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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SYS_IPC_BUF_H
#define _SYS_IPC_BUF_H 1
#include <features.h>
#include <sys/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. */
#define IPC_INFO 3 /* See ipcs. */
__BEGIN_DECLS
/* Special key values. */
#define IPC_PRIVATE ((__key_t) 0) /* Private key. */
/* Data structure used to pass permission information to IPC operations. */
struct ipc_perm
{
__key_t __key; /* Key. */
unsigned short int uid; /* Owner's user ID. */
unsigned short int gid; /* Owner's group ID. */
unsigned short int cuid; /* Creator's user ID. */
unsigned short int cgid; /* Creator's group ID. */
unsigned short int mode; /* Read/write permission. */
unsigned short int __seq; /* Sequence number. */
};
/* Kludge to work around Linux' restriction of only up to five
arguments to a system call. */
struct ipc_kludge
{
void *msgp;
long int msgtyp;
};
/* The actual system call: all functions are multiplexed by this. */
extern int __ipc __P ((int __call, int __first, int __second, int __third,
void *__ptr));
/* The codes for the functions to use the multiplexer `__ipc'. */
#define IPCOP_semop 1
#define IPCOP_semget 2
#define IPCOP_semctl 3
#define IPCOP_msgsnd 11
#define IPCOP_msgrcv 12
#define IPCOP_msgget 13
#define IPCOP_msgctl 14
#define IPCOP_shmat 21
#define IPCOP_shmdt 22
#define IPCOP_shmget 23
#define IPCOP_shmctl 24
__END_DECLS
#endif /* bits/ipc_buf.h */
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