[PATCH] Add user/group support to brackup

Kostas Chatzikokolakis kostas at chatzi.org
Fri May 28 17:02:41 UTC 2010

On 28/05/10 17:39, Gavin Carr wrote:
> Brackup currently lacks support for recording and restoring ownership.
> The attached patches add this functionality, in a similar way to how 
> modes are stored in the metafile currently. The first patch updates 
> Brackup::File and Brackup::Backup to capture user and group ownership
> for all objects in the metafile; the second patch updates 
> Brackup::Restore to reapply (where possible) the recorded user/group
> settings.

Hi Gavin,

That's a nice and needed feature!

Just one comment: from a quick look at the patch I see that you store
names, not ids. It would be nice if brackup could also record the
uid/gid, like tar. Note that a file might have a uid without name in the
original system, or the name might not exist in the restore system.

A good solution would be to store ids (which are shorter) for each file
and also store the id -> name map in the metafile. Then, on restore, we
can apply the local uid for that name, unless it doesn't exist (or some
--numeric-owner option is given) in which case we can restore the
original uid (this is how tar works).


PS. if a uid has no name then getpwuid returns undef, which might cause
some warnings in as_rfc822()

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