1#define _GNU_SOURCE
 2#include <unistd.h>
 3#include <time.h>
 4
 5int usleep(unsigned useconds)
 6{
 7	struct timespec tv = {
 8		.tv_sec = useconds/1000000,
 9		.tv_nsec = (useconds%1000000)*1000
10	};
11	return nanosleep(&tv, &tv);
12}