small addendum: in my initial research, i left out the topic of avahi-publish, which is a process that does nothing but publish a service.
while avahi-publish could both be used by the daemons themselves and init scripts, i'd like to keep the proposal upright. adding and removing a file to/from a directory is easier to handle in an init script that keeping a second process alive, which involves starting start-stop-daemon another time, keeping track of another pid file, and last but not least having another process linger around -- avahi-daemon can already do what the avahi-publish process would do with less overhead. for sake of completeness, here's what i should have written about avahi-publish in the "existing solutions" section: * using avahi-publish a relatively simple option, which only requires the daemon to launch a sub-process and handle it until shutdown. before "well, so a simple solution for daemons to announce sth already exists", please keep in mind that even if it's relatively simple, announcing services without upstream support would still mean a patch to the daemon in question, as opposed to two lines in the init script.
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