SYSEVENTD(8)

The kernel System Event notification Daemon

• .Ny usr/src/lib/libsysevent/libsysevent.c

There are two (2) consecutive calls to door_return at the bottom of the event_deliver_service server procedure:

return_from_door:
    (void) door_return((void *)&ret, sizeof (ret), NULL, 0);
    (void) door_return(NULL, 0, NULL, 0);
}

This procedure is replete with goto return_from_door; statements. Perhaps the first call is expected to fail for some reason, and the second is either infallible or a Hail Mary pass?