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

int main()
{
	int p[2];
	pipe(p);
	if (fork()) {
		close(p[0]);
		sleep(1);
		write(p[1], p, 1);
		wait(0);
	} else {
		close(p[1]);
		read(p[0], p + 1, 1);
		puts("received signal from pipe");
	}
	return 0;
}