1/*	$OpenBSD: ipc.h,v 1.13 2014/11/15 21:42:50 guenther Exp $	*/
2/*	$NetBSD: ipc.h,v 1.15 1996/02/09 18:25:12 christos Exp $	*/
3
4/*
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1990, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 * (c) UNIX System Laboratories, Inc.
9 * All or some portions of this file are derived from material licensed
10 * to the University of California by American Telephone and Telegraph
11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
12 * the permission of UNIX System Laboratories, Inc.
13 *
14 * This code is derived from software contributed to Berkeley by
15 * the Systems Programming Group of the University of Utah Computer
16 * Science Department.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 *    notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in the
25 *    documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 *    may be used to endorse or promote products derived from this software
28 *    without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 *
42 *	@(#)ipc.h	8.3 (Berkeley) 1/21/94
43 */
44
45/*
46 * SVID compatible ipc.h file
47 */
48#ifndef _SYS_IPC_H_
49#define _SYS_IPC_H_
50
51#include <sys/types.h>
52
53struct ipc_perm {
54	uid_t		cuid;	/* creator user id */
55	gid_t		cgid;	/* creator group id */
56	uid_t		uid;	/* user id */
57	gid_t		gid;	/* group id */
58	mode_t		mode;	/* r/w permission */
59	unsigned short	seq;	/* sequence # (to generate unique msg/sem/shm id) */
60	key_t		key;	/* user specified msg/sem/shm key */
61};
62
63/* common mode bits */
64#define	IPC_R		000400	/* read permission */
65#define	IPC_W		000200	/* write/alter permission */
66#define	IPC_M		010000	/* permission to change control info */
67
68/* SVID required constants (same values as system 5) */
69#define	IPC_CREAT	001000	/* create entry if key does not exist */
70#define	IPC_EXCL	002000	/* fail if key exists */
71#define	IPC_NOWAIT	004000	/* error if request must wait */
72
73#define	IPC_PRIVATE	(key_t)0 /* private key */
74
75#define	IPC_RMID	0	/* remove identifier */
76#define	IPC_SET		1	/* set options */
77#define	IPC_STAT	2	/* get options */
78
79#ifdef _KERNEL
80/* Macros to convert between ipc ids and array indices or sequence ids */
81#define	IPCID_TO_IX(id)		((id) & 0xffff)
82#define	IPCID_TO_SEQ(id)	(((id) >> 16) & 0xffff)
83#define	IXSEQ_TO_IPCID(ix,perm)	(((perm.seq) << 16) | (ix & 0xffff))
84
85struct ucred;
86
87int ipcperm(struct ucred *, struct ipc_perm *, int);
88
89#else /* !_KERNEL */
90
91__BEGIN_DECLS
92key_t	ftok(const char *, int);
93__END_DECLS
94#endif
95#endif /* !_SYS_IPC_H_ */
96