Bug#811497: Unclean shutdown after switch from sysvinit-core to systemd-sysv if systemd-shim is installed (and running)

[Michael Biebl]

clone: 811497 -1
retitle: -1 systemd-shim process is not stopped on remove
reassign: -1 systemd-shim
clone: 811497 -2
retitle: -2 systemd-shim fails to shutdown after switch to systemd-sysv
reassign: -2 systemd-shim

Am 19.01.2016 um 15:16 schrieb Michael Biebl:
> Am 19.01.2016 um 15:10 schrieb Michael Biebl:
>> Am 19.01.2016 um 15:01 schrieb Michael Biebl:
>>> Package: systemd-sysv
>>> Version: 228-4
>>> Severity: important
>>>
>>> If sysvinit-core is the active PID 1 and systemd-shim is installed and
>>> running, installing systemd-sysv will lead to an unclean shutdown and a
>>> dirty file system on the next boot.
>>>
>>> Afaics, the problem is, that /sbin/{reboot,poweroff,shutdown} as shipped
>>> by systemd-sysv does not talk to PID 1 via /run/initctl but uses D-Bus
>>> if the org.freedesktop.systemd1 D-Bus name is taken, which is the case
>>> if systemd-shim is installed.
>>
>> Small correction here: systemd-shim does not need to be running prior to
>> calling reboot. Merely being installed is sufficient, as systemd-shim is
>> D-Bus activated, so will be started on demand.
> 
> Martin and Ansgar suggested on IRC, that we could/should add a
> Conflicts: systemd-shim to systemd-sysv.
> 
> In general, that is probably the right thing to do anyway, but in this
> particular case, we run into another issue: the systemd-shim process is
> not stopped when the systemd-shim package is uninstalled (a bug on its
> own). We could possibly fix that via a stable upload for systemd-shim.

There are two issues here in systemd-shim, which should be fixed
(ideally with a stable upload):

- If sysvinit is the active PID, systemd-shim is installed and the user
install systemd-sysv, running reboot will trigger a D-Bus request which
starts systemd-shim. This in turn will call /sbin/reboot, which calls
systemd-shim and so on. It seems, that eventually reboot -f is called,
which leads to the unclean shutdown.

- The systemd-shim process is not stopped when the package is removed.



-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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