1 /* msgbuf.h 4.2 81/02/19 */ 2 3 #define MSG_MAGIC 0x063060 4 #define MSG_BSIZE (NBPG*CLSIZE - 2 * sizeof (long)) 5 struct msgbuf { 6 long msg_magic; 7 long msg_bufx; 8 char msg_bufc[MSG_BSIZE]; 9 }; 10 #ifdef KERNEL 11 struct msgbuf msgbuf; 12 #endif 13