[buildd-tools-devel] Bug#641065: sbuild fails to install chroot packages if uid / gid is > 99999999

[Jan-Marek Glogowski]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Package: sbuild
Version: 0.62.6-1
Tags: patch

Hi

sbuild fails to install packages into the chroot using the apt resolver, 
if the building user has a uid or gid > 99999999. I guess the aptitude 
resolver will fail too.

Local sources
─────────────

sbuild_0.62.6-1~lhm1.dsc exists in .; copying to chroot

Check arch
──────────

Merged Build-Depends: build-essential, fakeroot
Filtered Build-Depends: build-essential, fakeroot
dpkg-deb: building package `sbuild-build-depends-core-dummy' in 
`/build/resolver-owjRNQ/apt_archive/sbuild-build-depends-core-dummy.deb'.
E: Corrupted archive
E: Errors apply to file 
'/«CHROOT»/build/resolver-owjRNQ/apt_archive/sbuild-build-depends-core-dummy.deb'
OK
Reading package lists...

This "E:"s are from 'apt-ftparchive generate' complaining about a "broken" 
deb file, because the include data.tar.gz and control.tar.gz contain 
"invalid" uid / gid fields, as GNU tar includes large uids / gids in "GNU 
256-bit encoding".

- From a busybox git commit:

/*
  * GNU tar uses "base-256 encoding" for very large numbers (>8 billion).
  * Encoding is binary, with highest bit always set as a marker
  * and sign in next-highest bit:
  * 80 00 .. 00 - zero
  * bf ff .. ff - largest positive number
  * ff ff .. ff - minus 1
  * c0 00 .. 00 - smallest negative number
  *

The attached patch detects a broken 'apt-ftparchive generate' run, 
rebuilds the dummy package using FAKEROOT, and reruns apt-ftparchive on 
the fixed package.

Comments welcome,

Jan-Marek
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAk5qyM4ACgkQj6MK58wZA3dYtgCcCj+6chw8QI/59mIzDFFig2wA
+dMAoJvkbRSPrRAXuRASF6XouKKC5mc3
=nM5F
-----END PGP SIGNATURE-----
-------------- next part --------------
A non-text attachment was scrubbed...
Name: sbuild_workaround-broken-apt-ftparchive.diff
Type: text/x-diff
Size: 3380 bytes
Desc: 
URL: <http://lists.alioth.debian.org/pipermail/buildd-tools-devel/attachments/20110910/f982b425/attachment.diff>