gistfile1.c

void signalHandler(int signum, siginfo_t *info, void *ptr)
{
        int status, i;
        for (i = 0; i < processes; i++) {
                kill(pidfor_signal[i], SIGKILL);
                wait(&status);
        }
        exit(EXIT_FAILURE);
}


int main(int argc, char *argv[]) {
        /* Setting up signal handling */
        //fprintf(stderr, "setting up signal\n");
        memset(&act, 0, sizeof(act));
        act.sa_sigaction = signalHandler;
        act.sa_flags = SA_SIGINFO;
        sigaction(SIGINT, &act, NULL );
        sigaction(SIGQUIT, &act, NULL );
        sigaction(SIGHUP, &act, NULL );