unsigned int alarm(unsigned int seconds) { struct itimerval old, new; new.it_interval.tv_usec = 0; new.it_interval.tv_sec = 0; new.it_value.tv_usec = 0; new.it_value.tv_sec = (long int) seconds; if (setitimer(ITIMER_REAL, &new, &old) < 0) { return 0; } else { return old.it_value.tv_sec; } }