#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


static void Watchdog(int signum)
{
  printf("alarm\n");
  exit(1);
}

int main(int argc, char *argv[])
{
    if (signal(SIGALRM, Watchdog)   == SIG_IGN) signal(SIGALRM, SIG_IGN);
        
    alarm(10);
    while (true) sleep(1);
}