On Wednesday 29 June 2005 13:40, Russell Howe wrote:
> Kern Sibbald wrote:
> > On Wednesday 29 June 2005 11:47, Russell Howe wrote:
> >>Kern, find(1) can output null-terminated strings, which may help when
> >>there are files with weird names. Would it be possible for bacula to
> >>somehow support this format of output? I guess it may be useful...
> >
> > Sorry, but I'm not sure about what you would like supported. Could you be
> > more specific, perhaps with an example?
>
> If you do File = "|foo"
>
> The bacula expects the command 'foo' to produce a list of files,
> separated by newlines, according to the docs.
>
> GNU find (not sure about others) has a -print0 option, which produces a
> \0-separated list of files. This is typically used with xargs' -0 option.
>
> Since it's possible to create files with a \n in the filename (at least
> on my XFS and NFS-mounted ext3 filesystems here), doesn't this open up
> the possibility for bacula to get rather confused?
>
> On the other hand, creating a file with a \0 in its name is pretty
> difficult (if not impossible - filenames are null-terminated, no?).
>
> So, from what I can see, someone with permission to create or rename
> files can really confuse bacula about which files to back up.
>
> I don't think filenames with \n's in them are really a problem, as you'd
> end up with a situation something like this
>
> /tmp/foo\nbar
>
> would give
>
> /tmp/foo
> bar
>
> and I guess bacula wouldn't like the non-absolute path 'bar'.
>
> But a directory, e.g.
>
> /tmp/foo\n/proc
>
> would cause bacula to back up /tmp/foo and /proc, no?
>
> It's a corner case, admittedly, but could it not be a potential DoS? A
> user could make bacula back up something big and fill the storage device.
OK, I see what you mean.
I guess my reaction is that if someone really wants \n s in their filenames
(i.e. is crazy enough), then I prefer that they write their own little script
that encloses the names in quotes then Bacula should handle them fine.
--
Best regards,
Kern
(">
/\
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