release/man2/shmctl.2

   1 .\" Copyright (c) 1993 Luigi P. Bai (lpb@softint.com) July 28, 1993
   2 .\" and Copyright 1993 Giorgio Ciucci <giorgio@crcc.it>
   3 .\" and Copyright 2004, 2005 Michael Kerrisk <mtk.manpages@gmail.com>
   4 .\"
   5 .\" Permission is granted to make and distribute verbatim copies of this
   6 .\" manual provided the copyright notice and this permission notice are
   7 .\" preserved on all copies.
   8 .\"
   9 .\" Permission is granted to copy and distribute modified versions of this
  10 .\" manual under the conditions for verbatim copying, provided that the
  11 .\" entire resulting derived work is distributed under the terms of a
  12 .\" permission notice identical to this one.
  13 .\"
  14 .\" Since the Linux kernel and libraries are constantly changing, this
  15 .\" manual page may be incorrect or out-of-date.  The author(s) assume no
  16 .\" responsibility for errors or omissions, or for damages resulting from
  17 .\" the use of the information contained herein.  The author(s) may not
  18 .\" have taken the same level of care in the production of this manual,
  19 .\" which is licensed free of charge, as they might when working
  20 .\" professionally.
  21 .\"
  22 .\" Formatted or processed versions of this manual, if unaccompanied by
  23 .\" the source, must acknowledge the copyright and authors of this work.
  24 .\"
  25 .\" Modified 1993-07-28, Rik Faith <faith@cs.unc.edu>
  26 .\" Modified 1993-11-28, Giorgio Ciucci <giorgio@crcc.it>
  27 .\" Modified 1997-01-31, Eric S. Raymond <esr@thyrsus.com>
  28 .\" Modified 2001-02-18, Andries Brouwer <aeb@cwi.nl>
  29 .\" Modified 2002-01-05, 2004-05-27, 2004-06-17,
  30 .\"    Michael Kerrisk <mtk.manpages@gmail.com>
  31 .\" Modified 2004-10-11, aeb
  32 .\" Modified, Nov 2004, Michael Kerrisk <mtk.manpages@gmail.com>
  33 .\"     Language and formatting clean-ups
  34 .\"     Updated shmid_ds structure definitions
  35 .\"     Added information on SHM_DEST and SHM_LOCKED flags
  36 .\"     Noted that CAP_IPC_LOCK is not required for SHM_UNLOCK
  37 .\"             since kernel 2.6.9
  38 .\" Modified, 2004-11-25, mtk, notes on 2.6.9 RLIMIT_MEMLOCK changes
  39 .\" 2005-04-25, mtk -- noted aberrant Linux behavior w.r.t. new
  40 .\"     attaches to a segment that has already been marked for deletion.
  41 .\" 2005-08-02, mtk: Added IPC_INFO, SHM_INFO, SHM_STAT descriptions.
  42 .\"
  43 .\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
  44 .\"         all rights reserved.
  45 .\" Translated 1997-03-01, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
  46 .\" Updated & Modified 2001-06-13, Yuichi SATO <ysato@h4.dion.ne.jp>
  47 .\" Updated & Modified 2005-01-05, Yuichi SATO <ysato444@yahoo.co.jp>
  48 .\" Updated & Modified 2005-09-06, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
  49 .\" Updated & Modified 2005-10-08, Akihiro MOTOKI
  50 .\" Updated 2006-07-21, Akihiro MOTOKI, LDP v2.36
  51 .\"
  52 .\"WORD:        shared memory           ¶¦Í¥á¥â¥ê
  53 .\"WORD:        segment                 ¥»¥°¥á¥ó¥È
  54 .\"WORD:        owner                   ½êÍ¼Ô
  55 .\"WORD:        group                   ¥°¥ë¡¼¥×
  56 .\"WORD:        creator                 ºîÀ®¼Ô
  57 .\"WORD:        super-user              ¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶¡¼
  58 .\"WORD:        detach                  ʬΥ
  59 .\"WORD:        attach                  ÉÕ²Ã
  60 .\"WORD:        swap                    ¥¹¥ï¥Ã¥×
  61 .\"WORD:        identifier              ¼±ÊÌ»Ò
  62 .\"WORD:        member                  ¥á¥ó¥Ð¡¼
  63 .\"WORD:        feature test macro      µ¡Ç½¸¡ºº¥Þ¥¯¥í
  64 .\"
  65 .TH SHMCTL 2 2008-08-07 "Linux" "Linux Programmer's Manual"
  66 .SH Ì¾Á°
  67 shmctl \- ¶¦Í¥á¥â¥ê (shared memory) ¤òÀ©¸æ¤¹¤ë
  68 .SH ½ñ¼°
  69 .ad l
  70 .B #include <sys/ipc.h>
  71 .br
  72 .B #include <sys/shm.h>
  73 .sp
  74 .BI "int shmctl(int " shmid ", int " cmd ", struct shmid_ds *" buf );
  75 .ad b
  76 .SH ÀâÌÀ
  77 .BR shmctl ()
  78 ¤Ï¡¢¼±ÊÌ»Ò¤¬
  79 .I shmid
  80 ¤Î¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤ËÂÐ¤·¤Æ
  81 .I cmd
  82 ¤Ç»Ø¼¨¤·¤¿À©¸æÌ¿Îá¤ò¼Â¹Ô¤¹¤ë¡£
  83 .PP
  84 .I buf
  85 °ú¤¿ô¤Ï¡¢ \fIshmid_ds\fP ¹½Â¤ÂÎ¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£
  86 ¤³¤Î¹½Â¤ÂÎ¤Ï \fI<sys/shm.h>\fP ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë
  87 .PP
  88 .in +4n
  89 .nf
  90 struct shmid_ds {
  91     struct ipc_perm shm_perm;    /* ½êÍ¸¢¤Èµö²Ä */
  92     size_t          shm_segsz;   /* ¥»¥°¥á¥ó¥È¤Î¥µ¥¤¥º (¥Ð¥¤¥È) */
  93     time_t          shm_atime;   /* ºÇ¸å¤ÎÉÕ²Ã (attach) ¤Î»þ¹ï */
  94     time_t          shm_dtime;   /* ºÇ¸å¤ÎÊ¬Î¥ (detach) ¤Î»þ¹ï */
  95     time_t          shm_ctime;   /* ºÇ¸å¤ËÊÑ¹¹¤¬¹Ô¤ï¤ì¤¿»þ¹ï */
  96     pid_t           shm_cpid;    /* ºîÀ®¼Ô (creator) ¤Î PID */
  97     pid_t           shm_lpid;    /* ºÇ¸å¤Î shmat(2)/shmdt(2) ¤Î PID */
  98     shmatt_t        shm_nattch;  /* ¸½ºßÉÕ²Ã¤µ¤ì¤Æ¤¤¤ë¿ô */
  99     ...
 100 };
 101 .fi
 102 .in
 103 .PP
 104 .I ipc_perm
 105 ¹½Â¤ÂÎ¤Ï \fI<sys/ipc.h>\fP ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë
 106 (¶¯Ä´¤µ¤ì¤¿¥Õ¥£¡¼¥ë¥É¤Ï
 107 .B IPC_SET
 108 ¤ò»È¤Ã¤ÆÀßÄê²ÄÇ½¤Ç¤¢¤ë):
 109 .PP
 110 .in +4n
 111 .nf
 112 struct ipc_perm {
 113     key_t          __key;    /* shmget(2) ¤ËÍ¿¤¨¤é¤ì¤ë¥¡¼ */
 114     uid_t          \fBuid\fP;      /* ½êÍ¼Ô¤Î¼Â¸ú UID */
 115     gid_t          \fBgid\fP;      /* ½êÍ¼Ô¤Î¼Â¸ú GID */
 116     uid_t          cuid;     /* ºîÀ®¼Ô¤Î¼Â¸ú UID */
 117     gid_t          cgid;     /* ºîÀ®¼Ô¤Î¼Â¸ú GID */
 118     unsigned short \fBmode\fP;     /* \fBµö²Ä\fP + SHM_DEST ¤È
 119                                 SHM_LOCKED ¥Õ¥é¥° */
 120     unsigned short __seq;    /* ¥·¡¼¥±¥ó¥¹ÈÖ¹æ */
 121 };
 122 .fi
 123 .in
 124 .PP
 125 .I cmd
 126 ¤È¤·¤ÆÍ¸ú¤ÊÃÍ¤Ï°Ê²¼¤ÎÄÌ¤ê:
 127 .br
 128 .TP 10
 129 .B IPC_STAT
 130 .I shmid
 131 ¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿¥«¡¼¥Í¥ë¥Ç¡¼¥¿¹½Â¤ÂÎ¤Î¾ðÊó¤ò
 132 \fIbuf\fP ¤Ç»Ø¤µ¤ì¤¿
 133 .I shmid_ds
 134 ¹½Â¤ÂÎ¤Ë¥³¥Ô¡¼¤¹¤ë¡£
 135 ¸Æ¤Ó½Ð¤·¸µ¤Ï¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤ËÂÐ¤¹¤ë
 136 ÆÉ¤ß¹þ¤ßµö²Ä¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
 137 .TP
 138 .B IPC_SET
 139 .I buf
 140 ¤Ë¤è¤Ã¤Æ»Ø¤µ¤ì¤ë
 141 .I shmid_ds
 142 ¹½Â¤ÂÎ¤Î¤¤¤¯¤Ä¤«¤Î¥á¥ó¥Ð¡¼¤ÎÃÍ¤ò¡¢
 143 ¤³¤Î¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿¥«¡¼¥Í¥ë¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ë½ñ¤¹þ¤ß¡¢
 144 .I shm_ctime
 145 ¥á¥ó¥Ð¡¼¤â¹¹¿·¤¹¤ë¡£
 146 °Ê²¼¤Î¥Õ¥£¡¼¥ë¥É¤ÏÊÑ¹¹¤Ç¤¤ë¡£
 147 \fIshm_perm.uid\fP, \fIshm_perm.gid\fP,
 148 \fIshm_perm.mode\fP (¤ÎºÇ²¼°Ì 9 ¥Ó¥Ã¥È)¡£
 149 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¸ú UID ¤¬½êÍ¼Ô
 150 .RI ( shm_perm.uid )
 151 ¤Þ¤¿¤ÏºîÀ®¼Ô
 152 .RI ( shm_perm.cuid )
 153 ¤È°ìÃ×¤¹¤ë¤«¡¢¸Æ¤Ó½Ð¤·¸µ¤¬ÆÃ¸¢¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
 154 .TP
 155 .B IPC_RMID
 156 ¥»¥°¥á¥ó¥È¤ËÇË´þºÑ¤ß¤Î¥Þ¡¼¥¯¤òÉÕ¤±¤ë¡£
 157 ¥»¥°¥á¥ó¥È¤Ï¡¢¼ÂºÝ¤Ë¤ÏºÇ¸å¥×¥í¥»¥¹¤¬¥»¥°¥á¥ó¥È¤òÊ¬Î¥¤·¤¿ (´ØÏ¢¤¹¤ë
 158 .I shmid_ds
 159 ¹½Â¤ÂÎ¤Î
 160 .I shm_nattch
 161 ¥á¥ó¥Ð¡¼¤¬ 0 ¤Ë¤Ê¤Ã¤¿) ¸å¤Ç¤Î¤ßÇË´þ¤µ¤ì¤ë¡£
 162 ¸Æ¤Ó½Ð¤·¸µ¤Ï½êÍ¼Ô¤«ºîÀ®¼Ô¤Ç¤¢¤ë¤«¡¢ÆÃ¸¢¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
 163 ¥»¥°¥á¥ó¥È¤ËÇË´þ¤Î¥Þ¡¼¥¯¤¬ÉÕ¤±¤é¤ì¤ë¤È¡¢
 164 ´ØÏ¢¤¹¤ë¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ë¤ª¤¤¤Æ
 165 .I shm_perm.mode
 166 ¥Õ¥£¡¼¥ë¥É¤Î (É¸½à¤Ç¤Ï¤Ê¤¤)
 167 .B SHM_DEST
 168 ¥Õ¥é¥°¤¬ÀßÄê¤µ¤ì¤ë¡£
 169 ¤³¤Î¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ï
 170 .B IPC_STAT
 171 ¤Ç¼èÆÀ¤µ¤ì¤ë¡£
 172 .PP
 173 ¸Æ¤Ó½Ð¤·¸µ¤ÏºÇ½ªÅª¤Ë¤Ï¥»¥°¥á¥ó¥È¤òËº¤ì¤º¤ËÇË´þ\fI¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤\fP¡£
 174 ¤½¤¦¤Ç¤Ê¤ì¤Ð¡¢¥Õ¥©¡¼¥ë¥È (fault) ¤µ¤ì¤¿¥Ú¡¼¥¸¤Ï
 175 ¥á¥â¥ê¤«¥¹¥ï¥Ã¥× (swap) ¤Ë»Ä¤êÂ³¤±¤ë¡£
 176 .TP 10
 177 .BR IPC_INFO " (Linux ¸ÇÍ)"
 178 ¥·¥¹¥Æ¥àÁ´ÂÎ¤Ç¤Î¶¦Í¥á¥â¥ê¤ÎÀ©¸Â¤È¥Ñ¥é¥á¡¼¥¿¤Ë´Ø¤¹¤ë¾ðÊó¤ò¡¢
 179 .I buf
 180 ¤¬»Ø¤¹¹½Â¤ÂÎ¤ËÆþ¤ì¤ÆÊÖ¤¹¡£
 181 ¤³¤Î¹½Â¤ÂÎ¤Ï
 182 .I shminfo
 183 ·¿¤Ç¤¢¤ë (¤½¤Î¤¿¤á¥¥ã¥¹¥È¤¬É¬Í×¤Ç¤¢¤ë)¡£
 184 .I shminfo
 185 ¤Ï
 186 .B _GNU_SOURCE
 187 µ¡Ç½¸¡ºº¥Þ¥¯¥í¤¬ÄêµÁ¤µ¤ì¤¿¾ì¹ç¤Ë
 188 .I <sys/shm.h>
 189 ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤ë:
 190 .nf
 191 .in +4n
 192
 193 struct  shminfo {
 194     unsigned long shmmax; /* ºÇÂç¥»¥°¥á¥ó¥È¥µ¥¤¥º */
 195     unsigned long shmmin; /* ºÇ¾®¥»¥°¥á¥ó¥È¥µ¥¤¥º¡£
 196                              ¾ï¤Ë 1 */
 197     unsigned long shmmni; /* ºÇÂç¥»¥°¥á¥ó¥È¿ô */
 198     unsigned long shmseg; /* ¥×¥í¥»¥¹¤¬ÉÕ²Ã¤Ç¤¤ë
 199                              ¥»¥°¥á¥ó¥È¤ÎºÇÂç¿ô¡£
 200                              ¥«¡¼¥Í¥ëÆâ¤Ç¤ÏÌ¤»ÈÍÑ */
 201     unsigned long shmall; /* ¶¦Í¥á¥â¥ê¤ÎºÇÂç¥Ú¡¼¥¸¿ô¡£
 202                              ¥·¥¹¥Æ¥àÁ´ÂÎ¤Ç¤ÎÃÍ */
 203 };
 204
 205 .in
 206 .fi
 207 ÀßÄê
 208 .IR shmmni ,
 209 .IR shmmax ,
 210 .I shmall
 211 ¤Ï
 212 .I /proc
 213 ¤Ë¤¢¤ëÆ±¤¸Ì¾Á°¤Î¥Õ¥¡¥¤¥ë·ÐÍ³¤ÇÊÑ¹¹²ÄÇ½¤Ç¤¢¤ë¡£
 214 ¾Ü¤·¤¯¤Ï
 215 .BR proc (5)
 216 ¤ò»²¾È¡£
 217 .TP
 218 .BR SHM_INFO " (Linux ¸ÇÍ)"
 219 ¶¦Í¥á¥â¥ê¤¬¾ÃÈñ¤·¤Æ¤¤¤ë¥·¥¹¥Æ¥à»ñ¸»¤Ë´Ø¤¹¤ë¾ðÊó¤ò
 220 ³ÊÇ¼¤·¤¿
 221 .I shm_info
 222 ¹½Â¤ÂÎ¤òÊÖ¤¹¡£
 223 ¤³¤Î¹½Â¤ÂÎ¤Ï¡¢
 224 .B _GNU_SOURCE
 225 µ¡Ç½¸¡ºº¥Þ¥¯¥í¤¬ÄêµÁ¤µ¤ì¤¿¾ì¹ç¤Ë
 226 .I <sys/shm.h>
 227 ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤ë:
 228 .nf
 229 .in +4n
 230
 231 struct shm_info {
 232     int           used_ids; /* ¸½ºßÂ¸ºß¤¹¤ë¥»¥°¥á¥ó¥È¿ô */
 233     unsigned long shm_tot;  /* ¶¦Í¥á¥â¥ê¤Î¥Ú¡¼¥¸Áí¿ô */
 234     unsigned long shm_rss;  /* ¥á¥â¥ê¾å¤Ë¤¢¤ë (¥¹¥ï¥Ã¥×¤µ¤ì¤Æ
 235                                ¤¤¤Ê¤¤) ¶¦Í¥á¥â¥ê¥Ú¡¼¥¸¿ô */
 236     unsigned long shm_swp;  /* ¥¹¥ï¥Ã¥×¤µ¤ì¤Æ¤¤¤ë¶¦Í¥á¥â¥ê
 237                                ¥Ú¡¼¥¸¿ô */
 238     unsigned long swap_attempts;
 239                             /* Linux 2.4 °Ê¹ß¤Ç¤ÏÌ¤»ÈÍÑ */
 240     unsigned long swap_successes;
 241                             /* Linux 2.4 °Ê¹ß¤Ç¤ÏÌ¤»ÈÍÑ */
 242 };
 243 .in
 244 .fi
 245 .TP
 246 .BR SHM_STAT " (Linux ¸ÇÍ)"
 247 .B IPC_STAT
 248 ¤ÈÆ±¤¸¤¯
 249 .I shmid_ds
 250 ¹½Â¤ÂÎ¤òÊÖ¤¹¡£
 251 Ã¢¤·¡¢
 252 .I shmid
 253 °ú¤¿ô¤Ï¡¢¥»¥°¥á¥ó¥È¼±ÊÌ»Ò¤Ç¤Ï¤Ê¤¯¡¢¥·¥¹¥Æ¥à¾å¤ÎÁ´¤Æ¤Î¶¦Í¥á¥â¥ê
 254 ¥»¥°¥á¥ó¥È¤Ë´Ø¤¹¤ë¾ðÊó¤ò´ÉÍý¤¹¤ë¥«¡¼¥Í¥ë¤ÎÆâÉôÇÛÎó¤Ø¤Î¥¤¥ó¥Ç¥Ã¥¯¥¹
 255 ¤Ç¤¢¤ë¡£
 256 .PP
 257 ¸Æ¤Ó½Ð¤·¸µ¤Ï¡¢\fIcmd\fP ¤Ë°Ê²¼¤ÎÃÍ¤ò»ØÄê¤¹¤ë¤³¤È¤Ç¡¢¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤¬
 258 ¥¹¥ï¥Ã¥×¤µ¤ì¤ë¤³¤È¤òËÉ»ß¤·¤¿¤ê¡¢µö²Ä¤·¤¿¤ê¤Ç¤¤ë:
 259 .br
 260 .TP 10
 261 .BR SHM_LOCK " (Linux ¸ÇÍ)"
 262 ¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤ò¥¹¥ï¥Ã¥×¤¹¤ë¤³¤È¤òËÉ»ß¤¹¤ë¡£
 263 ¥í¥Ã¥¯¤¬Í¸ú¤Ë¤Ê¤Ã¤¿¸å¡¢¸Æ¤Ó½Ð¤·¸µ¤Ï¡¢
 264 Â¸ºß¤¹¤ë¤³¤È¤¬Í×µá¤µ¤ì¤¿Á´¤Æ¤Î¥Ú¡¼¥¸¤ò¥Õ¥©¡¼¥ë¥È¤µ¤»¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
 265 ¥»¥°¥á¥ó¥È¤¬¥í¥Ã¥¯¤µ¤ì¤ë¤È¡¢
 266 ´ØÏ¢¤¹¤ë¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ë¤ª¤¤¤Æ
 267 .I shm_perm.mode
 268 ¥Õ¥£¡¼¥ë¥É¤Î (É¸½àÅª¤Ç¤Ï¤Ê¤¤)
 269 .B SHM_LOCKED
 270 ¥Õ¥é¥°¤¬ÀßÄê¤µ¤ì¤ë¡£
 271 ¤³¤Î¥Ç¡¼¥¿¹½Â¤ÂÎ¤Ï
 272 .B IPC_STAT
 273 ¤Ç¼èÆÀ¤µ¤ì¤ë¡£
 274 .TP
 275 .BR SHM_UNLOCK " (Linux ¸ÇÍ)"
 276 ¥»¥°¥á¥ó¥È¤Î¥í¥Ã¥¯¤ò²ò½ü¤·¡¢¥¹¥ï¥Ã¥×¡¦¥¢¥¦¥È¤¹¤ë¤³¤È¤ò²ÄÇ½¤Ë¤¹¤ë¡£
 277 .PP
 278 2.6.10 ¤è¤êÁ°¤Î¥«¡¼¥Í¥ë¤Ç¤Ï¡¢ÆÃ¸¢¥×¥í¥»¥¹¤À¤±¤¬
 279 .B SHM_LOCK
 280 ¤È
 281 .B SHM_UNLOCK
 282 ¤òÍøÍÑ¤¹¤ë¤³¤È¤¬¤Ç¤¤¿¡£
 283 2.6.10 °Ê¹ß¤Î¥«¡¼¥Í¥ë¤Ç¤Ï¡¢ÈóÆÃ¸¢¥×¥í¥»¥¹¤Ç¤¢¤Ã¤Æ¤â¼¡¤Î¾ò·ï¤òËþ¤¿¤»¤Ð
 284 ¤³¤ì¤é¤ÎÁàºî¤òÍøÍÑ¤¹¤ë¤³¤È¤¬¤Ç¤¤ë¡£¤½¤Î¾ò·ï¤È¤Ï¡¢¥×¥í¥»¥¹¤Î¼Â¸ú UID
 285 ¤¬¤½¤Î¥»¥°¥á¥ó¥È¤Î½êÍ¼Ô¤â¤·¤¯¤ÏºîÀ®¼Ô¤Î UID ¤È°ìÃ×¤·¡¢
 286 .RB ( SHM_LOCK
 287 ¤Î¾ì¹ç¤Ë¤Ï) ¥í¥Ã¥¯¤¹¤ë¥á¥â¥ê¤Î¹ç·×¤¬
 288 .B RLIMIT_MEMLOCK
 289 ¥ê¥½¡¼¥¹¾å¸Â
 290 .RB ( setrlimit (2)
 291 »²¾È) ¤ÎÈÏ°ÏÆâ¤ËÆþ¤Ã¤Æ¤¤¤ë¤³¤È¤Ç¤¢¤ë¡£
 292 .\" There was some weirdness in 2.6.9: SHM_LOCK and SHM_UNLOCK could
 293 .\" be applied to a segment, regardless of ownership of the segment.
 294 .\" This was a botch-up in the move to RLIMIT_MEMLOCK, and was fixed
 295 .\" in 2.6.10.  MTK, May 2005
 296 .SH ÊÖ¤êÃÍ
 297 .B IPC_INFO
 298 ¤È
 299 .B SHM_INFO
 300 Áàºî¤Ï¡¢À®¸ù¤¹¤ë¤È¡¢Á´¤Æ¤Î¶¦Í¥á¥â¥ê¥»¥°¥á¥ó¥È¤Ë´Ø¤¹¤ë¾ðÊó¤ò
 301 ´ÉÍý¤·¤Æ¤¤¤ë¥«¡¼¥Í¥ë¤ÎÆâÉôÇÛÎó¤Î»ÈÍÑÃæ¥¨¥ó¥È¥ê¤Î¥¤¥ó¥Ç¥Ã¥¯¥¹¤Î
 302 ¤¦¤ÁºÇÂçÃÍ¤òÊÖ¤¹
 303 (¤³¤Î¾ðÊó¤Ï¡¢¥·¥¹¥Æ¥à¤ÎÁ´¤Æ¤Î¶¦Í¥á¥â¥ê¥»¥°¥á¥ó¥È¤Ë´Ø¤¹¤ë¾ðÊó¤ò
 304 ¼èÆÀ¤¹¤ë¤¿¤á¤Ë¡¢
 305 .B SHM_STAT
 306 Áàºî¤ò·«¤êÊÖ¤·¼Â¹Ô¤¹¤ëºÝ¤Ë»ÈÍÑ¤Ç¤¤ë)¡£
 307 .B SHM_STAT
 308 Áàºî¤Ï¡¢À®¸ù¤¹¤ë¤È¡¢
 309 .I shmid
 310 ¤Ç»ØÄê¤µ¤ì¤¿¥¤¥ó¥Ç¥Ã¥¯¥¹¤ò»ý¤Ä¶¦Í¥á¥â¥ê¥»¥°¥á¥ó¥È¤Î¼±ÊÌ»Ò¤òÊÖ¤¹¡£
 311 Â¾¤ÎÁàºî¤Ï¡¢À®¸ù¤Î¾ì¹ç 0 ¤òÊÖ¤¹¡£
 312
 313 ¥¨¥é¡¼¤Î¾ì¹ç¤Ï \-1 ¤òÊÖ¤·¡¢
 314 .I errno
 315 ¤òÅ¬ÀÚ¤ËÀßÄê¤¹¤ë¡£
 316 .SH ¥¨¥é¡¼
 317 .TP
 318 .B EACCES
 319
 320 \fBIPC_STAT\fP ¤Þ¤¿¤Ï \fBSHM_STAT\fP ¤¬Í×µá¤µ¤ì¡¢
 321 \fIshm_perm.mode\fP ¤¬
 322 .I shmid
 323 ¤Ø¤ÎÆÉ¤ß¹þ¤ß¥¢¥¯¥»¥¹¤òµö¤·¤Æ¤ª¤é¤º¡¢
 324 ¤«¤Ä¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤¬
 325 .B CAP_IPC_OWNER
 326 ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£ (capability) ¤ò»ý¤Ã¤Æ¤¤¤Ê¤¤¡£
 327 .TP
 328 .B EFAULT
 329 .I cmd
 330 °ú¤¿ô¤Ë
 331 .B IPC_SET
 332 ¤«
 333 .B IPC_STAT
 334 ¤¬»ØÄê¤µ¤ì¤¿¤¬
 335 .I buf
 336 ¤Ç»Ø¤µ¤ì¤Æ¤¤¤ë¥¢¥É¥ì¥¹¤Ë¥¢¥¯¥»¥¹¤Ç¤¤Ê¤¤¡£
 337 .TP
 338 .B EIDRM
 339 \fIshmid\fP ¤¬ºï½ü (remove) ¤µ¤ì¤¿¼±ÊÌ»Ò (identifier) ¤ò»Ø¤·¤Æ¤¤¤ë¡£
 340 .TP
 341 .B EINVAL
 342 \fIshmid\fP ¤¬Í¸ú¤Ê¼±ÊÌ»Ò¤Ç¤Ê¤¤¤«¡¢
 343 \fIcmd\fP ¤¬Í¸ú¤Ê¥³¥Þ¥ó¥É¤Ç¤Ê¤¤¡£
 344 ¤â¤·¤¯¤Ï¡¢
 345 .B SHM_STAT
 346 Áàºî¤Î¾ì¹ç¤Ë¡¢
 347 .I shmid
 348 ¤Ç»ØÄê¤µ¤ì¤¿¥¤¥ó¥Ç¥Ã¥¯¥¹ÃÍ¤¬¸½ºßÌ¤»ÈÍÑ¤ÎÇÛÎó¤Î¥¹¥í¥Ã¥È¤ò»²¾È¤·¤Æ¤¤¤¿¡£
 349 .TP
 350 .B ENOMEM
 351 (2.6.9 °Ê¹ß¤Î¥«¡¼¥Í¥ë¤Ë¤ª¤¤¤Æ)
 352 .B SHM_LOCK
 353 ¤¬»ØÄê¤µ¤ì¡¢
 354 ¥í¥Ã¥¯¤µ¤ì¤ëÍ½Äê¤Î¥»¥°¥á¥ó¥È¤Î¥µ¥¤¥º
 355 (¥í¥Ã¥¯¤µ¤ì¤ë¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤Î¹ç·×¥Ð¥¤¥È¿ô) ¤¬¡¢
 356 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¥æ¡¼¥¶¡¼ ID ¤Ë¤Ä¤¤¤Æ¤ÎÀ©¸Â¤òÄ¶¤¨¤¿¡£
 357 ¤³¤ÎÀ©¸Â¤Ï
 358 .B RLIMIT_MEMLOCK
 359 ¥½¥Õ¥È»ñ¸»À©¸Â¤ÇÄêµÁ¤µ¤ì¤ë
 360 .RB ( setrlimit (2)
 361 ¤ò»²¾È)¡£
 362 .TP
 363 .B EOVERFLOW
 364 \fBIPC_STAT\fP ¤¬»î¤ß¤é¤ì¡¢GID ¤ä UID ¤ÎÃÍ¤¬
 365 .I buf
 366 ¤Ç»Ø¼¨¤µ¤ì¤ë¹½Â¤ÂÎ¤Ë³ÊÇ¼¤¹¤ë¤Ë¤ÏÂç¤²á¤®¤ë¡£
 367 .TP
 368 .B EPERM
 369 \fBIPC_SET\fP ¤« \fBIPC_RMID\fP ¤¬»î¤ß¤é¤ì¡¢
 370 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤Î¼Â¸ú¥æ¡¼¥¶¡¼ ID ¤¬ºîÀ®¼Ô
 371 .RI ( shm_perm.cuid )
 372 ¤Ç¤â½êÍ¼Ô
 373 .RI ( shm_perm.uid )
 374 ¤Ç¤â¤Ê¤¯¡¢¥×¥í¥»¥¹¤¬ÆÃ¸¢¤ò»ý¤¿¤Ê¤¤ (Linux ¤Ç¤Ï
 375 .B CAP_SYS_ADMIN
 376 ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤ò»ý¤¿¤Ê¤¤)¡£
 377
 378 ¤Þ¤¿¤Ï (2.6.9 ¤è¤êÁ°¤Î¥«¡¼¥Í¥ë¤Ç)
 379 .B SHM_LOCK
 380 ¤Þ¤¿¤Ï
 381 .B SHM_UNLOCK
 382 ¤¬»ØÄê¤µ¤ì¤Æ¤¤¤ë¤¬¡¢¥×¥í¥»¥¹¤¬ÆÃ¸¢¤ò»ý¤¿¤Ê¤¤
 383 (Linux ¤Ç¤Ï
 384 .B CAP_IPC_LOCK
 385 ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤ò»ý¤¿¤Ê¤¤)¡£
 386 (Linux 2.6.9 °Ê¹ß¤Ç¤Ï¡¢
 387 .B RLIMIT_MEMLOCK
 388 ¤¬ 0 ¤Ç¸Æ¤Ó½Ð¤·¸µ¤¬ÆÃ¸¢¤ò»ý¤¿¤Ê¤¤¾ì¹ç¤Ë¤â¡¢¤³¤Î¥¨¥é¡¼¤¬µ¯¤³¤ë¡£)
 389 .SH ½àµò
 390 SVr4, POSIX.1-2001.
 391 .\" SVr4 ¤Ë¤ÏÂ¾¤Ë EINVAL, ENOENT, ENOSPC, ENOMEM,
 392 .\" EEXIST ¥¨¥é¡¼¤Ë¤Ä¤¤¤Æ¤Îµ½Ò¤¬¤¢¤ë¡£
 393 .\" SVr4 ¤ª¤è¤Ó SVID ¤Ë¤Ï EIDRM ¥¨¥é¡¼¤Ë¤Ä¤¤¤Æ¤Îµ½Ò¤Ï¤Ê¤¤¡£
 394 .SH Ãí°Õ
 395 .BR IPC_INFO ,
 396 .BR SHM_STAT ,
 397 .B SHM_INFO
 398 Áàºî¤Ï¡¢
 399 .BR ipcs (8)
 400 ¥×¥í¥°¥é¥à¤Ç³ä¤êÅö¤ÆºÑ¤Î»ñ¸»¤Ë´Ø¤¹¤ë¾ðÊó¤òÄó¶¡¤¹¤ë¤¿¤á¤Ë
 401 »ÈÍÑ¤µ¤ì¤Æ¤¤¤ë¡£¾Íè¡¢¤³¤ì¤é¤ÎÁàºî¤ÏÊÑ¹¹¤µ¤ì¤¿¤ê¡¢
 402 /proc ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Ë°ÜÆ°¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
 403
 404 Linux ¤Ç¤Ï¡¢
 405 .I shmctl(IPC_RMID)
 406 ¤ò»È¤Ã¤Æ¤¹¤Ç¤Ëºï½ü¥Þ¡¼¥¯¤¬¤Ä¤±¤é¤ì¤Æ¤¤¤ë¶¦Í¥á¥â¥ê¡¦¥»¥°¥á¥ó¥È¤ò
 407 ¤¢¤ë¥×¥í¥»¥¹¤¬ÉÕ²Ã (attach)
 408 .RB ( shmat (2))
 409 ¤¹¤ë¤³¤È¤òµö²Ä¤·¤Æ¤¤¤ë¡£
 410 ¤³¤Îµ¡Ç½¤ÏÂ¾¤Î Unix ¤Î¼ÂÁõ¤Ç¤ÏÍøÍÑ¤Ç¤¤Ê¤¤¡£
 411 °Ü¿¢À¤ò¹ÍÎ¸¤·¤¿¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤Ç¤Ï¤³¤ì¤Ë°ÍÂ¸¤·¤Ê¤¤¤è¤¦¤Ë¤¹¤Ù¤¤Ç¤¢¤ë¡£
 412
 413 \fI¹½Â¤ÂÎ shmid_ds\fP Æâ¤ÎÂ¿¤¯¤Î¥Õ¥£¡¼¥ë¥É¤Ï¡¢
 414 Linux 2.2 ¤Ç¤Ï
 415 .I short
 416 ·¿¤À¤Ã¤¿¤¬¡¢Linux 2.4 ¤Ç¤Ï
 417 .I long
 418 ·¿¤Ë¤Ê¤Ã¤¿¡£
 419 ¤³¤ÎÍøÅÀ¤òÀ¸¤«¤¹¤Ë¤Ï¡¢glibc-2.1.91 °Ê¹ß¤Î´Ä¶²¼¤Ç
 420 ºÆ¥³¥ó¥Ñ¥¤¥ë¤¹¤ì¤Ð½½Ê¬¤Ç¤¢¤ë¡£
 421 ¥«¡¼¥Í¥ë¤Ï¿·¤·¤¤·Á¼°¤Î¸Æ¤Ó½Ð¤·¤È¸Å¤¤·Á¼°¤Î¸Æ¤Ó½Ð¤·¤ò
 422 .I cmd
 423 Æâ¤Î
 424 .B IPC_64
 425 ¥Õ¥é¥°¤Ç¶èÊÌ¤¹¤ë¡£
 426 .SH ´ØÏ¢¹àÌÜ
 427 .BR mlock (2),
 428 .BR setrlimit (2),
 429 .BR shmget (2),
 430 .BR shmop (2),
 431 .BR capabilities (7),
 432 .BR shm_overview (7),
 433 .BR svipc (7)