src/unistd/alarm.c

   1 #include <unistd.h>
   2 #include <sys/time.h>
   3 #include "syscall.h"
   4
   5 unsigned alarm(unsigned seconds)
   6 {
   7         struct itimerval it = { .it_value.tv_sec = seconds }, old = { 0 };
   8         setitimer(ITIMER_REAL, &it, &old);
   9         return old.it_value.tv_sec + !!old.it_value.tv_usec;
  10 }