uclibc-ng/libc/sysdeps/linux/common/bits/ipc.h

/* Copyright (C) 1995-1999, 2000 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#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.  */
#ifdef __USE_GNU
# define IPC_INFO	3		/* See ipcs.  */
#endif

/* Type of a SYSV IPC key.  */
typedef int __kernel_key_t;

/* Special key values.  */
#define IPC_PRIVATE	((__key_t) 0)	/* Private key.  */


/* Data structure used to pass permission information to IPC operations.  */
struct ipc_perm
{
    __kernel_key_t	__key;
    __kernel_uid_t	uid;
    __kernel_gid_t	gid;
    __kernel_uid_t	cuid;
    __kernel_gid_t	cgid;
    __kernel_mode_t	mode; 
    unsigned short	__seq;
};