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   Lennart Poettering (pid_eins@mastodon.social)'s status on Wednesday, 28-Feb-2024 03:26:27 JST Lennart Poettering

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   • Ian Douglas Scott

   @ids1024 @zeenix

   systemd has been using Varlink for various things internally a lot, and now started to expose APIs to outside via Varlink too.

   And we pass around fds via it a lot. It's not part of the Varlink protocol itself so much though. It's more a part of the transport.

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     Ian Douglas Scott (ids1024@fosstodon.org)'s status on Wednesday, 28-Feb-2024 03:26:28 JST Ian Douglas Scott

     @zeenix @pid_eins I've not seen varlink before. Looks like it doesn't support passing file descriptors? Which many DBus interferences need.

     DBus, Wayland, Pipewire and the like all implement different systems for typed messages over Unix sockets that can contain file descriptors. It would be nice if there was one standard for that, with an IDL, and possibly a better kernel API (microkernel APIs like `mach_msg` are worth comparing).

     But we're kind of stuck supporting what exists.