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Devuan bug report logs - #723
init-system-helpers: update-rc.d calls systemctl on a SysVinit system, creating a recursion

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Package: systemctl-service-shim; Maintainer for systemctl-service-shim is B. Stack <bgstack15@gmail.com>; Source for systemctl-service-shim is src:systemctl-service-shim.

Reported by: wolfgang@leila.ping.de (Wolfgang Wegner)

Date: Sun, 13 Nov 2022 18:08:01 UTC

Severity: normal

Tags: moreinfo

Fixed in version 0.0.7

Done: dak@devuan.org

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Subject: bug#723: init-system-helpers: update-rc.d calls systemctl on a SysVinit system, creating a recursion
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References: <20221112202017.GC7301@leila.ping.de> <mailman.325.1668421564.4883.devuan-bugs@lists.dyne.org> <mailman.326.1668421916.4883.devuan-bugs@lists.dyne.org> <Y3IeJHl8+MEmIovl@hindley.org.uk> <20221112202017.GC7301@leila.ping.de>
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From: B Stack <bgstack15@gmail.com>
Date: Mon, 14 Nov 2022 07:50:26 -0500
Message-ID: <CABSMGanMGWc5h++XJ+s2+LQZuF2puYxPS4WLHtYsi5D2ZECUVw@mail.gmail.com>
To: Mark Hindley <mark@hindley.org.uk>
Cc: 723@bugs.devuan.org, 732-sumbitter@bugs.devuan.org
Content-Type: text/plain; charset="UTF-8"

Hi,

The systemctl-service-shim main script /usr/bin/systemctl also has a
symlink at /bin/systemctl. If the script is called from /bin/systemctl
then it will remove this symlink during operations to avoid the
recursive calls like you see happening here. You can check the
relevant logs at /var/log/systemctl.log, and please share them here.

The systemctl service shim script has a known problem particularly on
the "enable" action [0] that I thought was fixed. The logs, if you can
share them, might help make an improvement such as the script getting
called in a particular way where it also needs to remove the symlink
to prevent infinite recursion.

B. Stack
[0]: https://bugs.devuan.org/cgi/bugreport.cgi?bug=688

On Mon, Nov 14, 2022 at 5:53 AM Mark Hindley <mark@hindley.org.uk> wrote:
>
> Antony,
>
> On Mon, Nov 14, 2022 at 11:31:39AM +0100, Where all about bugs in Devuan packages is reported wrote:
> > > Hmmm, I get completely different behaviour with that command:-
> > >
> > > mark@apollo:~% sudo update-rc.d enable rsyslog
> > > usage: update-rc.d [-f] <basename> remove
> > >        update-rc.d [-f] <basename> defaults
> > >        update-rc.d [-f] <basename> defaults-disabled
> > >        update-rc.d <basename> disable|enable [S|2|3|4|5]
> > >                 -f: force
> >
> > Um, "update-rc.d rsyslog enable" != "update-rc.d enable rsyslog".
>
> Thanks for pointing out my obvious (but not to me!) mistake.
>
> So I can now reproduce this, but only if systemctl-service-shim is installed. If
> it is removed, update-rc.d behaves as expected.
>
> [Adding bgstack15]
>
> Is this an issue in the way systemctl-service-shim behaves? I don't see it with
> systemctl on a Debian sysvinit system.
>
> Thanks.
>
> Mark

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