[Bug 10957] CreateFile doesn't work for devices

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=10957





--- Comment #16 from Robert Millan <rmh at aybabtu.com>  2007-12-31 03:32:08 ---
(In reply to comment #15)
> You can't delete a file and hope something else pick it up. For everything it's
> gone. So I doubt your "solution" is a a good one. Just don't remove the image
> file. Of course you are welcome to send your patch to wine-patches and see what
> happens.

The underlying loopback interface is based on i-nodes, not files.  A file is
just a way to refer it to the i-node that corresponds to your data.  For this
reason after the file has been renamed (and not necessarily "deleted" as such),
you may still access its content via /dev/loop0.

You may argue that this is in fact a bug and /etc/mtab should be updated
automatically, but solving that is impossible because the design of this scheme
relies on subsequent invocations of mount for any update of that file.  Of
course this wouldn't happen if /etc/mtab was a symlink to /proc/mounts, but
then we wouldn't have to worry about loopbacks at all.

You may also argue that users who rename images after setting loopbacks on them
actually deserve this result because they made a mistake.  I disagree.  I think
programs should be smarter than users and try to respond reasonably to their
mistakes whenever this makes sense and doesn't compromise other areas. 
Programs are there to serve the user, not the other way around.


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