Re: [rdiff-backup-users] User/Group Permissions Question - IS THIS A BUG?

[Chris Wilson]

Hi Francisco,

On Wed, 25 Feb 2009, Francisco M. Marzoa Alonso wrote:

> Chris Wilson escribió:
> > You need to use --preserve-numerical-ids on the restore command to
> > restore with the correct ownership.
> That does not work neither:
>
> address@hidden:~$ ls -la test
> total 8
> drwxr-xr-x  2 fmmarzoa fmmarzoa 4096 2009-02-23 20:07 .
> drwxr-xr-x 78 fmmarzoa fmmarzoa 4096 2009-02-25 09:54 ..
> -rw-r--r--  1 fmmarzoa devel       0 2009-02-23 20:07 testfile
> address@hidden:~$ rdiff-backup --preserve-numerical-ids test test_backup
> address@hidden:~$ ls -la test_backup
> total 12
> drwxr-xr-x  3 fmmarzoa fmmarzoa 4096 2009-02-23 20:07 .
> drwxr-xr-x 79 fmmarzoa fmmarzoa 4096 2009-02-25 09:56 ..
> drwx------  3 fmmarzoa fmmarzoa 4096 2009-02-25 09:56 rdiff-backup-data
> -rw-r--r--  1 fmmarzoa fmmarzoa    0 2009-02-23 20:07 testfile
> address@hidden:~$ rm -Rf test
> address@hidden:~$ rdiff-backup -r now --preserve-numerical-ids
> test_backup test
> address@hidden:~$ ls -al test
> total 8
> drwxr-xr-x  2 fmmarzoa fmmarzoa 4096 2009-02-23 20:07 .
> drwxr-xr-x 79 fmmarzoa fmmarzoa 4096 2009-02-25 09:57 ..
> -rw-r--r--  1 fmmarzoa fmmarzoa    0 2009-02-23 20:07 testfile
> address@hidden:~$
>
> :-(

As Damon Timm pointed out, preserving any kind of ownership does not work 
when you run the restore as a non-root user. Unix does not allow non-root 
users (including rdiff-backup when run on your behalf) to change the owner 
of files. They will always be owned by the user that you are running as. 
If you run the restore as root, then ownership should be preserved either 
by name or by UID.

Cheers, Chris.
--
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\  __/ / ,__(_)_  | Chris Wilson <0000 at qwirx.com> - Cambs UK |
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