EVFILT_LIO
[~EVFILT_LIO] = { &null_filtops },
kev.filter = EVFILT_LIO;
kqueue_add_filteropts(EVFILT_LIO, &lio_filtops);
ATF_REQUIRE_EQ(EVFILT_LIO, kq_returned.filter);
[-EVFILT_LIO] = rw_filter_names,