#include "unpipc.h"
#define MAXMSG (8192 + sizeof(long))
int
main(int argc, char **argv)
{
int mqid;
ssize_t n;
struct msgbuf *buff;
if (argc != 2)
err_quit("usage: msgrcvid <mqid>");
mqid = atoi(argv[1]);
buff = Malloc(MAXMSG);
n = Msgrcv(mqid, buff, MAXMSG, 0, 0);
printf("read %d bytes, type = %ld\n", n, buff->mtype);
exit(0);
}