[[!comment format=mdwn username="http://smcv.pseudorandom.co.uk/" nickname="smcv" subject="comment 5" date="2012-07-31T09:58:13Z" content=""" It's `org.gtk` because gvfs, GLib and Gtk are all products of gtk.org (there is no separate glib.org). It's `Private` because the gvfs developers don't consider its D-Bus interface to be stable API, I believe. The official API for it is the C API in GIO, part of GLib. To poll for changes to /proc/mounts on Linux, you open it for reading and poll() for POLLERR (not sure why it gets to be different, but it is). See gio/gunixmounts.c in recent GLib. """]]