samba - Feb 2006 - Deleting undeletable files gives no error

I have an odd problem that involves clients deleting files they should
not be able to delete, and claiming success, but then the files "come
back" again.

Here's the setup: I have a filesystem that contains a file
"foobar.txt" owned by user "test", group "test". 
Permissions on this
file are 644, permissions on the enclosing directory are 777.

I share this filesystem via samba (version 3.0.20), using this config:

[test]
   path=/mnt/test
   writable = yes
   browsable = yes
   hide dot files = yes
   wide links = no
   delete readonly = yes
   guest ok = yes
   guest only = yes
   force create mode = 400
   force directory mode = 700
   force user = test
   force group = test

I mount this share on an XP box.  I delete foobar.txt.  It works and
all is well.

Then I do the same exact test except mount /mnt/test readonly.  Now,
when I delete foobar.txt, it seems to work, but refreshing the XP
window or doing "dir" again shows the file wan't actually deleted.
Obviously you can't delete a file off of a readonly filesystem, but
(and here's the problem) shouldn't there have been an error message
given?  The delete failed, but the user wasn't informed.

David

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David Shaw wrote:
> Then I do the same exact test except mount /mnt/test readonly.  Now,
> when I delete foobar.txt, it seems to work, but refreshing the XP
> window or doing "dir" again shows the file wan't actually
deleted.
> Obviously you can't delete a file off of a readonly filesystem, but
> (and here's the problem) shouldn't there have been an error message
> given?  The delete failed, but the user wasn't informed.
This is by design.

The internal checks for deleting a file (needed for delete-on-close
semantics) only look at the file system permissions.  Maybe Jeremy
has an idea but if you mount a filesystem ro, I would say just mark the
share with (read only = yes).  I don't see a need to add any other changes.




cheers, jerry

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