1 /* $OpenBSD: msgbuf.h,v 1.8 2005/04/14 21:58:50 krw Exp $ */
2 /* $NetBSD: msgbuf.h,v 1.8 1995/03/26 20:24:27 jtc Exp $ */
3
4 /*
5 * Copyright (c) 1981, 1984, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)msgbuf.h 8.1 (Berkeley) 6/2/93
33 */
34
35 struct msgbuf {
36 #define MSG_MAGIC 0x063061
37 long msg_magic;
38 long msg_bufx; /* write pointer */
39 long msg_bufr; /* read pointer */
40 long msg_bufs; /* real msg_bufc size (bytes) */
41 long msg_bufl; /* # chars, <= msg_bufs */
42 char msg_bufc[1]; /* buffer */
43 };
44 #ifdef _KERNEL
45 extern struct msgbuf *msgbufp;
46
47 void initmsgbuf(caddr_t buf, size_t bufsize);
48 void msgbuf_putchar(const char c);
49 #endif