/* restartable syscall test */
#include <pthread.h>
#include <stdio.h>
#include <errno.h>

void *thr_routine(void *arg)
{
	char c;
	int err;

	printf("press a key:\n");
	err = read(0, &c, 1);
	if (err == -1)
		printf("errno = %d \n", errno);
}

void handler(int sig, siginfo_t *si, void *ucp)
{
	printf("received signal: %d\n", sig);
}

int main()
{
	struct sigaction sa;
	pthread_t td;

	sa.sa_flags = SA_RESTART;
	sigemptyset(&sa.sa_mask);
	sa.sa_sigaction = handler;

	sigaction(SIGUSR1, &sa, NULL);

	pthread_create(&td, NULL, thr_routine, NULL);
	sleep(2);
	pthread_kill(td, SIGUSR1);
	pthread_join(td, NULL);
	return 0;
}