Zbigniew Jędrzejewski-Szmek
8a27100d06
In recent Fedora, preset-all fails:
[ 155s] Failed to preset unit: File '/buildroot/etc/systemd/user/dbus.service'
already exists and is a symlink to /usr/lib/systemd/user/dbus-broker.service
[ 155s] ‣ "systemctl --root=/buildroot --global preset-all" returned non-zero exit code 1.
Strictly speaking, this is an error in configuration. The presets specify that
both dbus-broker.service and dbus-daemon.service shall be enabled and they both
claim the 'dbus.service' alias. But this kind of error is very easy to make.
Failing the preset operation is too harsh, since in most cases the system will
work fine without an alias and changes in unrelated components can cause the
conflict.
Let's reuse the same logic that was added in
ad5fdd3912: when enabling the unit through
'preset' or 'preset-all', print the message, but suppress the error. When
enabling through 'enable', fail the operation.
System and Service Manager
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