1 /* 2 * Copyright (c) 1981, 1984 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)msgbuf.h 7.2 (Berkeley) 12/29/88 18 */ 19 20 #define MSG_MAGIC 0x063061 21 #define MSG_BSIZE (4096 - 3 * sizeof(long)) 22 struct msgbuf { 23 long msg_magic; 24 long msg_bufx; 25 long msg_bufr; 26 char msg_bufc[MSG_BSIZE]; 27 }; 28 #ifdef KERNEL 29 struct msgbuf msgbuf; 30 #endif 31