linux 2.6.8 °Ê¹ß)"
¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â¥æ¡¼¥¶¡¼ ID ¤ËÂФ·¤Æ¡¢
POSIX ¥á¥Ã¥»¡¼¥¸¥­¥å¡¼¤Î¤¿¤á¤Ë³ÎÊݤǤ­¤ë¥Ð¥¤¥È¿ô¤ÎÀ©¸Â¤ò»ØÄꤹ¤ë¡£
¤³¤ÎÀ©¸Â¤Ï
.BR mq_open (3)
¤ËÂФ·¤ÆŬÍѤµ¤ì¤ë¡£
¥æ¡¼¥¶¤¬ºîÀ®¤·¤¿³Æ¡¹¤Î¥á¥Ã¥»¡¼¥¸¥­¥å¡¼¤Î¥Ð¥¤¥È¿ô¤Ï
°Ê²¼¤Î¼°¤Ë¤è¤ê·×»»¤µ¤ì¡¢(¤½¤Î¥­¥å¡¼¤¬ºï½ü¤µ¤ì¤ë¤Þ¤Ç¤Î´Ö)
¤³¤ÎÀ©¸Â¤Î·×»»Âоݤ˴ޤá¤é¤ì¤ë¡£
.nf

    bytes = attr.mq_maxmsg * sizeof(struct msg_msg *) +
            attr.mq_maxmsg * attr.mq_msgsize

.fi
¤³¤³¤Ç
.I attr
¤Ï
.I mq_attr
¹½Â¤ÂΤǤ¢¤ê¡¢
.BR mq_open (3)
¤ÎÂè 4 °ú¤­¿ô¤È¤·¤Æ»ØÄꤵ¤ì¤ë¡£

.I "sizeof(struct msg_msg *)"
(Linux/i386 ¤Ç¤Ï 4 ¥Ð¥¤¥È) ¤ò´Þ¤àºÇ½é¤Î²Ã¿ô¤Ï¡¢
¥æ¡¼¥¶¡¼¤¬Ä¹¤µ 0 ¤Î¥á¥Ã¥»¡¼¥¸¤ò̵À©¸Â¤Ëºî¤ì¤Ê¤¤¤³¤ÈÊݾڤ·¤Æ¤¤¤ë
(¤³¤Î¤è¤¦¤Ê¥á¥Ã¥»¡¼¥¸¤Ç¤¢¤Ã¤Æ¤â¡¢
µ­Ï¿¤Î¤¿¤á¤Î¥ª¡¼¥Ð¡¼¥Ø¥Ã¥É¤Ç¥·¥¹¥Æ¥à¥á¥â¥ê¤ò¾ÃÈñ¤¹¤ë)¡£
.TP
.BR RLIMIT_NICE " (Linux 2.6.12 °Ê¹ß, ²¼µ­¤Î¡Ö¥Ð¥°¡×¤ÎÀá¤â»²¾È)"
.BR setpriority (2)
¤ä
.BR nice (2)
¤ò»È¤Ã¤Æ°ú¤­¾å¤²¤é¤ì¤ë¥×¥í¥»¥¹¤Î nice Ãͤξå¸Â¤ò»ØÄꤹ¤ë¡£
nice Ãͤμºݤξå¸Â¤Ï
.I "20\ \-\ rlim_cur"
¤Ç·×»»¤µ¤ì¤ë
(¤³¤Î¤è¤¦¤ÊÊѤʾõ¶·¤Ï¡¢¥ê¥½¡¼¥¹À©¸ÂÃͤȤ·¤ÆÉé¤Î¿ô¤ò»ØÄê¤Ç¤­¤Ê¤¤¤¿¤á
ȯÀ¸¤¹¤ë¡£Ä̾Éé¤ÎÃͤÏÆÃÊ̤ʰÕÌ£¤ò»ý¤Ã¤Æ¤¤¤ë¤«¤é¤Ç¤¢¤ë¡£
Î㤨¤Ð¡¢Ä̾ï¤Ï
.B RLIM_INFINITY
¤ÎÃÍ¤Ï \-1 ¤Ç¤¢¤ë)¡£
.TP
.B RLIMIT_NOFILE
¤³¤Î¥×¥í¥»¥¹¤¬¥ª¡¼¥×¥ó¤Ç¤­¤ë¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¿ô¤ÎºÇÂçÃͤè¤ê
1 Â礭¤¤Ãͤò»ØÄꤹ¤ë¡£
.RB ( open (2),
.BR pipe (2),
.BR dup (2)
¤Ê¤É¤Ë¤è¤ê) ¤³¤Î¾å¸Â¤òĶ¤¨¤è¤¦¤È¤·¤¿¾ì¹ç¡¢¥¨¥é¡¼
.B EMFILE
¤¬È¯À¸¤¹¤ë
(Îò»ËŪ¤Ë¡¢BSD ¤Ç¤Ï¤³¤Î¾å¸Â¤Ï
.B RLIMIT_OFILE
¤È¤¤¤¦Ì¾Á°¤È¤Ê¤Ã¤Æ¤¤¤ë)¡£
.TP
.B RLIMIT_NPROC
¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¥æ¡¼¥¶¡¼ ID ¤ÇºîÀ®¤Ç¤­¤ëºÇÂç¥×¥í¥»¥¹¿ô
(¤è¤êÀµ³Î¤Ë¤Ï Linux ¤Ç¤Ï¥¹¥ì¥Ã¥É¿ô)¡£
¤³¤Î¾å¸Â¤Ë㤹¤ë¤È¡¢
.BR fork (2)
¤Ï¥¨¥é¡¼
.B EAGAIN
¤Ç¼ºÇÔ¤¹¤ë¡£
.TP
.B RLIMIT_RSS
¥×¥í¥»¥¹¤Î resident set (RAM ¾å¤Ë¸ºß¤¹¤ë²¾ÁÛ¥Ú¡¼¥¸¤Î¿ô) ¤Î
¾å¸Â¤ò (¥Ú¡¼¥¸¿ô¤Ç) »ØÄꤹ¤ë¡£
¤³¤ÎÀ©¸Â¤Ï 2.4.30 ¤è¤êÁ°¤Ç¤·¤«±Æ¶Á¤¬¤Ê¤¯¡¢
.BR madvise (2)
¤Ë
.B MADV_WILLNEED
¤ò»ØÄꤷ¤¿´Ø¿ô¥³¡¼¥ë¤Ë¤·¤«±Æ¶Á¤·¤Ê¤¤¡£
.\" ¥«¡¼¥Í¥ë 2.6.12 ¤Î»þÅÀ¤Ç¤Ï¡¢
.\" ¤³¤ÎÀ©¸Â¤Ï¥«¡¼¥Í¥ë 2.6 ¤Ç¤Ï¤Þ¤À²¿¤â¹Ô¤ï¤Ê¤¤¡£
.\" ¤·¤«¤·¡¢²¿¤ò¤µ¤»¤ë¤«¤Ë¤Ä¤¤¤Æ¤Ï LKML ¤Ç»þ¡¹ÏÃÂê¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£
.\"       -- MTK, Jul 05
.TP
.BR RLIMIT_RTPRIO " (Linux 2.6.12 °Ê¹ß, ¥Ð¥°¤ÎÀá¤â»²¾È)"
.BR sched_setscheduler (2)
¤ä
.BR sched_setparam (2)
¤ò»È¤Ã¤ÆÀßÄê¤Ç¤­¤ë¡¢¤½¤Î¥×¥í¥»¥¹¤Î¥ê¥¢¥ë¥¿¥¤¥àÍ¥ÀèÅ٤ξå¸Â¤ò»ØÄꤹ¤ë¡£
.TP
.BR RLIMIT_RTTIME " (Linux 2.6.25 °Ê¹ß)"
¥ê¥¢¥ë¥¿¥¤¥à¡¦¥¹¥±¥¸¥å¡¼¥ê¥ó¥°Êý¿Ë¤Ç¥¹¥±¥¸¥å¡¼¥ê¥ó¥°¤µ¤ì¤ë¥×¥í¥»¥¹¤¬
¥Ö¥í¥Ã¥­¥ó¥°·¿¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤ò¸Æ¤Ó½Ð¤µ¤º¤Ë¾ÃÈñ¤¹¤ë¤³¤È¤Î¤Ç¤­¤ë
CPU »þ´Ö¤Î¹ç·×¤Ë¤Ä¤¤¤Æ¤Î¾å¸Â¤ò (¥Þ¥¤¥¯¥íÉÃñ°Ì¤Ç) »ØÄꤹ¤ë¡£
¤³¤Î¾å¸Â¤ÎÌÜŪ¤Î¤¿¤á¡¢¥×¥í¥»¥¹¤¬¥Ö¥í¥Ã¥­¥ó¥°·¿¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤ò
¸Æ¤Ó½Ð¤¹Å٤ˡ¢¾ÃÈñ¤µ¤ì¤¿ CPU »þ´Ö¤Î¥«¥¦¥ó¥È¤Ï 0 ¤Ë¥ê¥»¥Ã¥È¤µ¤ì¤ë¡£
¥×¥í¥»¥¹¤¬ CPU ¤ò»È¤¤Â³¤±¤è¤¦¤È¤·¤¿¤¬Â¾¤Î¥×¥í¥»¥¹¤ËÃÖ¤­´¹¤¨¤é¤ì¤¿
(preempted) ¾ì¹ç¤ä¡¢¤½¤Î¥×¥í¥»¥¹¤Î¥¿¥¤¥à¥¹¥é¥¤¥¹¤¬Ëþλ¤·¤¿¾ì¹ç¡¢
¤½¤Î¥×¥í¥»¥¹¤¬
.BR sched_yield (2)
¤ò¸Æ¤Ó½Ð¤·¤¿¾ì¹ç¤Ï¡¢CPU »þ´Ö¤Î¥«¥¦¥ó¥È¤Ï¥ê¥»¥Ã¥È¤µ¤ì¤Ê¤¤¡£

¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Ë㤹¤ë¤È¡¢¤½¤Î¥×¥í¥»¥¹¤Ë
.B SIGXCPU
¥·¥°¥Ê¥ë¤¬Á÷¤é¤ì¤ë¡£¤½¤Î¥×¥í¥»¥¹¤¬¤³¤Î¥·¥°¥Ê¥ë¤òÊ᪤¹¤ë¤«
̵»ë¤·¤Æ¡¢CPU »þ´Ö¤ò¾ÃÈñ¤·Â³¤±¤¿¾ì¹ç¤Ë¤Ï¡¢
¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤Ë㤹¤ë¤Þ¤Ç 1 ÉÃ¤Ë 1 ²ó
.B SIGXCPU
¤¬À¸À®¤µ¤ì³¤±¤ë¤³¤È¤Ë¤Ê¤ë¡£
¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤Ë㤷¤¿»þÅÀ¤Ç¡¢¤½¤Î¥×¥í¥»¥¹¤Ë¤Ï
.B SIGKILL
¥·¥°¥Ê¥ë¤¬Á÷¤é¤ì¤ë¡£

¤³¤Î¾å¸Â¤ò°Õ¿ÞŪ¤Ë»ÈÍѤ¹¤ë¤Î¤Ï¡¢Ë½Áö¤·¤¿¥ê¥¢¥ë¥¿¥¤¥à¡¦¥×¥í¥»¥¹¤ò
Ää»ß¤·¤Æ¡¢¥·¥¹¥Æ¥à¤¬Æ°¤«¤Ê¤¯¤Ê¤ë¤Î¤òÈò¤±¤ë¾ì¹ç¤Ç¤¢¤ë¡£
.TP
.BR RLIMIT_SIGPENDING " (Linux 2.6.8 °Ê¹ß)"
¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â¥æ¡¼¥¶¡¼ ID ¤ËÂФ·¤Æ
¥­¥å¡¼¤ËÆþ¤ì¤é¤ì¤ë¥·¥°¥Ê¥ë¤Î¿ô¤ÎÀ©¸Â¤ò»ØÄꤹ¤ë¡£
¤³¤ÎÀ©¸Â¤ò¥Á¥§¥Ã¥¯¤¹¤ë¤¿¤á¡¢
ɸ½à¥·¥°¥Ê¥ë¤È¥ê¥¢¥ë¥¿¥¤¥à¡¦¥·¥°¥Ê¥ë¤ÎξÊý¤¬¥«¥¦¥ó¥È¤µ¤ì¤ë¡£
¤·¤«¤·¡¢¤³¤ÎÀ©¸Â¤Ï
.BR sigqueue (2)
¤ËÂФ·¤Æ¤·¤«¶¯À©¤µ¤ì¤º¡¢
.BR kill (2)
»È¤¦¤³¤È¤Ç¡¢¤½¤Î¥×¥í¥»¥¹¤ËÂФ·¤Æ¤Þ¤À¥­¥å¡¼¤ËÆþ¤ì¤é¤ì¤Æ¤¤¤Ê¤¤
¥·¥°¥Ê¥ë¤Î¥¤¥ó¥¹¥¿¥ó¥¹¤ò¥­¥å¡¼¤ËÆþ¤ì¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.\" ¤³¤ì¤Ï¥«¡¼¥Í¥ë 2.6.7 °ÊÁ°¤Ë¸ºß¤¹¤ë¥·¥¹¥Æ¥àÁ´ÂΤÎÀ©¸Â
.\" /proc/sys/kernel/rtsig-max ¤òÃÖ¤­´¹¤¨¤ë¡£MTK Dec 04
.TP
.B RLIMIT_STACK
¥×¥í¥»¥¹¡¦¥¹¥¿¥Ã¥¯¤ÎºÇÂ祵¥¤¥º¤ò¥Ð¥¤¥Èñ°Ì¤Ç»ØÄꤹ¤ë¡£
¤³¤Î¾å¸Â¤Ë㤹¤ë¤È¡¢
.B SIGSEGV
¥·¥°¥Ê¥ë¤¬À¸À®¤µ¤ì¤ë¡£
¤³¤Î¥·¥°¥Ê¥ë¤ò°·¤¦¤¿¤á¤Ë¤Ï¡¢
¥×¥í¥»¥¹¤ÏÂå¤ê¤Î¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯
.RB ( sigaltstack (2))
¤ò»ÈÍѤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

Linux 2.6.23 °Ê¹ß¤Ç¤Ï¡¢¤³¤ÎÀ©¸Â¤Ï¥×¥í¥»¥¹¤Î¥³¥Þ¥ó¥É¥é¥¤¥ó°ú¤­¿ô¤È´Ä¶­ÊÑ¿ô
¤Ë»ÈÍѤµ¤ì¤ë¶õ´Ö¤Î¹ç·×¥µ¥¤¥º¤Î¾å¸Â¤Î·èÄê¤Ë¤â»ÈÍѤµ¤ì¤ë¡£¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï
.BR execve (2)
¤ò»²¾È¡£
.SH ÊÖ¤êÃÍ
À®¸ù¤·¤¿¾ì¹ç¤Ï 0 ¤¬ÊÖ¤µ¤ì¤ë¡£¥¨¥é¡¼¤Î¾ì¹ç¤Ï \-1 ¤¬ÊÖ¤µ¤ì¡¢
.I errno
¤ËŬÀÚ¤ÊÃͤ¬ÀßÄꤵ¤ì¤ë¡£
.SH ¥¨¥é¡¼
.TP
.B EFAULT
.I rlim
¤¬¥¢¥¯¥»¥¹²Äǽ¤Ê¥¢¥É¥ì¥¹¶õ´Ö¤Î³°¤ò»Ø¤·¤Æ¤¤¤ë¡£
.TP
.B EINVAL
.I resource
¤¬Í­¸ú¤Ç¤Ê¤¤¡£
¤Þ¤¿¤Ï¡¢
.BR setrlimit ()
¤Ç¡¢
.I rlim\->rlim_cur
¤¬
.I rlim\->rlim_max
¤è¤ê¤âÂ礭¤«¤Ã¤¿¡£
.TP
.B EPERM
Æø¢¤Î¤Ê¤¤¥×¥í¥»¥¹¤¬
.BR setrlimit ()
¤ò»ÈÍѤ·¤Æ
¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Þ¤¿¤Ï¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤ò
¸½ºß¤Î¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤è¤êÂ礭¤¯¤·¤è¤¦¤È»î¤ß¤¿¡£
¤³¤ì¤ò¹Ô¤¦¤¿¤á¤Ë¤Ï
.B CAP_SYS_RESOURCE
¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤¬É¬ÍפǤ¢¤ë¡£
¤Þ¤¿¤ÏÆø¢¤Î¤Ê¤¤¥×¥í¥»¥¹¤¬
.BR setrlimit ()
¤ò»ÈÍѤ·¤Æ
¥½¥Õ¥È¤Þ¤¿¤Ï¥Ï¡¼¥É
.B RLIMIT_NOFILE
¥ê¥ß¥Ã¥È¤ò¸½ºß¤Î¥«¡¼¥Í¥ë¤ÎºÇÂçÃÍ
.RB ( NR_OPEN )
°Ê¾å¤ËÁý²Ã¤µ¤»¤è¤¦¤È¤·¤¿¡£
.SH ½àµò
SVr4, 4.3BSD, POSIX.1-2001.
.B RLIMIT_MEMLOCK
¤È
.B RLIMIT_NPROC
¤Ï BSD ¤«¤éÇÉÀ¸¤·¡¢POSIX.1-2001 ¤Ë¤Ï»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¡£
¤³¤ì¤é¤Ï BSD ·Ï¤È Linux ¤Ë¸ºß¤¹¤ë¤¬¡¢Â¾¤Î¼ÂÁõ¤Ï¾¯¤Ê¤¤¡£
.R RLIMIT_RSS
¤Ï BSD ¤«¤éÇÉÀ¸¤·¡¢POSIX.1-2001 ¤Ë¤Ï»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¡£
¤½¤ì¤Ë¤â´Ø¤ï¤é¤ºÂ¿¤¯¤Î¼ÂÁõ¤Ç¸ºß¤¹¤ë¡£
.BR RLIMIT_MSGQUEUE ,
.BR RLIMIT_NICE ,
.BR RLIMIT_RTPRIO ,
.BR RLIMIT_RTTIME ,
.B RLIMIT_SIGPENDING
¤Ï Linux ¸ÇÍ­¤Î¤â¤Î¤Ç¤¢¤ë¡£
.SH Ãí°Õ
.BR fork (2)
¤ÇºîÀ®¤µ¤ì¤¿ºîÀ®¤µ¤ì¤¿»Ò¥×¥í¥»¥¹¤Ï¡¢
¿Æ¥×¥í¥»¥¹¤Î¥ê¥½¡¼¥¹À©¸Â¤ò·Ñ¾µ¤¹¤ë¡£
.BR execve (2)
¤ÎÁ°¸å¤Ç¥ê¥½¡¼¥¹À©¸Â¤ÏÊݸ¤µ¤ì¤ë¡£

¥·¥§¥ë¤Î¥ê¥½¡¼¥¹À©¸Â¤Ï¡¢¥·¥§¥ë¤ÎÁȤ߹þ¤ß¥³¥Þ¥ó¥É¤Ç¤¢¤ë
.I ulimit
.RB ( csh (1)
¤Ç¤Ï
.I limit )
¤ò»È¤Ã¤ÆÀßÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¤³¤Î¥·¥§¥ë¤Î¥ê¥½¡¼¥¹À©¸Â¤Ï¡¢¥³¥Þ¥ó¥É¤ò¼Â¹Ô¤·¤Æ¥·¥§¥ë¤¬À¸À®¤¹¤ë¥×¥í¥»¥¹
¤Ë°ú¤­·Ñ¤¬¤ì¤ë¡£

¸Å¤¤¥·¥¹¥Æ¥à¤Ç¤Ï¡¢
.BR setrlimit ()
¤ÈƱÍͤÎÌÜŪ¤ò»ý¤Ä´Ø¿ô
.BR vlimit ()
¤¬Ä󶡤µ¤ì¤Æ¤¤¤¿¡£
¸åÊý¸ß´¹À­¤Î¤¿¤á¡¢glibc ¤Ç¤â
.BR vlimit ()
¤òÄ󶡤·¤Æ¤¤¤ë¡£
Á´¤Æ¤Î¿·¤·¤¤¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤Ç¤Ï¡¢
.BR setrlimit ()
¤ò»ÈÍѤ¹¤Ù¤­¤Ç¤¢¤ë¡£
.SH ¥Ð¥°
°ÊÁ°¤Î Linux ¥«¡¼¥Í¥ë¤Ç¤Ï¡¢¥×¥í¥»¥¹¤¬¥½¥Õ¥È¤Þ¤¿¤Ï¥Ï¡¼¥É
.B RLIMIT_CPU
¥ê¥ß¥Ã¥È¤Ë㤷¤¿¾ì¹ç¤ËÁ÷¤é¤ì¤ë
.B SIGXCPU
¤È
.B SIGKILL
¥·¥°¥Ê¥ë¤¬¡¢ËÜÍèÁ÷¤é¤ì¤ë¤Ù¤­»þÅÀ¤Î 1 (CPU) Éøå¤ËÁ÷¤é¤ì¤Æ¤·¤Þ¤¦¡£
¤³¤ì¤Ï¥«¡¼¥Í¥ë 2.6.8 ¤Ç½¤Àµ¤µ¤ì¤¿¡£

2.6.17 ¤è¤êÁ°¤Î 2.6.x ¥«¡¼¥Í¥ë¤Ç¤Ï¡¢
.B RLIMIT_CPU
¥ê¥ß¥Ã¥È¤¬ 0 ¤Î¾ì¹ç¡¢
.RB ( RLIM_INFINITY
¤ÈƱ¤¸¤è¤¦¤Ë) ¡ÖÀ©¸Â¤Ê¤·¡×¤È´Ö°ã¤Ã¤Æ²ò¼á¤µ¤ì¤Æ¤¤¤¿¡£
Linux 2.6.17 °Ê¹ß¤Ç¤Ï¡¢¥ê¥ß¥Ã¥È¤ò 0 ¤ËÀßÄꤷ¤¿¾ì¹ç¤Ë¤â
¸ú²Ì¤ò»ý¤Ä¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤¬¡¢¼ÂºÝ¤Ë¤Ï¥ê¥ß¥Ã¥È¤ÎÃÍ¤Ï 1 ÉäȤʤ롣
.\" see http://marc.theaimsgroup.com/?l=linux-kernel&m=114008066530167&w=2

¥«¡¼¥Í¥ë 2.6.12 ¤Ë¤Ï¡¢
.B RLIMIT_RTPRIO
¤¬Æ°ºî¤·¤Ê¤¤¤È¤¤¤¦¥Ð¥°¤¬¤¢¤ë¡£¤³¤ÎÌäÂê¤Ï¥«¡¼¥Í¥ë 2.6.13 ¤Ç½¤Àµ¤µ¤ì¤Æ¤¤¤ë¡£

¥«¡¼¥Í¥ë 2.6.12 ¤Ç¤Ï¡¢
.BR getpriority (2)
¤È
.B RLIMIT_NICE
¤¬ÊÖ¤¹Í¥ÀèÅÙ¤ÎÈϰϤ¬°ì¤Ä¤º¤ì¤Æ¤¤¤¿¡£¤³¤Î¤¿¤á¡¢nice Ãͤμºݤξå¸Â¤¬
.I "19\ \-\ rlim_cur"
¤Ë¤Ê¤Ã¤Æ¤·¤Þ¤¦¤È¤¤¤¦±Æ¶Á¤¬¤¢¤Ã¤¿¡£¤³¤ì¤Ï¥«¡¼¥Í¥ë 2.6.13 ¤Ç½¤Àµ¤µ¤ì¤¿¡£
.\" »²¹Í: http://marc.theaimsgroup.com/?l=linux-kernel&m=112256338703880&w=2

2.4.22 ¤è¤êÁ°¤Î¥«¡¼¥Í¥ë¤Ç¤Ï¡¢
.I rlim\->rlim_cur
¤¬
.I rlim\->rlim_max
¤è¤êÂ礭¤«¤Ã¤¿¾ì¹ç¡¢
.BR setrlimit ()
¤Ç¤Î
.B EINVAL
¥¨¥é¡¼¤ò¸¡½Ð¤Ç¤­¤Ê¤¤¡£
.SH ´ØÏ¢¹àÌÜ
.BR dup (2),
.BR fcntl (2),
.BR fork (2),
.BR getrusage (2),
.BR mlock (2),
.BR mmap (2),
.BR open (2),
.BR quotactl (2),
.BR sbrk (2),
.BR shmctl (2),
.BR sigqueue (2),
.BR malloc (3),
.BR ulimit (3),
.BR core (5),
.BR capabilities (7),
.BR signal (7)