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Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines

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Hi Luca,

On Sun, May 19, 2024 at 06:04:38PM +0100, Luca Boccassi wrote:
> On Sun, 19 May 2024 18:42:17 +0200 Helmut Grohne <helmut@subdivi.de>
> wrote:
> > the init process should handle SIGTERM more like an init system would
> handle that
> 
> This seems the obvious answer to me. sbuild is setting up a system such
> that its component runs as pid1, so it needs to behave like a pid1. We
> know this is special and requires supporting a number of interfaces. If
> a program doesn't, then it shouldn't be running as pid1 in a namespace.

Die you mean "... so it needs to behave like a systemd"?

sysvinit does not document SIGTERM as a supported signal.
https://manpages.debian.org/bookworm/sysvinit-core/init.8.en.html
Neither does runit.
https://manpages.debian.org/bookworm/runit/runit.8.en.html#SIGNALS
Nor did upstart.
https://sources.debian.org/src/upstart/0.6.6-1/init/main.c/#L249
Or dumb-init (forwards all signals to its children).
Or tini (forwards all signals to its children).
https://github.com/krallin/tini/blob/master/src/tini.c#L525
Or busybox (see busybox init --help).
But openrc-init and it then performs a shutdown.
https://sources.debian.org/src/openrc/0.54-2/src/openrc-init/openrc-init.c/#L210

As far as my research goes, this handling of SIGTERM is specific to
systemd and not a generic assumption of pid1.

Helmut

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Thread

Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Helmut Grohne <helmut@subdivi.de> - 2024-05-19 18:50 +0200
  Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-19 19:10 +0200
    Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Helmut Grohne <helmut@subdivi.de> - 2024-05-19 23:20 +0200
      Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Chris Hofstaedtler <zeha@debian.org> - 2024-05-20 01:10 +0200
        Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Helmut Grohne <helmut@subdivi.de> - 2024-05-20 07:30 +0200
          Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-05-20 07:40 +0200
            Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Chris Hofstaedtler <zeha@debian.org> - 2024-05-20 10:50 +0200
              Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-05-20 11:30 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-20 11:30 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Aurelien Jarno <aurel32@debian.org> - 2024-05-20 11:40 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-20 11:50 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Aurelien Jarno <aurel32@debian.org> - 2024-05-20 12:00 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-20 12:10 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-05-20 16:20 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-20 16:20 +0200
              Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Aurelien Jarno <aurel32@debian.org> - 2024-05-20 11:50 +0200
                Bug#1071462: installing/upgrading libc6 does not work in sbuild when systemd is installed as ischroot declines Luca Boccassi <bluca@debian.org> - 2024-05-20 16:00 +0200

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