[systemd-devel] systemd --user managers after systemd upgrade

[Mike Gilbert]

On Sat, Jun 29, 2024 at 4:22 PM Luca Boccassi <luca.boccassi at gmail.com> wrote:
>
> On Sat, 29 Jun 2024 at 21:16, Mike Gilbert <floppym at gentoo.org> wrote:
> >
> > I recently added systemd v256 to Gentoo's ebuild repo. While testing
> > the upgrade process from v255, I have run into an issue.
> >
> > After the upgrade, my KDE Plasma session stopped working, and I was
> > unable to execute a reboot from the GUI.
> >
> > Looking at the journal, I see several messages like this one:
> >
> > Jun 29 14:21:30 naomi systemd[2387904]:
> > /usr/lib/systemd/systemd-executor (deleted): error while loading
> > shared libraries: libsystemd-core-255.so: cannot open shared object
> > file: No such file or directory
> >
> > It appears to be executing a deleted binary
> > (/usr/lib/systemd/systemd-executor), likely via /proc/1/fd/..., and
> > then fails when loading a deleted shared library
> > (libsystemd-core-255.so).
> >
> > The new versions of these files do exist on the filesystem. Also, I
> > was able to reboot the system by switching to a text console and
> > pressing ctrl-alt-delete.
> >
> > Any idea what happened here? I'm not sure if this is a systemd bug, or
> > if I missed something in my packaging script (ebuild).
>
> This is a known issue, your packaging scripts _must_ reexec both the
> system instance and all user instances. For the latter you can just
> do:
>
> systemctl kill --kill-whom='main' --signal='SIGRTMIN+25' 'user@*.service'

Thanks to you and Mantas, this was exactly the sort of workaround I
was looking for.