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  • Do named pipes do what you want? If not, edit to explain why. Commented Nov 22, 2017 at 19:43
  • Hmm... as far as I'm aware named pipes only have one consumer, or at least the lines are only received by the earliest connected pipe. Commented Nov 22, 2017 at 19:46
  • Hmm, the O_ASYNC flag to open might cause data to be sent to all connected processes. Commented Nov 22, 2017 at 19:58
  • I don't think this async mode is particularly related. It just seems like a way to "wake up a process" when it should be reading or writing. Commented Nov 22, 2017 at 20:17
  • 1
    Maybe. I would note that language as a rule tends to be ambiguous because the world is quite big :P. I think most people would view using a pipe as quite different in nature from, say, a RabbitMQ server. I guess what I really mean is "without having to setup, manage, configure and monitor a process." I'll update the question to this effect. Things like dbus are an interesting middleg-round: always running and (I think?) configuration-free. This does make me depend on X... I think. Commented Nov 22, 2017 at 22:50