1 /* $NetBSD: msgbuf.h,v 1.10 1997/09/19 13:57:30 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1984, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)msgbuf.h 8.1 (Berkeley) 6/2/93 36 */ 37 38 #ifndef _SYS_MSGBUF_H_ 39 #define _SYS_MSGBUF_H_ 40 41 struct kern_msgbuf { 42 #define MSG_MAGIC 0x063061 43 long msg_magic; 44 long msg_bufx; /* write pointer */ 45 long msg_bufr; /* read pointer */ 46 long msg_bufs; /* real msg_bufc size (bytes) */ 47 char msg_bufc[1]; /* buffer */ 48 }; 49 50 #ifdef _KERNEL 51 extern int msgbufmapped; /* is the message buffer mapped */ 52 extern int msgbufenabled; /* is logging to the buffer enabled */ 53 extern struct kern_msgbuf *msgbufp; /* the mapped buffer, itself. */ 54 55 void initmsgbuf __P((caddr_t buf, size_t bufsize)); 56 #endif 57 58 #endif /* !_SYS_MSGBUF_H_ */ 59