[systemd-devel] Stop all uninstalled units

[Tim Cuthbertson]

Hi Folks,

I've posted a serverfault question [0], but it got no answers so I thought
I'd bring it to the mailing list:

I have some systemd units installed and running. Let's say I manually
uninstall foo.service by

 - removing its .service (and .socket) files
 - removing all symlinks (e.g from default.target.wants/)

I can run systemctl daemon-reload, and then I see:

    # systemctl status foo.service
    foo.service
       Loaded: error (Reason: No such file or directory)
       Active: active (running) since Mon 2013-07-08 13:50:29 EST; 48s ago
     Main PID: 1642 (node)

So systemd knows that it's not installed, and that it is running. Is there
some command I can use to stop all running services which no longer have a
unit file?

I do not want to have to somehow know what I've uninstalled, or for the
command to work only in some circumstances - I want something that I can
run at any point, with no additional knowledge, that will stop all units
not backed by a unit file.

I've currently got a hacky script that:
 - Runs `list-units` to get all unit names
 - Then `show -p ActiveState -p UnitFileState $unit` on each
 - It then runs `systemctl stop` on each unit with a UnitFileState of ""
(empty string), and ActiveState of anything but "failed".

This is almost certainly missing some edge case, as I couldn't really find
any documentation of these properties, it just seemed to be what occurred
with the examples I encountered.

I'm hoping there's a better way, can anyone point me in the right direction?

[0]:
http://serverfault.com/questions/521504/systemd-stop-all-uninstalled-units

Thanks,
- Tim Cuthbertson.
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