#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>

int main(int argc, char *argv[]) {

	pid_t pid;

	pid = fork();
	if (pid == 0) {
		sleep(4);
		_exit(0);
	}

	signal(SIGCHLD, SIG_IGN);

	system("sleep 1");

	return 0;
}