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1 | /* Copyright (C) 2000 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
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16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #ifndef _SYS_IPC_H | |
20 | # error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead." | |
21 | #endif | |
22 | ||
23 | #include <sys/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 | #define IPC_INFO 3 /* See ipcs. */ | |
35 | ||
36 | /* Special key values. */ | |
37 | #define IPC_PRIVATE ((__key_t) 0) /* Private key. */ | |
38 | ||
39 | ||
40 | /* Data structure used to pass permission information to IPC operations. */ | |
41 | struct ipc_perm | |
42 | { | |
43 | __key_t __key; /* Key. */ | |
44 | __uid_t uid; /* Owner's user ID. */ | |
45 | __gid_t gid; /* Owner's group ID. */ | |
46 | __uid_t cuid; /* Creator's user ID. */ | |
47 | __gid_t cgid; /* Creator's group ID. */ | |
48 | __mode_t mode; /* Read/write permission. */ | |
49 | unsigned short int __seq; /* Sequence number. */ | |
50 | unsigned short int __pad1; | |
51 | unsigned long int __unused1; | |
52 | unsigned long int __unused2; | |
53 | }; |