in reply to Process as daemon, communicate back
Daemonizing your scripts doesn't really have anything to do with inter process communication. I know some folks use network sockets for communication between perl programs and there's some discussion over in the Q&A section under network programming section and a little bit under the programs and processes section. You could also search around the IPC modules on CPAN.
Hope that helps. I'm not experienced in these matters personally, just some observations.
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