[buildd-tools-devel] Bug#801141: Bug#801141: sbuild: Failed to lock chroot: /var/lib/sbuild/unstable-i386.tar.gz: File is not owned by user root

[Johannes Schauer]

Hi,

Quoting picca (2015-10-06 19:26:56)
> Hello, When I try to use sbuild, I get this error message
> 
> E: unstable-i386-sbuild-22146117-8358-467e-a857-9e8d4c79e747: Failed to lock chroot: /var/lib/sbuild/unstable-i386.tar.gz: File is not owned by user root
> Chroot setup failed
> 
> as you can see
> 
> $ ls -l /var/lib/sbuild/
> total 440420
> drwxrws---  2 sbuild sbuild      4096 juil.  6 16:35 apt-keys
> drwxrws---  2 sbuild sbuild      4096 oct.   5 08:40 build
> drwxr-xr-x 21 sbuild sbuild      4096 oct.   3 10:44 unstable-i386
> -rw-r--r--  1 sbuild sbuild 450976170 oct.   3 10:50 unstable-i386.tar.gz
> 
> 
> So what is the properway to fix this.
> The .tar.gz chroot was created using sbuild-creatchroot

I guess you used the instructions from this wiki page:
https://wiki.debian.org/sbuild

And called something like:

sudo sbuild-createchroot  --arch=i386 --make-sbuild-tarball=/var/lib/sbuild/unstable-i386.tar.gz unstable `mktemp -d` http://httpredir.debian.org/debian

You can specify any location for the chroot tarball. The wiki page choose
/var/lib/sbuild/. The "problem" with this is, that the postinst maintainer
script of sbuild calls `chown -R sbuild:sbuild /var/lib/sbuild`. This in turn
leads to your chroot tarball being owned by user and group "sbuild" instead of
user and group "root" as which it was created.

Since the chown call is part of the postinst, an sbuild user will always run
into this problem after the upgrade sbuild with a chroot tar.gz location from
the sbuild wiki page.

The quick fix is to call:

sudo chown root:root /var/lib/sbuild/unstable-amd64.tar.gz

But ultimately, the chown call in the sbuild postinst is probably a bad idea in
the first place...

cheers, josch
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