[Bug 29426] UDF support: VOLUME_GetSuperblockSerial invalid for some volume types

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=29426

--- Comment #5 from Alex <cerebro.alexiel at gmail.com> 2011-12-24 04:38:39 CST ---
(In reply to comment #1)
> Could you point to spec describing which blocks the volume serial number is
> located?

I'm the author of the patch "kernel32: Add UDF support"
(http://source.winehq.org/git/wine.git/commitdiff/73f4e23938142225efdc233f9db56334ce8e326f)

I read the spec and the volume serial is not part of it.
In fact, Windows uses its own algorithm depending on the filesystem of the
volume.

See
http://social.msdn.microsoft.com/Forums/en-US/windowsopticalplatform/thread/2094f4c1-5681-429a-8b36-36c26d702726
Quoting the author : "This serial number is NOT part of the file system on the
disc and is NOT located on the source disc AT ALL.  It is entirely generated by
Windows."

See also the code used by wine :
http://source.winehq.org/git/wine.git/blob/HEAD:/dlls/kernel32/volume.c#l569

To find which sector was used by Microsoft :
- I made an ISO of my Sims3 DVD (a retailer/genuine one)
- I got the serial of it from a (VirtualBox'ed and genuine) XP by mounting the
ISO file
- I simply wrote a for loop and found it was the 257th sector with bytes
reversed

Note that it was the only UDF DVD I had (and still have).

If you found that this sector depends on the UDF revision, the code must be
changed.

Either you feel ready to write a patch (I can review it if you want) or not and
in this case, I can write it for you.

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