...(2), timer_gettime (2), timer_settime (2), ualarm (3) is unspecified. SEE ALSO alarm (2), getitimer (2), nanosleep (2), select (2), setitimer (2), sleep (3), ualarm (3), usecond…...timer (2) or POSIX interval timers ( timer_create (2), etc.) instead. SEE ALSO alarm (2), getitimer (2), nanosleep (2), select (2), setitimer (2), usleep (3), time (7)