1 .\" Copyright 1993 Giorgio Ciucci (giorgio@crcc.it)
2 .\" and Copyright 2004, 2005 Michael Kerrisk <mtk.manpages@gmail.com>
4 .\" Permission is granted to make and distribute verbatim copies of this
5 .\" manual provided the copyright notice and this permission notice are
6 .\" preserved on all copies.
8 .\" Permission is granted to copy and distribute modified versions of this
9 .\" manual under the conditions for verbatim copying, provided that the
10 .\" entire resulting derived work is distributed under the terms of a
11 .\" permission notice identical to this one.
13 .\" Since the Linux kernel and libraries are constantly changing, this
14 .\" manual page may be incorrect or out-of-date. The author(s) assume no
15 .\" responsibility for errors or omissions, or for damages resulting from
16 .\" the use of the information contained herein. The author(s) may not
17 .\" have taken the same level of care in the production of this manual,
18 .\" which is licensed free of charge, as they might when working
21 .\" Formatted or processed versions of this manual, if unaccompanied by
22 .\" the source, must acknowledge the copyright and authors of this work.
24 .\" Modified Tue Oct 22 17:53:56 1996 by Eric S. Raymond <esr@thyrsus.com>
25 .\" Modified Fri Jun 19 10:59:15 1998 by Andries Brouwer <aeb@cwi.nl>
26 .\" Modified Sun Feb 18 01:59:29 2001 by Andries Brouwer <aeb@cwi.nl>
27 .\" Modified 20 Dec 2001, Michael Kerrisk <mtk.manpages@gmail.com>
28 .\" Modified 21 Dec 2001, aeb
29 .\" Modified 27 May 2004, Michael Kerrisk <mtk.manpages@gmail.com>
30 .\" Added notes on CAP_IPC_OWNER requirement
31 .\" Modified 17 Jun 2004, Michael Kerrisk <mtk.manpages@gmail.com>
32 .\" Added notes on CAP_SYS_ADMIN requirement for IPC_SET and IPC_RMID
33 .\" Modified, 11 Nov 2004, Michael Kerrisk <mtk.manpages@gmail.com>
34 .\" Language and formatting clean-ups
35 .\" Rewrote semun text
36 .\" Added semid_ds and ipc_perm structure definitions
37 .\" 2005-08-02, mtk: Added IPC_INFO, SEM_INFO, SEM_STAT descriptions.
39 .\" Japanese Version Copyright (c) 1997,1998 HANATAKA Shinya
40 .\" all rights reserved.
41 .\" Translated 1997-02-23, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
42 .\" Modified 1998-09-10, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
43 .\" Updated & Modified 2001-06-03, Yuichi SATO <ysato@h4.dion.ne.jp>
44 .\" Updated & Modified 2002-01-02, Yuichi SATO
45 .\" Updated & Modified 2005-01-03, Yuichi SATO <ysato444@yahoo.co.jp>
46 .\" Updated & Modified 2005-10-10, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
48 .\"WORD: semaphore ¥»¥Þ¥Õ¥©
49 .\"WORD: semaphore set ¥»¥Þ¥Õ¥©½¸¹ç
51 .\"WORD: buffer ¥Ð¥Ã¥Õ¥¡
52 .\"WORD: member ¥á¥ó¥Ð¡¼
53 .\"WORD: superuser ¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶
54 .\"WORD: effective uid ¼Â¸ú¥æ¡¼¥¶ ID
55 .\"WORD: creator ºîÀ®¼Ô
57 .\"WORD: entry ¥¨¥ó¥È¥ê
58 .\"WORD: undo ¥¢¥ó¥É¥¥
59 .\"WORD: implement ¼ÂÁõ
60 .\"WORD: feature test macro µ¡Ç½¸¡ºº¥Þ¥¯¥í
62 .TH SEMCTL 2 2009-09-27 "Linux" "Linux Programmer's Manual"
64 semctl \- ¥»¥Þ¥Õ¥©¤ÎÀ©¸æÁàºî¤ò¹Ô¤Ê¤¦
67 .B #include <sys/types.h>
68 .B #include <sys/ipc.h>
69 .B #include <sys/sem.h>
71 .BI "int semctl(int " semid ", int " semnum ", int " cmd ", ...);"
77 ¤Ç»ØÄꤵ¤ì¤¿¥»¥Þ¥Õ¥©½¸¹ç (semaphore set)
80 ÈÖÌܤΥ»¥Þ¥Õ¥©¤ËÂФ·¤Æ¡¢
82 ¤Ç»ØÄꤵ¤ì¤¿À©¸æÁàºî¤ò¹Ô¤Ê¤¦
83 (½¸¹çÆâ¤Î¥»¥Þ¥Õ¥©¤ÎÈÖ¹æ¤Ï 0 ¤«¤é»Ï¤Þ¤ë)¡£
87 ¤ÎÃͤ˰͸¤·¤Æ¡¢3 ¸Ä¤Þ¤¿¤Ï 4 ¸Ä¤Î°ú¤¿ô¤ò»ý¤Ä¡£
88 °ú¤¿ô¤¬ 4 ¸Ä¤Î¾ì¹ç¡¢Âè 4 °ú¤¿ô¤Î·¿¤Ï
91 \fI¸Æ¤Ó½Ð¤·¸µ¥×¥í¥°¥é¥à\fP¤Ï¡¢
92 ¤³¤Î¶¦ÍÑÂÎ (union) ¤ò°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
97 int val; /* SETVAL ¤ÎÃÍ */
98 struct semid_ds *buf; /* IPC_STAT, IPC_SET ÍѤΥХåե¡ */
99 unsigned short *array; /* GETALL, SETALL ÍѤÎÇÛÎó */
100 struct seminfo *__buf; /* IPC_INFO ÍѤΥХåե¡
107 ¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ï \fI<sys/sem.h>\fP ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë:
112 struct ipc_perm sem_perm; /* ½ê͸¢¤Èµö²Ä */
113 time_t sem_otime; /* ºÇ¸å¤Î semop ¤Î»þ¹ï */
114 time_t sem_ctime; /* ºÇ¸å¤ËÊѹ¹¤¬¹Ô¤ï¤ì¤¿»þ¹ï */
115 unsigned short sem_nsems; /* ½¸¹çÆâ¤Î¥»¥Þ¥Õ¥©¤Î¿ô */
123 ¹½Â¤ÂÎ¤Ï \fI<sys/ipc.h>\fP ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë
124 (¶¯Ä´¤µ¤ì¤¿¥Õ¥£¡¼¥ë¥É¤Ï
126 ¤ò»È¤Ã¤ÆÀßÄê²Äǽ¤Ç¤¢¤ë):
131 key_t __key; /* semget(2) ¤ËÍ¿¤¨¤é¤ì¤ë¥¡¼ */
132 uid_t \fBuid\fP; /* ½êÍ¼Ô (owner) ¤Î¼Â¸ú UID */
133 gid_t \fBgid\fP; /* ½êͼԤμ¸ú GID */
134 uid_t cuid; /* ºîÀ®¼Ô (creator) ¤Î¼Â¸ú UID */
135 gid_t cgid; /* ºîÀ®¼Ô¤Î¼Â¸ú GID */
136 unsigned short \fBmode\fP; /* µö²Ä */
137 unsigned short __seq; /* ¥·¡¼¥±¥ó¥¹ÈÖ¹æ */
147 ¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿¥«¡¼¥Í¥ë¥Ç¡¼¥¿¹½Â¤ÂΤξðÊó¤ò
154 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Ï¤½¤Î¥»¥Þ¥Õ¥©½¸¹ç¤ËÂФ¹¤ë
155 Æɤ߹þ¤ßµö²Ä¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
161 ¹½Â¤ÂΤΥá¥ó¥Ð¡¼¤Î¤¤¤¯¤Ä¤«¤ÎÃͤò¡¢
162 ¤³¤Î¥»¥Þ¥Õ¥©¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿¥«¡¼¥Í¥ë¥Ç¡¼¥¿¹½Â¤ÂΤ˽ñ¤¹þ¤ß¡¢
164 ¥á¥ó¥Ð¡¼¤ÎÃͤ⹹¿·¤¹¤ë¡£
165 ¹½Â¤ÂΤΰʲ¼¤Î¥á¥ó¥Ð¡¼¤¬¹¹¿·¤µ¤ì¤ë:
169 (¤ÎºÇ²¼°Ì 9 ¥Ó¥Ã¥È)¡£
170 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¸ú UID ¤¬½êͼÔ
173 .RI ( sem_perm.cuid )
174 ¤È°ìÃפ¹¤ë¤«¡¢¸Æ¤Ó½Ð¤·¤¿¿Í¤¬Æø¢¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
179 ¥»¥Þ¥Õ¥©½¸¹ç¤ò¤¿¤À¤Á¤Ëºï½ü¤·¡¢¤½¤Î½¸¹ç¾å¤Î
181 ¥³¡¼¥ë¤Ç¥Ö¥í¥Ã¥¯¤µ¤ì¤Æ¤¤¤ëÁ´¤Æ¤Î¥×¥í¥»¥¹¤òÌܳФᤵ¤»¤ë
182 (¥¨¥é¡¼Ãͤ¬ÊÖ¤µ¤ì¤Æ¡¢
187 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¸ú¥æ¡¼¥¶ ID ¤¬
188 ¤½¤Î¥»¥Þ¥Õ¥©½¸¹ç¤ÎºîÀ®¼Ô¤Þ¤¿¤Ï½êͼԤȰìÃפ¹¤ë¤«¡¢
189 ¸Æ¤Ó½Ð¤·¤¿¿Í¤¬Æø¢¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
193 .BR IPC_INFO " (Linux ¸ÇÍ)"
194 ¥·¥¹¥Æ¥àÁ´ÂΤǤΥ»¥Þ¥Õ¥©¤ÎÀ©¸Â¤È¥Ñ¥é¥á¡¼¥¿¤Ë´Ø¤¹¤ë¾ðÊó¤ò¡¢
196 ¤¬»Ø¤¹¹½Â¤ÂΤËÆþ¤ì¤ÆÊÖ¤¹¡£
203 µ¡Ç½¸¡ºº¥Þ¥¯¥í¤¬ÄêµÁ¤µ¤ì¤¿¾ì¹ç¤Ë
205 ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤ë:
210 int semmap; /* ¥»¥Þ¥Õ¥©¡¦¥Þ¥Ã¥×¤ÎºÇÂ票¥ó¥È¥ê¿ô;
211 ¥«¡¼¥Í¥ëÆâ¤Ç¤Ï̤»ÈÍÑ */
212 int semmni; /* ¥»¥Þ¥Õ¥©½¸¹ç¤ÎºÇÂç¿ô */
213 int semmns; /* Á´¥»¥Þ¥Õ¥©½¸¹çÃæ¤Î¥»¥Þ¥Õ¥©¤Î
215 int semmnu; /* ¥¢¥ó¥É¥¥¹½Â¤ÂΤΥ·¥¹¥Æ¥àÁ´ÂΤǤÎ
216 ºÇÂç¿ô; ¥«¡¼¥Í¥ëÆâ¤Ç¤Ï̤»ÈÍÑ */
217 int semmsl; /* °ì¤Ä¤Î¥»¥Þ¥Õ¥©½¸¹ç¤ÎºÇÂ祻¥Þ¥Õ¥©¿ô */
218 int semopm; /* semop(2) ¤ËÅϤ¹Áàºî¤ÎºÇÂç¿ô */
219 int semume; /* ¥×¥í¥»¥¹¤¢¤¿¤ê¤Î¥¢¥ó¥É¥¥¡¦¥¨¥ó¥È¥ê
220 ¤ÎºÇÂç¿ô; ¥«¡¼¥Í¥ëÆâ¤Ç¤Ï̤»ÈÍÑ */
221 int semusz; /* ¹½Â¤ÂÎ sem_undo ¤Î¥µ¥¤¥º */
222 int semvmx; /* ¥»¥Þ¥Õ¥©¤ÎºÇÂçÃÍ */
223 int semaem; /* ¥»¥Þ¥Õ¥©¤ÎÄ´À° (semaphore adjustment;
224 SEM_UNDO) ¤Î¤¿¤á¤ËµÏ¿¤µ¤ì¤ëºÇÂçÃÍ */
235 .I /proc/sys/kernel/sem
236 ·Ðͳ¤ÇÊѹ¹²Äǽ¤Ç¤¢¤ë¡£
241 .BR SEM_INFO " (Linux ¸ÇÍ)"
243 ¤Î¤È¤¤ÈƱ¤¸¾ðÊó¤ò³ÊǼ¤·¤¿
246 ⤷¡¢°Ê²¼¤Î¥Õ¥£¡¼¥ë¥É¤Ë¤Ï¥»¥Þ¥Õ¥©¤¬¾ÃÈñ¤·¤Æ¤¤¤ë¥·¥¹¥Æ¥à»ñ¸»¤Ë
247 ´Ø¤¹¤ë¾ðÊ󤬳ÊǼ¤µ¤ì¤ëÅÀ¤¬°Û¤Ê¤ë¡£
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251 ¥Õ¥£¡¼¥ë¥É¤Ï¥·¥¹¥Æ¥à¾å¤ÎÁ´¤Æ¤Î¥»¥Þ¥Õ¥©½¸¹ç¤Ë´Þ¤Þ¤ì¤ë
252 ¥»¥Þ¥Õ¥©¤ÎÁí¿ô¤òÊÖ¤¹¡£
254 .BR SEM_STAT " (Linux ¸ÇÍ)"
261 °ú¤¿ô¤Ï¡¢¥»¥Þ¥Õ¥©¼±Ê̻ҤǤϤʤ¯¡¢¥·¥¹¥Æ¥à¾å¤ÎÁ´¤Æ¤Î¥»¥Þ¥Õ¥©½¸¹ç
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275 ¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï½¸¹ç¤Î
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293 ÈÖÌܤΥ»¥Þ¥Õ¥©¤ËºÇ¸å¤Ë
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422 ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£ (capability) ¤ò»ý¤Ã¤Æ¤¤¤Ê¤¤¡£
428 ¤Ç»Ø¤µ¤ì¤Æ¤¤¤ë¥¢¥É¥ì¥¹¤Ë¥¢¥¯¥»¥¹¤¹¤ë¤³¤È¤¬¤Ç¤¤Ê¤¤¡£
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450 ¤¬»ØÄꤵ¤ì¡¢¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¸ú¥æ¡¼¥¶ ID ¤¬¥»¥Þ¥Õ¥©¤Î
452 ¤Ç¸«¤Ä¤«¤ë) ºîÀ®¼Ô¤Þ¤¿¤Ï
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480 ¾ÍèŪ¤Ë¤Ï¤³¤ì¤é¤ÏÊѹ¹¤µ¤ì¤ë¤«¡¢
481 /proc ¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¡¦¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Ë°ÜÆ°¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
483 \fI¹½Â¤ÂÎ semid_ds\fP Æâ¤Î¿¤¯¤Î¥Õ¥£¡¼¥ë¥É¤Ï¡¢
486 ·¿¤À¤Ã¤¿¤¬¡¢Linux 2.4 ¤Ç¤Ï
489 ¤³¤ÎÍøÅÀ¤òÀ¸¤«¤¹¤Ë¤Ï¡¢glibc-2.1.91 °Ê¹ß¤Î´Ä¶²¼¤Ç
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497 ½é´ü¤Î¥Ð¡¼¥¸¥ç¥ó¤Î glibc ¤Ç¤Ï¡¢
499 ¶¦ÍÑÂÎ¤Ï \fI<sys/sem.h>\fP ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤¿¤¬¡¢
500 POSIX.1-2001 ¤Ç¤Ï¸Æ¤Ó½Ð¤·Â¦¤¬¤³¤Î¶¦ÍÑÂΤòÄêµÁ¤¹¤ëɬÍפ¬¤¢¤ë¡£
501 ¤³¤Î¶¦ÍÑÂΤ¬ÄêµÁ¤µ¤ì¤Æ\fI¤¤¤Ê¤¤\fP glibc ¤Î¥Ð¡¼¥¸¥ç¥ó¤Ç¤Ï¡¢
503 .B _SEM_SEMUN_UNDEFINED
504 ¤¬ \fI<sys/sem.h>\fP ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
508 ¥³¡¼¥ë¤Ë±Æ¶Á¤¹¤ë¥»¥Þ¥Õ¥©½¸¹ç¤Î¥·¥¹¥Æ¥àÀ©¸Â:
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516 ¤ò¸Æ¤Ó½Ð¤¹¤³¤È¤Ç¤¢¤ë¡£
521 .BR capabilities (7),
522 .BR sem_overview (7),