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Devuan bug report logs - #881
invoke-rc.d: Policy layer may override runlevel constraint

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Package: init-system-helpers; Maintainer for init-system-helpers is Devuan Dev Team <devuan-dev@lists.dyne.org>; Source for init-system-helpers is src:init-system-helpers.

Reported by: Opty <opty77@gmail.com>

Date: Tue, 1 Apr 2025 12:16:02 UTC

Severity: normal

Tags: debian, moreinfo

Merged with 882, 883, 884

Found in version init-system-helpers/1.65.2devuan1

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In-Reply-To: <Z-4u39maG54wqFRF@hindley.org.uk>
From: Opty <opty77@gmail.com>
Date: Thu, 3 Apr 2025 13:16:40 +0200
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Message-ID: <CAERDJOG2SLOG-=ouK4QwDc_-d4CQz=Maf1yRO9-1ioBvYhuWBw@mail.gmail.com>
Subject: Re: bug#881: invoke-rc.d: Policy layer may override runlevel constraint
To: Mark Hindley <mark@hindley.org.uk>
Cc: 881@bugs.devuan.org
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On Thu, Apr 3, 2025 at 8:46 AM Mark Hindley <mark@hindley.org.uk> wrote:
> On Wed, Apr 02, 2025 at 11:27:15PM +0200, Opty wrote:
> > You may want to upgrade ASAP but restart when convenient (e.g. during
> > low traffic at night) but maybe also a habit from Slackware in my
> > case.
>
> That isn't conventional Debian practice.

I could continue using the policy layer unmodified, selectively allow
what I need (extra work) and keep denied the rest

-or-

modify invoke-rc.d or rather policy-rc.d to check
$DPKG_MAINTSCRIPT_NAME (to detect preinst, postinst, prerm or postrm
script), crosscheck $DPKG_MAINTSCRIPT_PACKAGE vs. $INITSCRIPTID
(substring of each other) to allow calling other scripts and
eventually do nothing, maybe ask the administrator.

Both seem unintentional error- or side-effect-prone.

I could also just modify invoke-rc.d to skip the querypolicy call in
case of K link.

> > > To start or not on install is specified in the package by the maintainer.
> >
> > On our VPS I haven't found any which doesn't start service on package install.
>
> It certainly isn't common. But, for example, look at src:netperf: d/rules has
>
> override_dh_installinit:
>         dh_installinit --no-enable --no-start
>
> and the daemon is not started on install.

Maybe dh_installinit could support conditional start based on
environment variable.

Regards,
Opty

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Last modified: Fri Apr 4 15:34:22 2025;