Hi! Let's say I have a daemon that listens on a TCP port. The exact port number can be configured, i.e. it is not fixed. It might even change when the user changes the configuration, albeit not very often. Actually this daemon is a HTTP server that serves status information about a service. Thus it will not be used most of the time. Always running the server would be a waste of resources IMHO and I want avoid that by making it an on-demand service. Is it possible to make launchd launch the daemon on demand when a connection request comes in? If so how would I specify this in the launchd.plist file, taking into account the varying TCP port number? Currently I'd immagine that I need to 'launchctl stop' the service, modify the associated launchd.plist to reflect the currently configured port and then 'launchctl start' the service. Unless of course there is a better way that doesn't involve changing the launchd.plist? Not sure if this is relevant but the daemon does not use Bonjour at the moment to advertise its service. That could be added though (and might be a good idea for other reasons). I tried to find similar services, for example the Apache Web Server. But while it uses configurable port numbers it does not launch on demand unfortunatly. So I can't use it as an example of how to do this. Thanks! Mike -- Mike Fischer Softwareentwicklung, EDV-Beratung Schulung, Vertrieb Web: <http://homepage.mac.com/mike_fischer/index.html> Note: I read this list in digest mode! Send me a private copy for faster responses.