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 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)ipc.h 8.4 (Berkeley) 2/19/95
40 * $FreeBSD: releng/6.3/sys/sys/ipc.h 173886 2007-11-24 19:45:58Z cvs2svn $
41 */
42
43 /*
44 * SVID compatible ipc.h file
45 */
46 #ifndef _SYS_IPC_H_
47 #define _SYS_IPC_H_
48
49 #include <sys/cdefs.h>
50 #include <sys/_types.h>
51
52 #ifndef _GID_T_DECLARED
53 typedef __gid_t gid_t;
54 #define _GID_T_DECLARED
55 #endif
56
57 #ifndef _KEY_T_DECLARED
58 typedef __key_t key_t;
59 #define _KEY_T_DECLARED
60 #endif
61
62 #ifndef _MODE_T_DECLARED
63 typedef __mode_t mode_t;
64 #define _MODE_T_DECLARED
65 #endif
66
67 #ifndef _UID_T_DECLARED
68 typedef __uid_t uid_t;
69 #define _UID_T_DECLARED
70 #endif
71
72 /*
73 * XXX almost all members have wrong types.
74 */
75 struct ipc_perm {
76 unsigned short cuid; /* creator user id */
77 unsigned short cgid; /* creator group id */
78 unsigned short uid; /* user id */
79 unsigned short gid; /* group id */
80 unsigned short mode; /* r/w permission */
81 unsigned short seq; /* sequence # (to generate unique ipcid) */
82 key_t key; /* user specified msg/sem/shm key */
83 };
84
85 #if __BSD_VISIBLE
86 /* common mode bits */
87 #define IPC_R 000400 /* read permission */
88 #define IPC_W 000200 /* write/alter permission */
89 #define IPC_M 010000 /* permission to change control info */
90 #endif
91
92 /* SVID required constants (same values as system 5) */
93 #define IPC_CREAT 001000 /* create entry if key does not exist */
94 #define IPC_EXCL 002000 /* fail if key exists */
95 #define IPC_NOWAIT 004000 /* error if request must wait */
96
97 #define IPC_PRIVATE (key_t)0 /* private key */
98
99 #define IPC_RMID 0 /* remove identifier */
100 #define IPC_SET 1 /* set options */
101 #define IPC_STAT 2 /* get options */
102 #if __BSD_VISIBLE
103 #define IPC_INFO 3 /* get info */
104 #endif
105
106 #ifdef _KERNEL
107 /* Macros to convert between ipc ids and array indices or sequence ids */
108 #define IPCID_TO_IX(id) ((id) & 0xffff)
109 #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
110 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))
111
112 struct thread;
113 struct proc;
114 struct vmspace;
115
116 int ipcperm(struct thread *, struct ipc_perm *, int);
117 extern void (*shmfork_hook)(struct proc *, struct proc *);
118 extern void (*shmexit_hook)(struct vmspace *);
119
120 #else /* ! _KERNEL */
121
122 __BEGIN_DECLS
123 key_t ftok(const char *, int);
124 __END_DECLS
125
126 #endif /* _KERNEL */
127
128 #endif /* !_SYS_IPC_H_ */
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