[launchd-dev] LAUNCH_KEY_GETJOB returns MACH_PORT_NULL?

Hey all.. So when I send a LAUNCH_KEY_CHECKIN message, I get a dictionary back with all the mach ports filled in for my mach services. However, if I send a LAUNCH_KEY_GETJOB from an external process I get MACH_PORT_NULL for all of the mach ports. I can look them up by using bootstrap_look_up, or NSMachBootstrapServer, but I was wondering what the reasoning was behind not returning them from a LAUNCH_KEY_GETJOB lookup? It appears to be an intentional design decision. (This is what I'm seeing on 10.5 at least. Perhaps it's different on 10.6?) Cheers, Dave