Re: How to convert "\Device\HarddiskVolume1\" to "C:\"

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Arkady,

Sure, but that not suit all his his purposes as OP wrote from beginning

I just avoided mentioning QueryDosDevice() simply because the OP made
that clear that it supposedly does not work for him. Instead, I
proposed him a solution with ZwOpenSymbolicLinkObject() -
ZwQuerySymbolicLinkObject() pair , and he seems to be happy with it.
The funny part here is that
ZwOpenSymbolicLinkObject()-ZwQuerySymbolicLinkObject() pair, is, in
actuality, nothing more that just QueryDosDevice()'s internal
implementation - he is going to achieve *EXACTLY* the same results with
QueryDosDevice().....



Anton Bassov



Arkady Frenkel wrote:
Sure, but that not suit all his his purposes as OP wrote from beginning
Arkady

"Doron Holan [MS]" <doronh@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:ez4n3rIMHHA.5016@xxxxxxxxxxxxxxxxxxxxxxx
in user mode you can just use QueryDosDevice to get the mapping without
using undocumented user mode APIs.

d

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"Arkady Frenkel" <arkadyf@xxxxxxxxxxxxxxxx> wrote in message
news:ur0tK99LHHA.1252@xxxxxxxxxxxxxxxxxxxxxxx
You can use ZwQueryDirectoryObject() for "GLOBAL??" too.
You can see the results in WinObj.exe from sysinternals.com
Arkady

"Mario Beutler" <mario.beutler@xxxxxxxxxx> wrote in message
news:1167897103.865952.302420@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Anton, thank you for your clear answer!

Mario

anton bassov wrote:
If you need a generic solution that works in both kernel and user mode,
the whole things can be done like ZwOpenSymbolicLink() -
ZwQuerySymbolicLink() sequence for each drive letter (A;B;C;D,etc. If
the target volume is mounted on a partition of a basic disk, you will
get a string in the form "\Device\HarddiskVolumeX\...". If the target
volume is mounted on a partition of a removable USB disk, you will get
a string in the form "\Device\HarddiskX\DP(1)0-0+b\..." If the target
volume is a network drive, you will get a string in the form
"\Device\LanmanRedirector\ServerX\...". ). In other words, you have no
chance to miss your target string.


If you want a solution that works only in the kernel mode, you can
check IoVolumeDeviceToDosName() (or RtlVolumeDeviceToDosName(), if you
want your code to run on W2K as well ) documentation on MSDN....


Anton Bassov

Mario Beutler wrote:
Hello,

How to convert the following full file names into "normal" file
names:
\Device\HarddiskVolume1\windows\system32\lsass.exe
\Device\Harddisk5\DP(1)0-0+b\test.exe
\Device\LanmanRedirector\Server007\TEMP\test.exe

I need the "normal" file names like:
C:\windows\system32\lsass.exe
J:\test.exe (<-This is a USB drive.)
\\Server007\TEMP\test.exe

I tried GetVolumePathNamesForVolumeName,
GetVolumeNameForVolumeMountPoint, GetFullPathName and
QueryDosDevice -
but nothing seems to work for all cases (e.g. USB, network shares).
Any ideas? Thanks.

Mario






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