dale at 4drealtime.co.za
Fri Feb 8 05:58:45 GMT 2008
Hi Matt >@2008.02.07_21:39:08_+0200
> On Thu, 2008-02-07 at 14:46 +0200, Dale Whitfield wrote:
> > I would like to avoid the following situation:
> > SRC has:
> > -rwxr-xr-x 1 root staff 1596328 2005-04-29 17:34 libc-2.3.3.so
> > -rw-r--r-- 1 root staff 193 2005-04-29 17:34 libc.so
> > lrwxrwxrwx 1 root staff 13 2007-02-05 15:06 libc.so.6 -> libc-2.3.3.so
> > DEST has:
> > -rwxr-xr-x 1 dale dale 1558836 2008-02-07 12:25 libc-2.3.6.so
> > -rw-r--r-- 1 dale dale 193 2008-02-07 11:46 libc.so
> > lrwxrwxrwx 1 dale dale 13 2008-02-07 11:42 libc.so.6 -> libc-2.3.6.so
> > If I run:
> > rsync --ignore-existing -avn SRC DEST
> > output shows the following is to be written to DEST
> > libc-2.3.3.so
> > libc.so.6 -> libc-2.3.3.so
> > How do I avoid libc.so.6 being over-written to point to an old lib?
> It looks like --ignore-existing is currently implemented to apply only
> to regular files. I think it was intended to apply to all
> non-directories; certainly that is necessary if it is to prevent
> undesired tweaking when a --link-dest run is restarted after an
> interruption. I will write a patch to make --ignore-existing apply to
> all non-directories after I look into some other weirdness I just
> noticed with --ignore-non-existing.
> Two approaches you might try in the meantime:
> 1. Exclude the problematic symlinks, by hand if there are only a few or
> otherwise with a script that scans the destination and generates an
> --exclude-from file.
> 2. If both source and destination are local, run "rsync <options> DEST
> SRC DEST", i.e., give the destination as an initial source argument.
> When rsync unduplicates the file-list, existing destination files will
> take priority over source files. (Attributes on source directories
> won't be propagated because the destination attributes will override
> them; if you want to propagate the attributes, you could use an extra
> run with --include='*/' --exclude='*'.)
Excellent. Option 2 worked since SRC and DEST are local.
However, its not intuitive or obvious. As you suggest, --ignore-existing
should apply to all non-directories. The side-effect of over-writing a
symlink, as in my case above, is clearly not desirable.
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