FreeBSD/Linux Kernel Cross Reference
sys/sys/ipc.h
1 /* $NetBSD: ipc.h,v 1.26 2003/08/07 16:34:05 agc Exp $ */
2
3 /*
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * This code is derived from software contributed to Berkeley by
13 * the Systems Programming Group of the University of Utah Computer
14 * Science Department.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)ipc.h 8.4 (Berkeley) 2/19/95
41 */
42
43 /*
44 * Copyright (c) 1988 University of Utah.
45 *
46 * This code is derived from software contributed to Berkeley by
47 * the Systems Programming Group of the University of Utah Computer
48 * Science Department.
49 *
50 * Redistribution and use in source and binary forms, with or without
51 * modification, are permitted provided that the following conditions
52 * are met:
53 * 1. Redistributions of source code must retain the above copyright
54 * notice, this list of conditions and the following disclaimer.
55 * 2. Redistributions in binary form must reproduce the above copyright
56 * notice, this list of conditions and the following disclaimer in the
57 * documentation and/or other materials provided with the distribution.
58 * 3. All advertising materials mentioning features or use of this software
59 * must display the following acknowledgement:
60 * This product includes software developed by the University of
61 * California, Berkeley and its contributors.
62 * 4. Neither the name of the University nor the names of its contributors
63 * may be used to endorse or promote products derived from this software
64 * without specific prior written permission.
65 *
66 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
67 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
68 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
69 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
70 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
74 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
75 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
76 * SUCH DAMAGE.
77 *
78 * @(#)ipc.h 8.4 (Berkeley) 2/19/95
79 */
80
81 /*
82 * SVID compatible ipc.h file
83 */
84
85 #ifndef _SYS_IPC_H_
86 #define _SYS_IPC_H_
87
88 #include <sys/featuretest.h>
89 #include <sys/types.h>
90
91 struct ipc_perm {
92 uid_t uid; /* user id */
93 gid_t gid; /* group id */
94 uid_t cuid; /* creator user id */
95 gid_t cgid; /* creator group id */
96 mode_t mode; /* r/w permission */
97
98 /*
99 * These members are private and used only in the internal
100 * implementation of this interface.
101 */
102 unsigned short _seq; /* sequence # (to generate unique
103 msg/sem/shm id) */
104 key_t _key; /* user specified msg/sem/shm key */
105 };
106
107 #if defined(_NETBSD_SOURCE)
108 /* Warning: 64-bit structure padding is needed here */
109 struct ipc_perm_sysctl {
110 u_int64_t _key;
111 uid_t uid;
112 gid_t gid;
113 uid_t cuid;
114 gid_t cgid;
115 mode_t mode;
116 int16_t _seq;
117 int16_t pad;
118 };
119 #endif /* _NETBSD_SOURCE */
120
121 #ifdef _KERNEL
122 /*
123 * Old IPC permission structure used before NetBSD 1.5.
124 */
125 struct ipc_perm14 {
126 unsigned short cuid; /* creator user id */
127 unsigned short cgid; /* creator group id */
128 unsigned short uid; /* user id */
129 unsigned short gid; /* group id */
130 unsigned short mode; /* r/w permission */
131 unsigned short seq; /* sequence # (to generate unique
132 msg/sem/shm id) */
133 key_t key; /* user specified msg/sem/shm key */
134 };
135 #endif /* _KERNEL */
136
137 /* Common access type bits, used with ipcperm(). */
138 #define IPC_R 000400 /* read permission */
139 #define IPC_W 000200 /* write/alter permission */
140 #define IPC_M 010000 /* permission to change control info */
141
142 /* X/Open required constants (same values as system 5) */
143 #define IPC_CREAT 001000 /* create entry if key does not exist */
144 #define IPC_EXCL 002000 /* fail if key exists */
145 #define IPC_NOWAIT 004000 /* error if request must wait */
146
147 #define IPC_PRIVATE (key_t)0 /* private key */
148
149 #define IPC_RMID 0 /* remove identifier */
150 #define IPC_SET 1 /* set options */
151 #define IPC_STAT 2 /* get options */
152
153 /*
154 * Macros to convert between ipc ids and array indices or sequence ids.
155 * The first of these is used by ipcs(1), and so is defined outside the
156 * kernel as well.
157 */
158 #if defined(_NETBSD_SOURCE)
159 #define IXSEQ_TO_IPCID(ix,perm) (((perm._seq) << 16) | (ix & 0xffff))
160 #endif
161
162 #ifdef _KERNEL
163 #define IPCID_TO_IX(id) ((id) & 0xffff)
164 #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
165
166 int ipcperm __P((struct ucred *, struct ipc_perm *, int));
167
168 void ipc_perm14_to_native __P((struct ipc_perm14 *, struct ipc_perm *));
169 void native_to_ipc_perm14 __P((struct ipc_perm *, struct ipc_perm14 *));
170 #endif /* _KERNEL */
171
172 #ifndef _KERNEL
173 #include <sys/cdefs.h>
174
175 __BEGIN_DECLS
176 key_t ftok __P((const char *, int));
177 __END_DECLS
178 #endif
179 #endif /* !_SYS_IPC_H_ */
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