Re: DBus on OS X: reintroducing "classical" X11 (auto-)start as a fall-back
Simon McVittie <simon.mcvittie-ZGY8ohtN/[email protected]>
| Newsgroups | gmane.comp.freedesktop.dbus |
|---|---|
| Organization | Collabora Ltd. |
| Message-ID | <[email protected]> |
On 21/05/15 09:53, René J.V. Bertin wrote: > The current DBus implementation for OS X only supports (auto) starting > through launchd, when the user is logged in a local, "Aqua" session. D-Bus on OS X can at least theoretically support other transports and autolaunching mechanisms; my understanding is that the IPC offered by the Darwin kernel is broadly similar to FreeBSD, so everything that works on FreeBSD ought to work on Darwin. <https://bugs.freedesktop.org/show_bug.cgi?id=18013> also mentions X11 autolaunching on OS X. However, it is entirely possible that a dbus compiled with --enable-launchd does not gracefully fall back to other possibilities. The launchd support does not follow the same code paths as X11 autolaunching, and I have never really understood why not. I would be happy to review tested patches to make them more similar. X11 autolaunching is poorly understood and not amazingly reliable, so if it is possible to do so, I would encourage OS X users to arrange for a $XDG_RUNTIME_DIR as described in <http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html> to exist, then use $XDG_RUNTIME_DIR/bus as the D-Bus Unix socket, the same as is done on Linux systems with systemd if dbus >= 1.9.14 is compiled with --enable-user-bus. dbus >= 1.9.14 can be instructed to listen on "unix:runtime=yes" to achieve that. I would also encourage you to write down the semantics that you think the session bus on OS X should have (preferably in a feature-request bug report on freedesktop.org Bugzilla) *before* trying to implement them. One of the major historical problems with X11 autolaunching is that it addresses a large, vaguely-defined and sometimes conflicting set of requirements, such that we cannot be confident that any particular change is not a regression. -- Simon McVittie Collabora Ltd. <http://www.collabora.com/> _______________________________________________ dbus mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/dbus