$ ps -ef | grep dbus 105 6867 1 0 09:25 ? 00:00:18 /usr/bin/dbus-daemon --system double 13168 1 0 09:26 ? 00:00:00 dbus-launch --autolaunch 1311ebc9218d019ddfb43e004733c7b3 --binary-syntax --close-stderr double 13169 1 0 09:26 ? 00:00:00 /usr/bin/dbus-daemon --fork --print-pid 7 --print-address 9 --session
$ echo $DBUS_SESSION_BUS_ADDRESS
Looks like "Yes" to dbus running, "No" to DBUS_SESSION_BUS_ADDRESS set.
$ ps -ef | grep dbus dbus-daemon --system ddfb43e004733c7 b3 --binary-syntax --close-stderr dbus-daemon --fork --print-pid 7 --print-address 9 --session
105 6867 1 0 09:25 ? 00:00:18 /usr/bin/
double 13168 1 0 09:26 ? 00:00:00 dbus-launch --autolaunch 1311ebc9218d019
double 13169 1 0 09:26 ? 00:00:00 /usr/bin/
$ echo $DBUS_SESSION_ BUS_ADDRESS
Looks like "Yes" to dbus running, "No" to DBUS_SESSION_ BUS_ADDRESS set.