itimer.it_interval.tv_usec = TIME_UPDATE_INTERVAL * 1000;
itimer.it_value = itimer.it_interval;
if (setitimer(ITIMER_REAL, &itimer, NULL)) {
itimer.it_interval.tv_usec = TIME_UPDATE_INTERVAL * 1000;
itimer.it_value = itimer.it_interval;
if (setitimer(ITIMER_REAL, &itimer, NULL)) {