86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _SYS_IPC_BUF_H
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#define _SYS_IPC_BUF_H 1
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#include <features.h>
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#include <sys/types.h>
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/* Mode bits for `msgget', `semget', and `shmget'. */
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#define IPC_CREAT 01000 /* Create key if key does not exist. */
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#define IPC_EXCL 02000 /* Fail if key exists. */
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#define IPC_NOWAIT 04000 /* Return error on wait. */
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/* Control commands for `msgctl', `semctl', and `shmctl'. */
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#define IPC_RMID 0 /* Remove identifier. */
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#define IPC_SET 1 /* Set `ipc_perm' options. */
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#define IPC_STAT 2 /* Get `ipc_perm' options. */
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#define IPC_INFO 3 /* See ipcs. */
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__BEGIN_DECLS
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/* Special key values. */
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#define IPC_PRIVATE ((__key_t) 0) /* Private key. */
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/* Data structure used to pass permission information to IPC operations. */
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struct ipc_perm
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{
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__key_t __key; /* Key. */
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unsigned short int uid; /* Owner's user ID. */
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unsigned short int gid; /* Owner's group ID. */
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unsigned short int cuid; /* Creator's user ID. */
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unsigned short int cgid; /* Creator's group ID. */
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unsigned short int mode; /* Read/write permission. */
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unsigned short int __seq; /* Sequence number. */
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};
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/* Kludge to work around Linux' restriction of only up to five
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arguments to a system call. */
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struct ipc_kludge
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{
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void *msgp;
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long int msgtyp;
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};
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/* The actual system call: all functions are multiplexed by this. */
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extern int __ipc __P ((int __call, int __first, int __second, int __third,
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void *__ptr));
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/* The codes for the functions to use the multiplexer `__ipc'. */
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#define IPCOP_semop 1
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#define IPCOP_semget 2
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#define IPCOP_semctl 3
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#define IPCOP_msgsnd 11
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#define IPCOP_msgrcv 12
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#define IPCOP_msgget 13
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#define IPCOP_msgctl 14
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#define IPCOP_shmat 21
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#define IPCOP_shmdt 22
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#define IPCOP_shmget 23
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#define IPCOP_shmctl 24
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__END_DECLS
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#endif /* bits/ipc_buf.h */
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