> What I've done in the past is install a signal handler which tells the OS to
> ignore the signal, but also schedules a future callback on the main thread
> (via the runloop) that will then cleanly shut down the process. You probably
> want to catch the signals generated by Ctrl-C or a 'kill' command; IIRC that
> would be SIGINT, but my memory is hazy.
Here's some example code:
http://developer.apple.com/mac/library/samplecode/PreLoginAgents/listing2.html
See InstallHandleSIGTERMFromRunLoop()
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