Feature Request: Options to limit --one-file-system at the source or destination.

Hans Deragon hans at deragon.biz
Tue Jan 15 21:38:22 GMT 2008

Matt McCutchen wrote:
> On Tue, 2008-01-15 at 13:21 -0500, Hans Deragon wrote:
>>   Currently, the --one-file-system applies to both the source and
>>   destination and this is a problem.
>>   In my source, I have a symlink pointing to a directory on another
>>   device which I would like to have copied.  I thus use
>>   --copy-unsafe-links.
>>   I also use --delete.  This is dangerous because if there is a bug in
>>   my script, I would not like the destination to become suddenly / and
>>   deletion occurs on mounted network drives (granted, the machine would
>>   be toast, but the damage would be limited to the machine; not the
>>   corporate network).
>>   If I make use of --one-file-system, the symlink at the source gets
>>   ignored.  So I need a --one-file-system option that applies only to
>>   the destination, probably named something like
>>   --one-file-system-at-destination.
>>   Could that be easily implemented?  The following two options would be
>>   nice:
>>   --one-file-system-at-source
>>     # Limit to one file system at the source.
>>   --one-file-system-at-destination
>>     # Limit to one file system at the destination.
> This is a good feature request and would be easy to implement.
> However, if the source contains only a small, fixed set of
> cross-filesystem symlinks that you want to follow, a quicker solution
> would be to use --relative and provide for each such symlink an
> additional source argument that reaches through it, starting a new
> --one-file-system traversal at its target.  This approach also avoids
> the need for --copy-unsafe-links.  For example, if you want to copy
> ~/src to ~/dest and have rsync follow a symlink ~/src/extrafiles
> -> /tmp/extrafiles to obtain additional source files, you would run:
> rsync -r --relative --one-file-system \
> 	~/src/./ ~/src/./extrafiles/ ~/dest/
> Another approach is to use protect filters instead of --one-file-system
> as a precaution against undesired deletions.
> Matt

Greetings Matt.

  Mmm.  None of the solutions you presented to me would be satisfying.
For the moment, a got ride of the symlinks at the source by recopying
the files from the other device (have a script to update them).  Not
ideal, but it does the job.

Thank you for the quick response.
Hans Deragon
Consultant en informatique/Software Consultant
Deragon Informatique inc.
http://www.deragon.biz        Open source (contribution):
mailto://hans@deragon.biz     http://autopoweroff.sourceforge.net

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