FreeBSD/Linux Kernel Cross Reference
sys/sys/ipc.h
1 /*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1990, 1993
4 * The Regents of the University of California. All rights reserved.
5 * (c) UNIX System Laboratories, Inc.
6 * All or some portions of this file are derived from material licensed
7 * to the University of California by American Telephone and Telegraph
8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
9 * the permission of UNIX System Laboratories, Inc.
10 *
11 * This code is derived from software contributed to Berkeley by
12 * the Systems Programming Group of the University of Utah Computer
13 * Science Department.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 * must display the following acknowledgement:
25 * This product includes software developed by the University of
26 * California, Berkeley and its contributors.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 * @(#)ipc.h 8.4 (Berkeley) 2/19/95
44 * $FreeBSD: src/sys/sys/ipc.h,v 1.8.2.1 1999/09/05 08:22:29 peter Exp $
45 */
46
47 /*
48 * SVID compatible ipc.h file
49 */
50 #ifndef _SYS_IPC_H_
51 #define _SYS_IPC_H_
52
53 struct ipc_perm {
54 ushort cuid; /* creator user id */
55 ushort cgid; /* creator group id */
56 ushort uid; /* user id */
57 ushort gid; /* group id */
58 ushort mode; /* r/w permission */
59 ushort 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
85 int ipcperm __P((struct ucred *,struct ipc_perm *,int));
86 #else /* ! KERNEL */
87
88 /* XXX doesn't really belong here, but has been historical practice in SysV. */
89
90 #ifndef _POSIX_SOURCE
91 #include <sys/cdefs.h>
92
93 __BEGIN_DECLS
94 key_t ftok __P((const char *, int));
95 __END_DECLS
96 #endif /* ! POSIX */
97
98 #endif /* KERNEL */
99
100 #endif /* !_SYS_IPC_H_ */
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