Bug#898388: systemd-sysv: shutdown command always fails

[Meeuwissen Olaf]

Hi,

Thanks for the quick follow-up.

Michael Biebl writes:

> Control: tags -1 + moreinfo
>
>> I have set up unattended-upgrades to reboot my machine at 04:00 when
>> necessary.  Internally, unattended-upgrades runs
>>
>>   /sbin/shutdown -r 04:00
>>
>> trying to achieve this.  This fails as evidenced by these (dated) log
>> messages
>>
>>   Apr 25 06:55:18 easy apt.systemd.daily[38369]: Found /var/run/reboot-required, rebooting
>>   Apr 25 06:55:18 easy apt.systemd.daily[38369]: Failed to connect to bus: No such file or directory
>
> What's the output of
> systemctl status dbus.socket dbus.service systemd-logind.service

  $ sudo systemctl status dbus.socket dbus.service systemd-logind.service
  Unit dbus.socket could not be found.
  Unit dbus.service could not be found.
  * systemd-logind.service - Login Service
     Loaded: loaded (/lib/systemd/system/systemd-logind.service; static; vendor preset: enabled)
     Active: inactive (dead)
  Condition: start condition failed at Fri 2018-05-11 04:00:25 JST; 10h ago
             `- ConditionPathExists=/lib/systemd/system/dbus.service was not met
       Docs: man:systemd-logind.service(8)
             man:logind.conf(5)
             http://www.freedesktop.org/wiki/Software/systemd/logind
             http://www.freedesktop.org/wiki/Software/systemd/multiseat

Yes, I don't have dbus installed.  Nothing I have installed has a
dependency on it that is Depends: or more important.  I don't install
Recommends: and actively remove them unless other installed packages
declare a (Pre-)Depends:

Based on my understanding of the relevant section[1] in the Debian
Policy, I would argue that systemd-sysv needs a Depends: dbus.

 [1]: https://www.debian.org/doc/debian-policy/#binary-dependencies-depends-recommends-suggests-enhances-pre-depends

The Recommends: that systemd declares looks fine as I have not observed
any other breakage.

FTR, after I install dbus, I get

  $ sudo shutdown -r 04:00
  Shutdown scheduled for Sat 2018-05-12 04:00:00 JST, use 'shutdown -c' to cancel.

Hope this helps,
--
Olaf Meeuwissen, LPIC-2       FLOSS Engineer -- EPSON AVASYS CORPORATION
       Free Software Foundation Associate Member since 2004-01-27
    Support Free Software                  https://my.fsf.org/donate
    Join the Free Software Foundation        https://my.fsf.org/join