1 #include <sys/types.h> 2 #include <sys/signal.h> 3 4 unsigned sleep(unsigned secs)5 sleep(unsigned secs) { 6 extern time_t time (time_t *); 7 time_t t = time(0); 8 9 _alarm(secs); 10 _pause(); 11 return (time(0) - t); 12 } 13