| /* Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_IPC_H |
| # error "Never use <bits/ipc.h> directly; include <sys/ipc.h> instead." |
| #endif |
| |
| #include <bits/types.h> |
| |
| /* Mode bits for `msgget', `semget', and `shmget'. */ |
| #define IPC_CREAT 01000 /* create key if key does not exist */ |
| #define IPC_EXCL 02000 /* fail if key exists */ |
| #define IPC_NOWAIT 04000 /* return error on wait */ |
| |
| /* Control commands for `msgctl', `semctl', and `shmctl'. */ |
| #define IPC_RMID 0 /* remove identifier */ |
| #define IPC_SET 1 /* set `ipc_perm' options */ |
| #define IPC_STAT 2 /* get `ipc_perm' options */ |
| |
| /* Special key values. */ |
| #define IPC_PRIVATE ((key_t) 0) /* private key */ |
| |
| |
| /* Data structure used to pass permission information to IPC operations. */ |
| struct ipc_perm |
| { |
| __uid_t uid; /* owner's user ID */ |
| __gid_t gid; /* owner's group ID */ |
| __uid_t cuid; /* creator's user ID */ |
| __gid_t cgid; /* creator's group ID */ |
| __mode_t mode; /* read/write permission */ |
| }; |