[Bug 26423] Wine should use MS-DOS (8.3) file names when interacting with Dosbox

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=26423

--- Comment #3 from Spammer <spammis at spam.la> 2011-08-17 05:26:44 CDT ---
I haven't tried applying any of the patches, but I looked a bit at the source
code. As I see it, Wine will use its short name in Dosbox (e.g. PROG~FBU for
Program Files) while Dosbox will support both Dosbox and Wine short names
(PROGRA~1 and PROG~FBU). This should fix the problem on UNIX partitions (e.g.
ext4) and, until bug 26625 has been solved, also on NTFS partitions. However,
if I've got things right, it won't help on FAT partitions.

As a little example, I created two files on a FAT partition:
echo a > longfilename2
echo '' > longfilename1
You can tell the files apart by looking at the file size: longfilename1 is 1
byte while longfilename2 is 2 bytes (since each echo call ends with a UNIX line
break). Since the partition type is FAT, real short names were created by the
system based on the order of creation and stored on disk. The file
longfilename2 was created first, so it gets ~1 while longfilename1 gets ~2.

"wine cmd /c dir /x" returns:

 8/17/2011  11:56 AM             1  LONGFI~2     longfilename1
 8/17/2011  11:56 AM             2  LONGFI~1     longfilename2

So Wine preserves the real short names. Dosbox, on the other hand, ignores the
real short names and invents its own names. A "dir" call in Dosbox returns the
following:

LONGFI~1                      2 17-08-2011 11:56
LONGFI~2                      1 17-08-2011 11:56

As you can see by comparing file sizes, Wine and Dosbox swap the names of these
files.

I assume that this is a bug in the Wine/Dosbox integration, although maybe not
a very important one. The integration only fails on FAT partitions, and it
doesn't even always happen on those partitions. Sometimes, if you are lucky,
real and Dosbox short names may happen to be the same on a FAT partition.

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