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01: /* Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
02:    This file is part of the GNU C Library.
03: 
04:    The GNU C Library is free software; you can redistribute it and/or
05:    modify it under the terms of the GNU Lesser General Public
06:    License as published by the Free Software Foundation; either
07:    version 2.1 of the License, or (at your option) any later version.
08: 
09:    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.
13: 
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
17:    02111-1307 USA.  */
18: 
19: #ifndef _SYS_IPC_H
20: # error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead."
21: #endif
22: 
23: #include <bits/types.h>
24: 
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.  */
29: 
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.  */
34: #ifdef __USE_GNU
35: # define IPC_INFO       3               /* See ipcs.  */
36: #endif
37: 
38: /* Special key values.  */
39: #define IPC_PRIVATE     ((__key_t) 0)   /* Private key.  */
40: 
41: 
42: /* Data structure used to pass permission information to IPC operations.  */
43: struct ipc_perm
44:   {
45:     __key_t __key;                      /* Key.  */
46:     __uid_t uid;                        /* Owner's user ID.  */
47:     __gid_t gid;                        /* Owner's group ID.  */
48:     __uid_t cuid;                       /* Creator's user ID.  */
49:     __gid_t cgid;                       /* Creator's group ID.  */
50:     unsigned short int mode;            /* Read/write permission.  */
51:     unsigned short int __pad1;
52:     unsigned short int __seq;           /* Sequence number.  */
53:     unsigned short int __pad2;
54:     unsigned long int __unused1;
55:     unsigned long int __unused2;
56:   };
57: 

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