Comment 13 for bug 1633520

Comment on attachment 127303
proposed patch

Review of attachment 127303:
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For the session bus, it would seem reasonable to search XDG_DATA_DIRS according to the basedir spec (<https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html>). I'd rather do that than invent a new environment variable.

I'm somewhat sceptical about the correctness of a Snap app-container running its own dbus-daemon - a contained app doesn't sound a lot like a login session to me (<https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-types>), and this is pretty much the opposite of the direction that the "user-session" work has gone in (<https://lists.freedesktop.org/archives/systemd-devel/2015-January/027711.html>).

However, relocating a dbus-daemon with XDG_DATA_DIRS seems potentially useful for regression testing or whatever (which is also the intended purpose of most of the environment variables that Snap app-containers (ab)use to pretend to be a namespace, AIUI).

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What is your use case for relocating the system bus?

The system bus is a bus for the system. Running a separate system bus in a container seems deeply inappropriate, unless the container is as close to whole-system as things like lxc and Docker, in which case the chroot-like environment will do the right thing anyway.