mountmgr.sys: Write usable device paths into HKLM\SYSTEM\MountedDevices.

[Bernhard Übelacker]

Hello,
I got asked if I could get a discussion started for the attached
patch and bug #38235 [1].

This bug is about Blindwrite 7 not showing any usable
source DVD drive.

It seems Blindwrite relies on the values stored in
HKLM\SYSTEM\MountedDevices to enumerate drives.

Wine currently stores in e.g. "\DosDevices\D:" the linux mount
point of the drive as ansi string.

A native Windows XP stores there (as wide string):
\??\IDE#CdRomVBOX_CD-ROM_____________________________1.0_____#42562d3231303037333036372020202020202020#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b}

This patch stores now as content just the device (also as wide string):
\\.\d:

This is sufficient to make Blindwrite 7 happy.


- Is there currently any use of the stored linux mount point anywhere?

- Is there a test needed and where should that be placed
  as mountmgr.sys has currently no tests subdirectory?

- Is there a reason known why this short device name should not
  be used in this situation?


Kind regards,
Bernhard


[1] https://bugs.winehq.org/show_bug.cgi?id=38235