[pacman-dev] Non-existing user/group ownership and chroot

Armin K. krejzi at email.com
Mon Mar 6 16:40:45 UTC 2017

On 06.03.2017 14:45, Andrew Gregory wrote:
> On 03/06/17 at 10:12am, Armin K. wrote:
>> On 06.03.2017 00:17, Armin K. wrote:
>>> On 06.03.2017 00:10, Allan McRae wrote:
>>>> On 06/03/17 09:04, Armin K. wrote:
>>>>> On 06.03.2017 00:00, Allan McRae wrote:
>>>>> Entries are alright in .MTREE (correct gid's). I don't suppose pacman
>>>>> does something odd there? Why doesn't it use those uid's/gid's?
>>>>> If you could point me to the part in the pacman code which does the
>>>>> extraction, I might be able to find a solution (at least for myself).
>>>> Extraction is just taking files out of the tarball.  Note that the
>>>> tarball store files with UID/GID numbers and not names.
>>>> A
>>> Oh my. Something else is at play here. Manually extracted tarball
>>> contains wrong permissions, .MTREE file reports correct permissions.
>>> pkg/ directory is sadly only owned by the build user. I suppose
>>> something between package() and the tarball creation (or just
>>> the tarball creation) screws things up. Any ideas what it might be?
>>> libarchive version is 3.3.0.
>>> fakeroot is 1.20.1.
>> This is indeed libarchive/bsdtar problem. The permissions are just fine
>> when extracted in chroot, but not when extracted from outside of it.
>> Looks like behaviour changed, and that tarball stores uid/gid isn't
>> true (anymore). Directory owned by a certain user is owned by the
>> same user in and outside of chroot, besides two of them having different
>> uids/gids.
> This sounds like the expected behavior.  The user/group names are
> stored in the archive if they exist on the system building the package
> and bsdtar will use the names rather than the id's by default when
> extracting the archive.
> apg

I've contacted libarchive devs and they suggested --numeric-owner bsdtar
option. It works just as I expect it to.

More information about the pacman-dev mailing list