[Bug 16592] Ford service manual viewer fails to detect CD (fix attached)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=16592





--- Comment #14 from G. Paul Ziemba <p-wine-bugs at ziemba.us>  2009-01-17 01:08:17 ---
Created an attachment (id=18747)
 --> (http://bugs.winehq.org/attachment.cgi?id=18747)
debug log

Here is the output with WINEDEBUG set to "volume,file" from wine-1.1.10 without
my change to GetVolumeInformationW(). (I don't think anything related to this
issue has changed between 1.1.10 and 1.1.12, but can rebuild 1.1.12 and rerun
if necessary).

~/.wine/dosdevices is set up like this:

42:paul at hairball% lls ~/.wine/dosdevices/
total 4
2 drwxr-xr-x  2 paul  sw  512 Dec 24 22:49 ./
2 drwxr-xr-x  4 paul  sw  512 Jan 16 22:42 ../
0 lrwxr-xr-x  1 paul  sw   10 Dec 16 08:23 c:@ -> ../drive_c
0 lrwxr-xr-x  1 paul  sw   10 Dec 16 09:34 com1@ -> /dev/cuad0
0 lrwxr-xr-x  1 paul  sw   10 Dec 16 08:36 com3@ -> /dev/cuau0
0 lrwxr-xr-x  1 paul  sw   13 Dec 21 21:44 d:@ -> /mnt/93-truck
0 lrwxr-xr-x  1 paul  sw    8 Dec 21 21:57 d::@ -> /dev/md1
0 lrwxr-xr-x  1 paul  sw    6 Dec 24 22:48 e:@ -> /cdrom
0 lrwxr-xr-x  1 paul  sw    8 Dec 24 22:48 e::@ -> /dev/cd0
0 lrwxr-xr-x  1 paul  sw    1 Dec 16 08:23 z:@ -> /

The "D" drive is a (virtual) CDROM drive (results are the same with a real
CDROM drive).

What's going on is that the application is looking for its CD in any
"REMOVABLE" drive. If you grep for GetVolumeInformationW in the debug trace,
you will see the failed attempt to look up information about D:.

When I was debugging this problem initially, I added some printfs to
GetVolumeInformationW and found that the else clause of the first test in that
function was copying the backslash from root[0] to device[4].

I had not turned on "file" tracing in my earlier debugging, but I now notice
that before the call to GetVolumeInformationW there seems to be some attempt to
create a file L"\\\\.\\\\:". I don't understand the significance of this
attempt - I expect it would fail on Windows because the CDROM is readonly, but
maybe there is some strange magic going on. I don't have experience with the
Windows API so maybe it's some idiom familar to Win programmers.


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