errx(1, "%s: EV_SIGNAL incompatible use", __func__);
event_errx(1, "%s: EV_SIGNAL incompatible use", __func__);
evsignal_add(sigset_t *evsigmask, struct event *ev){	int evsignal;		if (ev->ev_events & (EV_READ|EV_WRITE))		errx(1, "%s: EV_SIGNAL incompatible use", __func__);	evsignal = EVENT_SIGNAL(ev);	sigaddset(evsigmask, evsignal);		return (0);}