event_set
event_set(&chan->rd_ev, fd, EV_READ | EV_PERSIST, channel_read, chan);
event_set(&chan->wr_ev, fd, EV_WRITE, channel_start, chan);
event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL);
event_set(&env.sc_iev->ev, env.sc_iev->ibuf.fd, env.sc_iev->events,
event_set(&env.sc_iev_dns->ev, env.sc_iev_dns->ibuf.fd,
event_set(&ye->ye_event, i, EV_READ, yp_fd_event, NULL);
event_set(&env.sc_iev->ev, env.sc_iev->ibuf.fd, env.sc_iev->events,
event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev->data);
event_set(&env.sc_iev->ev, env.sc_iev->ibuf.fd, env.sc_iev->events,