#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>

int main(int ac, char ** av)
{
	struct timeval tv1, tv2;
	struct timespec ts, tr;
	unsigned int v = 8;
	
	if (av[1])
		v = atoi(av[1]);
	
	printf("Sleeping %d ms\n", v);

	while (1) {	
		tv2.tv_sec = 0;
		tv2.tv_usec = v * 1000;
		gettimeofday(&tv1, NULL);
		select(0, NULL, NULL, NULL, &tv2);
		gettimeofday(&tv2, NULL);
		printf("s %ld.%06ld - %ld.%06ld\n", tv1.tv_sec, tv1.tv_usec, tv2.tv_sec, tv2.tv_usec);
		sleep(1);
		ts.tv_sec = 0;
		ts.tv_nsec = v * 1000000;
		gettimeofday(&tv1, NULL);
		nanosleep(&ts, &tr);
		gettimeofday(&tv2, NULL);
		printf("n %ld.%06ld - %ld.%06ld\n", tv1.tv_sec, tv1.tv_usec, tv2.tv_sec, tv2.tv_usec);
		sleep(1);
	}
	return 0;
}