Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / ipc.h
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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 1.15 1999/12/29 04:24:43 peter Exp $
ec12abe0 45 * $DragonFly: src/sys/sys/ipc.h,v 1.4 2003/08/27 02:03:22 dillon Exp $
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46 */
47
48/*
49 * SVID compatible ipc.h file
50 */
51#ifndef _SYS_IPC_H_
52#define _SYS_IPC_H_
53
54struct ipc_perm {
55 ushort cuid; /* creator user id */
56 ushort cgid; /* creator group id */
57 ushort uid; /* user id */
58 ushort gid; /* group id */
59 ushort mode; /* r/w permission */
60 ushort seq; /* sequence # (to generate unique msg/sem/shm id) */
61 key_t key; /* user specified msg/sem/shm key */
62};
63
64/* common mode bits */
65#define IPC_R 000400 /* read permission */
66#define IPC_W 000200 /* write/alter permission */
67#define IPC_M 010000 /* permission to change control info */
68
69/* SVID required constants (same values as system 5) */
70#define IPC_CREAT 001000 /* create entry if key does not exist */
71#define IPC_EXCL 002000 /* fail if key exists */
72#define IPC_NOWAIT 004000 /* error if request must wait */
73
74#define IPC_PRIVATE (key_t)0 /* private key */
75
76#define IPC_RMID 0 /* remove identifier */
77#define IPC_SET 1 /* set options */
78#define IPC_STAT 2 /* get options */
79
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80#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
81
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82/* Macros to convert between ipc ids and array indices or sequence ids */
83#define IPCID_TO_IX(id) ((id) & 0xffff)
84#define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
85#define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))
86
87struct proc;
88
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89#endif
90
91#ifdef _KERNEL
92
b153f746 93int ipcperm (struct proc *, struct ipc_perm *, int);
ec12abe0 94
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95#else /* ! _KERNEL */
96
97/* XXX doesn't really belong here, but has been historical practice in SysV. */
98
99#include <sys/cdefs.h>
100
101__BEGIN_DECLS
b153f746 102key_t ftok (const char *, int);
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103__END_DECLS
104
105#endif /* _KERNEL */
106
107#endif /* !_SYS_IPC_H_ */