{ keep_going = 0; signal (sig, catch_alarm); }

void do_stuff (void) { puts ("Doing stuff while waiting for alarm...."); }

int main (void) { /* Establish a handler for SIGALRM signals. */ signal (SIGALRM, catch_alarm);

/* Set an alarm to go off in a little while. */ alarm (2);

/* Check the flag once in a while to see when to quit. */ while (keep_going) do_stuff ();

return EXIT_SUCCESS; }

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