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

int main()
{
	struct timeval tv, tv2, tv3;
	
	tv3.tv_sec = 20;
	tv3.tv_usec = 0;
	
	gettimeofday(&tv, NULL);
	select(0, NULL, NULL, NULL, &tv3);
	gettimeofday(&tv2, NULL);
	printf("%ld.%06ld -> %ld.%06ld\n", tv.tv_sec, tv.tv_usec, tv2.tv_sec, tv2.tv_usec);
	return 0;
}