FreeBSD/Linux Kernel Cross Reference
sys/sys/ipc.h
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
53 struct 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
85 struct ucred;
86
87 int ipcperm(struct ucred *, struct ipc_perm *, int);
88
89 #else /* !_KERNEL */
90
91 __BEGIN_DECLS
92 key_t ftok(const char *, int);
93 __END_DECLS
94 #endif
95 #endif /* !_SYS_IPC_H_ */
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