Re: Bug#983423: schroot: regression presumably in 1.6.13-4 after fixing #983423

On Sun, 18 Aug 2024 at 23:44:57 +0000, Thorsten Glaser wrote:
> On three buildds, mksh FTBFS already because the whole
> /dev/ptmx and /dev/pts stuff is malfunctioning again

Which buildds? Are you referring to -ports builds
https://buildd.debian.org/status/fetch.php?pkg=mksh&arch=powerpc&ver=59c-39&stamp=1724031073&raw=0,
https://buildd.debian.org/status/fetch.php?pkg=mksh&arch=ppc64&ver=59c-39&stamp=1724031078&raw=0,
https://buildd.debian.org/status/fetch.php?pkg=mksh&arch=sparc64&ver=59c-39&stamp=1724031447&raw=0
each of which reported
"script: failed to create pseudo-terminal: Permission denied"?

-powerpc, -sparc teams: how are those buildds
(debian-project-be-1.buildd.org, blaauw.buildd.org, sompek.debian.net)
set up?
* host system suite: testing? unstable? other?
* kernel: seems to be 6.9.12 in each case, presumably from testing/unstable
* schroot: 1.6.13-4 or some sort of backport?
* is there any container/chroot/other confinement between the host system
  and sbuild+schroot?
* any special schroot or kernel configuration?

Thorsten, I see that
https://buildd.debian.org/status/fetch.php?pkg=mksh&arch=m68k&ver=59c-39&stamp=1724031130&raw=0,
https://buildd.debian.org/status/fetch.php?pkg=mksh&arch=sh4&ver=59c-39&stamp=1724031300&raw=0
seem to be running script(1) successfully, but failing with an error
that looks different (possibly related to using qemu-user on an amd64
system). Can I assume that those are out-of-scope here?

> have you actually tested that this works?

I initially provided the patch that was recently applied to schroot back
in 2017, and unfortunately I don't completely remember what I did 7 years
ago, but I think my usual reproducer for "do pseudo-terminals work?" was
to run something like "script -c 'cat /etc/os-release' /dev/null" inside
a schroot. Is that a good mockup of what mksh needs to do, or is there
something more complicated (but hopefully simpler than mksh's full test
suite) that would be a better reproducer?

I have not been continually testing that patch for 7 years, and I didn't
make the decision to integrate it now, so I can't speak to what testing
was done before the upload that integrated it.

    smcv