Devuan bug report logs - #688
systemctl infinite loop, missing /bin/systemctl symlink

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From: "Devuan bug Tracking System" <owner@bugs.devuan.org>
To: Jernej Jakob <jernej.jakob@gmail.com>
Subject: bug#688 closed by dak@devuan.org (#688: fixed in src:systemctl-service-shim
 version 0.0.3-1)
Message-ID: <handler.688.D688.165764592414218.notifdone@bugs.devuan.org>
References: <1657641217.264785.16631.nullmailer@dak.localnet.devuan.org>
 <20220707215250.35bd392b@gentoo.home>
X-Devuan-PR-Message: they-closed 688
X-Devuan-PR-Package: systemctl-service-shim
X-Devuan-PR-Keywords: stable
Reply-To: 688@bugs.devuan.org
Date: Tue, 12 Jul 2022 17:14:05 +0000
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This is an automatic notification regarding your bug report
which was filed against the systemctl-service-shim package:

#688: systemctl infinite loop, missing /bin/systemctl symlink

It has been closed by dak@devuan.org.

Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact dak@devuan.org by
replying to this email.


-- 
688: https://bugs.devuan.org/cgi/bugreport.cgi?bug=688
Devuan Bug Tracking System
Contact owner@bugs.devuan.org with problems

[Message part 2 (message/rfc822, inline)]

From: dak@devuan.org

To: 688-done@bugs.devuan.org

Subject: #688: fixed in src:systemctl-service-shim version 0.0.3-1

Date: Tue, 12 Jul 2022 15:53:37 +0000

Version: 0.0.3-1

Source package systemctl-service-shim (0.0.3-1) added to Devuan suite unstable.

This closes bug report 688.

Thanks

DAK managing the Devuan archive

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Format: 1.8
Date: Tue, 12 Jul 2022 10:52:37 -0400
Source: systemctl-service-shim
Architecture: source
Version: 0.0.3-1
Distribution: unstable
Urgency: low
Maintainer: B. Stack <bgstack15@gmail.com>
Changed-By: B. Stack <bgstack15@gmail.com>
Closes: 688
Changes:
 systemctl-service-shim (0.0.3-1) unstable; urgency=low
 .
   * Add /bin/systemctl symlink directly to package (Closes: #688)
   * Action `try-restart` is simplified to `restart`
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[Message part 3 (message/rfc822, inline)]

From: Jernej Jakob <jernej.jakob@gmail.com>

To: submit@bugs.devuan.org

Subject: systemctl infinite loop, missing /bin/systemctl symlink

Date: Thu, 7 Jul 2022 21:52:50 +0200

Package: systemctl-service-shim
Version: 0.0.1-1
Severity: grave
Tags: stable

When executing the "enable" action, systemctl enters into an infinite
loop.

# /bin/systemctl enable chrony.service
update-rc.d chrony enable
insserv: warning: script 'cgroups' missing LSB tags
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `cgroups'
insserv: Default-Stop  undefined, assuming empty stop runlevel(s) for script `cgroups'
 * rc-update: chrony already installed in runlevel `default'; skipping
update-rc.d chrony enable
insserv: warning: script 'cgroups' missing LSB tags
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `cgroups'
insserv: Default-Stop  undefined, assuming empty stop runlevel(s) for script `cgroups'
 * rc-update: chrony already installed in runlevel `default'; skipping
update-rc.d chrony enable

Additionally, there is no /bin/systemctl, as the script is installed to
/usr/sbin/systemctl, so some scripts that call a hardcoded binary path
/bin/systemctl won't work without manually creating a symlink after
installation.

I see some code to manipulate the symlink was added in 0.0.2
https://git.devuan.org/devuan/systemctl-service-shim/commit/abd012174f9545f4d4bd236716e51dedcad8c6f1
if I understand it correctly, it's a workaround (fix) for this infinite
loop problem which is caused by the init scripts calling systemctl
again.

In my opinion, the symlink should also be created in the package
postinst script. This way packages that depend on /bin/systemctl
will work immediately without manual symlink creation. There should be
no conflict with systemd, as the package already has a conflict with
systemd, it will never be simultaneously installed.

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