At 12:08 +0200 7/10/09, Thomas Clement wrote:
This seems to be incompatible with the idea of launching the agent on-demand (not keeping it alive all the time).
Indeed. launchd is not really structured to support that. Services are pulled in from top to bottom. The user logs in, which pulls in an agent, which pulls in the daemon. Going the other way is tricky, and generally not recommended. The typical solution to this problem is to have a lightweight agent that's always running that connects up to the daemon and launches any requested heavyweight agents in response to requests from the daemon. This is exactly the <x-man-page://8/UserEventAgent> is all about. Unfortunately, at least for you, the UserEventAgent plug-in mechanism is not public. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware