1 /* Copyright (C) 1995-1997, 1999, 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 # error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead."
23 #include <bits/types.h>
25 /* Mode bits for `msgget', `semget', and `shmget'. */
26 #define IPC_CREAT 01000 /* create key if key does not exist */
27 #define IPC_EXCL 02000 /* fail if key exists */
28 #define IPC_NOWAIT 04000 /* return error on wait */
30 /* Control commands for `msgctl', `semctl', and `shmctl'. */
31 #define IPC_RMID 0 /* remove identifier */
32 #define IPC_SET 1 /* set `ipc_perm' options */
33 #define IPC_STAT 2 /* get `ipc_perm' options */
35 /* Special key values. */
36 #define IPC_PRIVATE ((__key_t) 0) /* private key */
39 /* Common mode bits. */
40 # define IPC_R 0400 /* read permission, same as S_IRUSR */
41 # define IPC_W 0200 /* write permission, same as S_IWUSR */
42 # define IPC_M 0x1000 /* control permission */
46 /* Data structure used to pass permission information to IPC operations. */
49 __uid_t cuid
; /* creator user id */
50 __gid_t cgid
; /* creator group id */
51 __uid_t uid
; /* user id */
52 __gid_t gid
; /* group id */
53 __mode_t mode
; /* r/w permission */
54 __uint16_t __seq
; /* sequence # (to generate unique ipcid) */
55 __key_t __key
; /* user specified msg/sem/shm key */