Is there an alternative to signalfd (not available on Mac OS X)? I'm multiplexing I/O using select and would like to receive signals in some synchronized fashion.
man kqueue and look for EVFILT_SIGNAL there.
The descriptor returned by kqueue() should be poll()able/select()able. Events can be registered and read out using the kevent() call.
P.S. I hope I'm not off by much, had no chance to use the kqueue myself yet.