sigqtest1.c revision 152155 
1/* $FreeBSD: head/tools/regression/sigqueue/sigqtest1/sigqtest1.c 152155 2005-11-07 14:10:33Z davidxu $ */
2#include <signal.h>
3#include <stdio.h>
4#include <err.h>
5#include <errno.h>
6
7int received;
8
9void handler(int sig, siginfo_t *si, void *ctx)
10{
11	if (si->si_code != SI_QUEUE)
12		errx(1, "si_code != SI_QUEUE");
13	if (si->si_value.sival_int != received)
14		errx(1, "signal is out of order");
15	received++;
16}
17
18int main()
19{
20	struct sigaction sa;
21	union sigval val;
22	int ret;
23	int i;
24	sigset_t set;
25
26	sa.sa_flags = SA_SIGINFO;
27	sigemptyset(&sa.sa_mask);
28	sa.sa_sigaction = handler;
29	sigaction(SIGRTMIN, &sa, NULL);
30	sigemptyset(&set);
31	sigaddset(&set, SIGRTMIN);
32	sigprocmask(SIG_BLOCK, &set, NULL);
33	i = 0;
34	for (;;) {
35		val.sival_int = i;
36		ret = sigqueue(getpid(), SIGRTMIN, val);
37		if (ret == -1) {
38			if (errno != EAGAIN) {
39				errx(1, "errno != EAGAIN");
40			}
41			break;
42		}
43		i++;
44	}
45	sigprocmask(SIG_UNBLOCK, &set, NULL);
46	if (received != i)
47		errx(1, "error, signal lost");
48	printf("OK\n");
49}
50