[buildd-tools-devel] Bug#849169: Bug#849168: pbuilder: Expect programe reported "no more ptys" and failed in rebuilding gcc with normal (non-root) user

[James Clarke]

reassign 849168 debootstrap
forcemerge 817236 849168
thanks

Hi,
> On 23 Dec 2016, at 06:24, Xiangyu LIU <u122334 at gmail.com> wrote:
> 
> Package: pbuilder
> Version: 0.227
> Severity: minor
> 
> Dear Pbuilder Maintainers,
> 
>   I want to rebuild locally gcc-5 and gcc-4.9 in current stretch by pbuilder.
> 
> 
>   I download the source of gcc-5 (Debian) and gcc-4.9 (from Ubuntu) and rebuild by "sudo pbuilder build gcc-xxxxx.dsc".
>   But building failed with reporting:
>      "The system has no more ptys. Ask your system administrator to create more."
>      "while executing"
>      "spawn ls"
> 
>   I gave a try in Pbuilder with root user:
>   # expect -c "spawn ls"
>   It is OK to output "spawn ls"
> 
>   But when I type above command with normal user:
>   rleigh at WFA256:/$ expect -c "spawn ls"
>                     spawn ls
>                    The system has no more ptys.  Ask your system administrator to create more.
>                    while executing
>                    "spawn ls"
>   rleigh at WFA256:/$
> 
>   I check the /dev/pts, it was mounted in Pbuilder (with both root/normal users):
>       rleigh at WFA256:/$ mount | grep pts
>                        none on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
> 
>       root at WFA256:/# mount | grep pts
>                        none on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
> 
> 
>   I have same issue in sbuild if I rebuild gcc by:
>      $ sbuild -d stretch gcc-xxxx.dsc
> 
>   But it is OK if rebuild with root user:
>      $ sudo sbuild -d stretch gcc-xxxx.dsc
> 
> 
>   Yes I can rebuild gcc by sudo sbuild, but I don't know what is happening in Pbuilder or Sbuild with normal user.
>   Any comment or advice would be very appreciated !

This is a known issue with debootstrap (#817236 as mentioned above)
which affects any tool trying to use a chroot. Josch, I'm curious as to
why you tagged the corresponding sbuild bug report (Cc'd) as
unreproducible; are you using debootstrap from stable? Anyway, I suggest
you also merge the build bug with the debootstrap one.

Regards,
James