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SubjectRe: hardlinks.... sucks... ;-(
On Wed, Jan 07, 1998 at 01:21:58AM -0500, Albert D. Cahalan wrote:

> >> No. You just need other tool than chown, you need tool that changes
> >> uid->uid. And you run it as chown -from olduser -to newuser -R /,
> >> which looks for all files owned by olduser and makes newuser own
> >> them. Just go ahead and write this tool. (And mail me a copy ;-). (I
> >> would also appredicate option to delete such files).
> >
> > Try something a bit like one of the following:
> >
> > find / -user 1234 -print | xargs chown 4321
> > find / -user 1234 -print | xargs rm
> > find / -user 1234 -exec chown 4321 {} ;
> > find / -user 1234 -exec rm {} ;
>
> Alright now, how many people would do that? :-)
>
> 1. the file is found by "find"
> 2. the user removes it and makes a link
> 3. the "chown" command runs
>
> It seems a file starting with "-" could cause trouble too.
> Maybe a name like "--follow-symlinks" would be interesting.

So then try:

find / -user 1234 -print0 | xargs -0 chown 4321 --
find / -user 1234 -print0 | xargs -0 rm --
Which will also protect you against filenames with spaces and other fun
characters.

> Link and symlink restrictions would help protect us from
> our luserness. Arrogance has no place in security.

Some believe that not even larting will prevent us from luserness ;-)

Ralf

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