#include "pidfile.c"
#include <stdio.h>
#include <unistd.h>

#define PIDFILE "/tmp/a.pid"

int main()
{
	int	n;

	n=pidfile_islocked(PIDFILE);
	if (n)
	{
		printf("running with pid %d\n",n);
		exit(1);
	}

	if (fork())
	{
		exit(0);
	}

	pidfile_dolock(PIDFILE);

	sleep(10);

	pidfile_dounlock();
}