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Groups > linux.debian.kernel > #84353

Bug#1085160: linux-sysctl-defaults: apply setting after installation

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On Thu, 24 Oct 2024 at 11:25, Ben Hutchings <ben@decadent.org.uk> wrote:

>
> 1. As discussed in the GitLab MR, systemd implements a file trigger on
>    sysctl configuration files.

I'm not seeing that. There are three triggers in systemd 256.6-1 but not
for sysctl files.
Wouldn't it be in
https://salsa.debian.org/systemd-team/systemd/-/blob/debian/master/debian/systemd.triggers?ref_type=heads

2. Either:
>    (a) procps implements a similar trigger, but makes it a no-op when
>        systemd is pid 1.
>    (b) linux-sysctl-defaults postinst does:
>        - if systemd is pid 1, nothing;
>        - otherwise, if sysctl is installed, "sysctl --system";
>        - otherwise, nothing.
>
I agree that directly calling the specific file is a bad idea. A user may
have overrides in other files
which may not be caught up if you specify a file directly.

So there are a few things here:
 * A fix for linux-sysctl-defaults conf files
* Generically something for any package

If we're trying to do the first, then having something like your option b
seems a good idea.
The conf file and the postinst are the same package, so its simple. It is
actually what
#1085160 is about.

Should something, procps or linux-sysctl-defaults, be watching the sysctl.d
files
in their various locations and triggering a sysctl if they change? Or
should the
individual packages do it?

Should there be some small script that works out which sysctl to use?
If there is 'whatever-sysctl-is-here' script, where should it live?
Or would some wiki entry do it better?

 - Craig

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Thread

Bug#1085160: linux-sysctl-defaults: apply setting after installation sergio <sergio+it@outerface.net> - 2024-10-15 18:30 +0200
  Processed: Re: Bug#1085160: linux-sysctl-defaults: apply setting  after installation "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-10-18 23:10 +0200
  Bug#1085160: linux-sysctl-defaults: apply setting after installation Noah Meyerhans <noahm@debian.org> - 2024-10-18 23:10 +0200
  Bug#1085160: linux-sysctl-defaults: apply setting after installation Ben Hutchings <ben@decadent.org.uk> - 2024-10-24 02:10 +0200
    Bug#1085160: linux-sysctl-defaults: apply setting after installation Craig Small <csmall@debian.org> - 2024-10-24 12:30 +0200
      Bug#1085160: linux-sysctl-defaults: apply setting after installation Ben Hutchings <ben@decadent.org.uk> - 2024-10-30 20:10 +0100
        Bug#1085160: linux-sysctl-defaults: apply setting after installation Craig Small <csmall@debian.org> - 2024-11-04 11:50 +0100
  Processed: Re: Bug#1085160: linux-sysctl-defaults: apply setting  after installation "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-10-24 02:10 +0200
  Processed: Re: linux-sysctl-defaults: apply setting after  installation "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-11-25 00:30 +0100
  Bug#1085160: linux-sysctl-defaults: apply setting after installation Ben Hutchings <ben@decadent.org.uk> - 2024-11-25 00:30 +0100

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