1) Is it possible to set up launchd to not launch the process at
login, but to shut it down at logout?
It may not be necessary. See
http://developer.apple.com/qa/qa2001/qa1133.html for some
notifications you can subscribe to that are sent when a user logs
out. Granted, the samples are really, really old (in the lifetime of
OS X) but they should still be accurate.
2) I want this all to be controlled by my preference pane.
Obviously, it's no trouble to get it to write out the required plist
file, but the part I'm not sure about is how to do the equivalent of
a "launchctl load" or "launchctl unload" operation. I could exec
this, I guess, but I prefer to use a proper C API rather than the
exec mechanism whenever I can.
Again, notifications are sexy. If you can reload the preferences and
handle the changes without a relaunch, you can just send a
notification from the preference pane and receive them in the daemon.
This is what I do and it works really well.
--
Sincerely,
Rosyna Keller
Technical Support/Holy Knight/Always needs a hug
Unsanity: Unsane Tools for Insanely Great People
It's either this, or imagining Phil Schiller in a thong.
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