Annotation of sys/sys/ipc.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ipc.h,v 1.10 2004/07/15 11:24:46 millert 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: struct ipc_perm {
52: uid_t cuid; /* creator user id */
53: gid_t cgid; /* creator group id */
54: uid_t uid; /* user id */
55: gid_t gid; /* group id */
56: mode_t mode; /* r/w permission */
57: unsigned short seq; /* sequence # (to generate unique msg/sem/shm id) */
58: key_t key; /* user specified msg/sem/shm key */
59: };
60:
61: #ifdef _KERNEL
62: struct ipc_perm23 {
63: unsigned short cuid; /* creator user id */
64: unsigned short cgid; /* creator group id */
65: unsigned short uid; /* user id */
66: unsigned short gid; /* group id */
67: unsigned short mode; /* r/w permission */
68: unsigned short seq; /* sequence # (to generate unique msg/sem/shm id) */
69: key_t key; /* user specified msg/sem/shm key */
70: };
71:
72: struct ipc_perm35 {
73: uid_t cuid; /* creator user id */
74: gid_t cgid; /* creator group id */
75: uid_t uid; /* user id */
76: gid_t gid; /* group id */
77: u_int16_t mode; /* r/w permission */
78: unsigned short seq; /* sequence # (to generate unique msg/sem/shm id) */
79: key_t key; /* user specified msg/sem/shm key */
80: };
81: #endif
82:
83: /* common mode bits */
84: #define IPC_R 000400 /* read permission */
85: #define IPC_W 000200 /* write/alter permission */
86: #define IPC_M 010000 /* permission to change control info */
87:
88: /* SVID required constants (same values as system 5) */
89: #define IPC_CREAT 001000 /* create entry if key does not exist */
90: #define IPC_EXCL 002000 /* fail if key exists */
91: #define IPC_NOWAIT 004000 /* error if request must wait */
92:
93: #define IPC_PRIVATE (key_t)0 /* private key */
94:
95: #define IPC_RMID 0 /* remove identifier */
96: #define IPC_SET 1 /* set options */
97: #define IPC_STAT 2 /* get options */
98:
99: #ifdef _KERNEL
100: /* Macros to convert between ipc ids and array indices or sequence ids */
101: #define IPCID_TO_IX(id) ((id) & 0xffff)
102: #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
103: #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))
104:
105: int ipcperm(struct ucred *, struct ipc_perm *, int);
106:
107: #else /* !_KERNEL */
108:
109: #include <sys/cdefs.h>
110:
111: __BEGIN_DECLS
112: key_t ftok(const char *, int);
113: __END_DECLS
114: #endif
115: #endif /* !_SYS_IPC_H_ */
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