Dbus: Difference between revisions
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* http://unix.stackexchange.com/questions/107787/how-can-i-trigger-the-screensavers-locking-feature-using-d-bus-from-the-command | * http://unix.stackexchange.com/questions/107787/how-can-i-trigger-the-screensavers-locking-feature-using-d-bus-from-the-command | ||
[[Category:Linux]] | {{Navbox Linux}}[[Category:Linux]] | ||
[[Category:LinuxUtilities]] | |||
Latest revision as of 23:24, 14 June 2020
Dbus is a messaging system used in Linux display managers such as GNOME.
Accessing Dbus
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
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
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
Gnome Presence Key
Gnome Screensaver (doesn't seem to work)