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dff8da6b | 1 | /* Copyright (C) 1995-2024 Free Software Foundation, Inc. |
8a4b65b4 | 2 | This file is part of the GNU C Library. |
60478656 | 3 | |
8a4b65b4 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
60478656 | 8 | |
8a4b65b4 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
60478656 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
60478656 | 17 | |
f4017d20 UD |
18 | #ifndef _SYS_IPC_H |
19 | # error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead." | |
20 | #endif | |
8a4b65b4 | 21 | |
219aa9e9 | 22 | #include <bits/types.h> |
60478656 RM |
23 | |
24 | /* Mode bits for `msgget', `semget', and `shmget'. */ | |
25 | #define IPC_CREAT 01000 /* create key if key does not exist */ | |
26 | #define IPC_EXCL 02000 /* fail if key exists */ | |
27 | #define IPC_NOWAIT 04000 /* return error on wait */ | |
28 | ||
29 | /* Control commands for `msgctl', `semctl', and `shmctl'. */ | |
30 | #define IPC_RMID 0 /* remove identifier */ | |
31 | #define IPC_SET 1 /* set `ipc_perm' options */ | |
32 | #define IPC_STAT 2 /* get `ipc_perm' options */ | |
33 | ||
60478656 RM |
34 | /* Special key values. */ |
35 | #define IPC_PRIVATE ((key_t) 0) /* private key */ | |
36 | ||
37 | ||
38 | /* Data structure used to pass permission information to IPC operations. */ | |
39 | struct ipc_perm | |
f4017d20 UD |
40 | { |
41 | __uid_t uid; /* owner's user ID */ | |
42 | __gid_t gid; /* owner's group ID */ | |
43 | __uid_t cuid; /* creator's user ID */ | |
44 | __gid_t cgid; /* creator's group ID */ | |
45 | __mode_t mode; /* read/write permission */ | |
46 | }; |