clock_nanosleep (2), nanosleep (2), timer_settime (2), timerfd_settime (2), and /proc/uptime . Currentlytimer_delete () timer_gettime () timer_getoverrun () timer_settime () TRC - _POSIX_TRACE - _SC_TRACE POSIX tracingtimer_getoverrun (2) timer_gettime (2) timer_settime (2) times (2) umask (2) uname