handle_signal
r = handle_signal();
void handle_signal(int);
signal(SIGSEGV, handle_signal);
signal(SIGSEGV, handle_signal);
handle_signal(eventlist[i]);
signal_set(&ev_sighup, SIGHUP, handle_signal, NULL);
signal_set(&ev_sigint, SIGINT, handle_signal, NULL);
signal_set(&ev_sigterm, SIGTERM, handle_signal, NULL);
void handle_signal(int, short, void *);
handle_signal(eventlist[i]);