/*	$OpenBSD: fifo.c,v 1.2 2002/03/13 15:00:37 fgsch Exp $	*/

#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>

#define	FIFO_PATH	"file-fifo"

void	handler(int);

void
handler(int s)
{
	write(2, ".", 1);
}

int
main(int argc, char **argv)
{
	struct itimerval it;
	struct sigaction act;

	unlink(FIFO_PATH);

	if (mkfifo(FIFO_PATH, 0600) < 0)
		err(1, "mkfifo");

	act.sa_handler = handler;
	act.sa_flags = SA_RESTART;
	if (sigaction(SIGALRM, &act, NULL) < 0)
		err(1, "sigaction");

	it.it_interval.tv_sec = 2;
	it.it_interval.tv_usec = 0;
	it.it_value = it.it_interval;
	if (setitimer(ITIMER_REAL, &it, NULL) < 0)
		err(1, "setitimer");

	if (open(FIFO_PATH, O_RDONLY) < 0) {
		if (errno == EINTR)
			errx(1, "open not restarted");
		else
			err(1, "open");
	}

	exit(0);
}