Only start logind if dbus is installed

logind fails to start in environments without dbus, such as LXC containers or
servers. Add a startup condition to avoid the very noisy startup failure.

Consider both dbus-daemon (the reference implementation) and
dbus-broker.

Part of #772700

Gbp-Pq: Topic debian
Gbp-Pq: Name Only-start-logind-if-dbus-is-installed.patch

diff --git a/units/systemd-logind.service.in b/units/systemd-logind.service.in
index 042ea75d7abd6e04c069ad55b492ec672aea072d..89a7c8937cb0c115f978f0acbfe607e06b2bbf83 100644 (file)
--- a/units/systemd-logind.service.in
+++ b/units/systemd-logind.service.in
@@ -16,6 +16,8 @@ Documentation=man:org.freedesktop.login1(5)
 
 Wants=user.slice modprobe@drm.service
 After=nss-user-lookup.target user.slice modprobe@drm.service
+ConditionPathExists=|/lib/systemd/system/dbus.service
+ConditionPathExists=|/lib/systemd/system/dbus-broker.service
 
 # Ask for the dbus socket.
 Wants=dbus.socket