13 #define MQNAME "/mytstqueue2"
17 void alarmhandler(int sig)
19 write(1, "timeout\n", 8);
32 attr.mq_msgsize = 128;
33 mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
36 status = mq_getattr(mq, &attr);
40 if (pid == 0) { /* child */
46 signal(SIGALRM, alarmhandler);
48 mq = mq_open(MQNAME, O_RDWR);
50 err(1, "child: mq_open");
51 buf = malloc(attr.mq_msgsize);
52 for (j = 0; j < LOOPS; ++j) {
54 status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
56 err(2, "child: mq_receive");
57 for (i = 0; i < attr.mq_msgsize; ++i)
59 err(3, "child: message data corrupted");
61 err(4, "child: priority is incorrect: %d",
68 } else if (pid == -1) {
74 signal(SIGALRM, alarmhandler);
75 buf = malloc(attr.mq_msgsize);
76 for (j = 0; j < LOOPS; ++j) {
77 for (i = 0; i < attr.mq_msgsize; ++i)
80 status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
88 status = mq_close(mq);