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

int
main(int argc, char **argv)
{
	if (open("foo", O_RDWR) < 0) {
		perror("can't open file");
		exit(EXIT_FAILURE);
	}

	if (unlink("foo") < 0) {
		perror("error unlinking");
		exit(EXIT_FAILURE);
	}

	printf("Ok, file unlinked.  Now I go to sleep...\n");
	sleep(30);
	printf("...and done.  Disk space is freed now.\n");
	exit(EXIT_SUCCESS);
}