Dbus
Dbus is a messaging system used in Linux display managers such as GNOME.
Accessing Dbus[edit | edit source]
Dbus is accessed using a socket whose location is defined as an environment variable named DBUS_SESSION_BUS_ADDRESS
. Typically, it will look something like:
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-2L2ZxqLwNR,guid=9bf5b79ea33d45373491174856252e15
This environment variable must be defined in order for Dbus utilities to work properly.
Watching For Messages / Events[edit | edit source]
You can watch the dbus for messages using the dbus-monitor
utility. A filter can be passed as an argument. For example, to limit only messages sent by the GNOME SessionManager:
dbus-monitor "type=signal,sender='org.gnome.SessionManager'"
Sending Messages[edit | edit source]
Messages can be sent using dbus call
or dbus-send
.
Eg:
gdbus call --session --dest org.gnome.SessionManager \
--object-path /org/gnome/SessionManager/Presence \
--method org.gnome.SessionManager.Presence.SetStatus 0
See Also[edit | edit source]
Gnome Presence Key
Gnome Screensaver (doesn't seem to work)