if (socketpair(AF_UNIX, SOCK_STREAM, 0, ev_signal_pair) == -1) event_err(1, "%s: socketpair", __func__);  FD_CLOSEONEXEC(ev_signal_pair[0]); FD_CLOSEONEXEC(ev_signal_pair[1]);  event_set(&ev_signal, ev_signal_pair[1], EV_READ, evsignal_cb, &ev_signal); ev_signal.ev_flags |= EVLIST_INTERNAL;
evsignal_init(sigset_t *evsigmask){	sigemptyset(evsigmask);}