Bug#1108092: sbuild: [unshare] E: Sub-process cat >&11 returned an error code (2)

[Jochen Sprickerhof]

* picca <pi...@debian.org> [2025-06-23 11:22]:

git clone https://salsa.debian.org/picca/pkg-haskell-tools

to reproduce the issue

create a p directory in the repository
cd pkg-haskell-tools
mkdir p
cd p && apt source ufo-core
cd ..
cabal run make-all -- --unshare

Thanks, I was able to reproduce this after

apt build-dep pkg-haskell-tools

and installing some more packages.

The problem is that make-all leaks file descriptors:

$ ls -l /proc/423642/fd/
lr-x------ 1 jspricke jspricke 64 23. Jun 13:30 0 -> 'pipe:[412637]'
l-wx------ 1 jspricke jspricke 64 23. Jun 13:30 1 -> 'pipe:[418570]'
l-wx------ 1 jspricke jspricke 64 23. Jun 13:30 2 -> 'pipe:[418556]'
lr-x------ 1 jspricke jspricke 64 23. Jun 13:30 3 -> /usr/bin/mmdebstrap
lrwx------ 1 jspricke jspricke 64 23. Jun 13:30 4 -> 
/home/jspricke/pkg-haskell-tools/lab/.shake/.shake.lock
lrwx------ 1 jspricke jspricke 64 23. Jun 13:30 5 -> 
/home/jspricke/pkg-haskell-tools/lab/.shake/.shake.database
lr-x------ 1 jspricke jspricke 64 23. Jun 13:30 6 -> 
/home/jspricke/pkg-haskell-tools/lab/cache/binaries/ufo-core.txt

(I used a sleep(9999); at the beginning of mmdebstrap to get this.)

I guess you want to set close_fds here:

https://hackage.haskell.org/package/process-1.0.1.1/docs/System-Process.html#t%3ACreateProcess



* picca <pi...@debian.org> [2025-06-23 11:27]:

Maybe mmdebstrap could also close the fie descriptors before running the shell commands @josch?

You need also to add this in your sbuild configuration

$unshare_bind_mounts = [ { directory => "/dev/shm", mountpoint => "/sharedshm" } ];

Can you give some reasoning why you want to do that?

signature.asc
Description: PGP signature