On Thu, May 14, 2009 at 05:14:02PM +0200, Kern Sibbald wrote: > On Thursday 14 May 2009 14:07:47 Dan Langille wrote: > > I was contacted off-list last night regarding systems where the GID/UID > > of the backed up file does not exist when restoring. > > > > The backup was performed on a system that contained GID/UID entries that > > did not exist on the new server. The user reported an issue involving > > unexpected chown settings on the restored file set. Specifically, many > > files were chown root:wheel where he expected them to be something from > > the missing GID/UID values. He has since solved this issue by adding > > the missing values to the system and performing the restore again. > > > > I have not looked at the code. But I see the above characteristics as > > the best result. > > > > My thoughts indicate we have two options in this situation: > > > > 1 - store GID/UID numeric values, but if those numbers mapped to a > > different group/user on restore, that's bad, Very bad. > > We do the above. > > I think this is documented in the manual to possibly create problems if you > move files from one system to another. > > It is worse if you move it from one OS type to a totally different one as all > the bits in the mode word of the stat packet are not guaranteed to be the > same and that *could* possibly create some problems for certain file types. > > > > > > 2 - store GID/UID names, so we Do The Right Thing(tm) when restoring. > > If the GID/UID is not found, use root defaults (in this case, root:wheel). > > > > From the scenario described, I think we do option 2 at present. > > No, we do not save names. > > I think we do the same thing that tar and most other program do -- simply > create the file with the original UID/GID. > > If tar does something different, I would like to know what they do. >
tar has "--numeric-owner" option to restore using numeric UIDs/GIDs.. the description for that option is "always use numbers for user/group names". I _think_ the default for tar is to restore by using owner/group names.. -- Pasi ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Bacula-devel mailing list Bacula-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-devel
