1 #include <unistd.h> 2 #include <time.h> 3 sleep(unsigned seconds)4 unsigned sleep(unsigned seconds) 5 { 6 struct timespec tv = { .tv_sec = seconds, .tv_nsec = 0 }; 7 if (nanosleep(&tv, &tv)) 8 return tv.tv_sec; 9 return 0; 10 } 11