Re: ZwOpenFile and hard disks - C / C++ / MFC Discussion Boards

Re: GetDiskDrive

p_196027-May-09 23:27

p_1960

27-May-09 23:27

But how will i know in which drive my disk is inserted

Re: GetDiskDrive

Jacobb Michael28-May-09 0:06

Jacobb Michael

28-May-09 0:06

Hi Get GetLogicalDrives.

and use the folloing function to find out the drive type

UINT uDriveType = GetDriveType(sDriveLabel)

0 - Unknown drive
1 - Invalid Path
2 - Removable Drive
..etc

Regards
.....Jack

Re: GetDiskDrive

Naveen28-May-09 1:56

Naveen

28-May-09 1:56

Handle WM_DEVICECHANGE message

nave

[OpenedFileFinder] [My Blog]

Re: GetDiskDrive

p_196028-May-09 2:51

p_1960

28-May-09 2:51

If possible can u suggest me any sample regarding the same...

Re: GetDiskDrive

Naveen28-May-09 3:13

Naveen

28-May-09 3:13

See the below sample code in the MSDN Detecting Media Insertion or Removal[^]

nave

[OpenedFileFinder] [My Blog]

ZwOpenFile and hard disks

andrew_dk27-May-09 21:56

andrew_dk

27-May-09 21:56

I had code to access the serial number of a hard drive. I was running this in user mode, getting a handle to the drive as follows:

HANDLE hDrive ;
wchar_t driveName[128];

for(int i = 0; i < 16; ++i)
{
  wsprintf(driveName, L"\\\\.\\PhysicalDrive%d", drive);
  hDrive = CreateFile(driveName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE , NULL, OPEN_EXISTING, 0, NULL);
  ...
}

I'm now trying to do the same thing in a driver. However I'm not sure how to open the actual drive. Currently the code I have is:

HANDLE hDrive;
WCHAR sDriveName[128];
OBJECT_ATTRIBUTES oa;
UNICODE_STRING usDriveName;
IO_STATUS_BLOCK iosb;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
int drive;

for(drive = 0; drive < MAX_IDE_DRIVES; drive++)
{	
  _snwprintf(sDriveName, 128, L"\\Device\\Harddisk%lu", drive);
  RtlInitUnicodeString(&usDriveName, sDriveName);

  InitializeObjectAttributes(&oa, &usDriveName, OBJ_INHERIT, NULL, NULL);

 if(NT_SUCCESS(ZwOpenFile(&hDrive, FILE_ALL_ACCESS, &oa, &iosb, FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_DIRECTORY_FILE)))
  {
    ...
  }
}

However the call to ZwOpenFile is failing with iosb.Status == 3.

Any ideas what I am doing wrong here??
Thanks.

Re: ZwOpenFile and hard disks

David Crow28-May-09 4:24

David Crow

28-May-09 4:24

andrew_dk wrote:
However the call to ZwOpenFile is failing with iosb.Status == 3.

Does that equal STATUS_WAIT_3?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

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Re: ZwOpenFile and hard disks

andrew_dk28-May-09 11:06

andrew_dk

28-May-09 11:06

The return value from the call to ZwOpenFile is STATUS_OBJECT_NAME_NOT_FOUND, so I guess the issue is I have the name wrong. More investigation needed on my part.

CHANGE THE POSITION OF CONTROL OR BUTTON

johnjitu27-May-09 21:54

johnjitu

27-May-09 21:54

Hello everybody

I have to modify a project made in MFC. I was trying to change the position of one Button in the ,i has made changes in file.rc (resource file ) ,but it not works ,it seems to like fix.

Please some body help me

Thanks in advance

Re: CHANGE THE POSITION OF CONTROL OR BUTTON

Chandrasekharan P27-May-09 22:09

Chandrasekharan P

27-May-09 22:09

Is the button visible for you. normally when you change the value in the .rc file the position of the control will change.

Re: CHANGE THE POSITION OF CONTROL OR BUTTON

CPallini27-May-09 22:17

CPallini

27-May-09 22:17

Why don't you use the resource editor for the purpose?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: CHANGE THE POSITION OF CONTROL OR BUTTON

«_Superman_»27-May-09 22:21

«_Superman_»

27-May-09 22:21

Why do you need to modify the .rc file?
Why not use the dialog editor to move the control?

«_Superman_»
I love work. It gives me something to do between weekends.

How to get the Friendly name of the removable drive by the Drive letter ?

Jacobb Michael27-May-09 20:45

Jacobb Michael

27-May-09 20:45

Dear Friends !

Can anyone help me out !

i get friendly name while inserting the device into system. No issue in it.
But i want to get the friendly name of the removable drive by giving the drive letter

for example

if i give G: then it should give the device inserted in G as "Trancend ..."

I hope some once can do in clever !
thanks in advance Sniff | :^)

Regards
.....Jack

Re: How to get the Friendly name of the removable drive by the Drive letter ?

Stuart Dootson27-May-09 22:24

Stuart Dootson

27-May-09 22:24

GetVolumeInformation[^] returns the disk's volume name, which could well be what you want.

Re: How to get the Friendly name of the removable drive by the Drive letter ?

Jacobb Michael27-May-09 23:52

Jacobb Michael

27-May-09 23:52

Thank you for the solution.

but This returns only the volume information.
it teturns the name of the volume not a friendly name of the device.

i checked with the above WINAPI function it just returns the volume name

for example: the device inserted is "Trances 4GB Removable..." but it shows the volume name "Jack"

if i am wrong sorry and i hope when we insert the removable device it mounds with the device partition. that is the reason While we use WM_DEVICE_CHANGE enables to track the device and even to get the friendly name using GUID

But i am very scared how to get the friendly name of the removable drive using the drive name.
i am trying...

thanks...

Regards
.....Jack

Re: How to get the Friendly name of the removable drive by the Drive letter ?

Stuart Dootson28-May-09 1:03

Stuart Dootson

28-May-09 1:03

Bet you can get that using WMI.

I use WMI Explorer[^] to explore what information there is in the WMI database for my system. I just plugged in my flash drive, and it seems to have a 'friendly name' in the Caption property of its Win32_DiskDrive instance.

This VBScript (you can run it from the command-line with cscript filename.vbs) can be used to retrieve that - the C++ equivalent is straightforward, but long-winded.

Set objWMIService = GetObject("winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")
Set drives = objWMIService.ExecQuery("Select * FROM Win32_DiskDrive")
For Each drive in drives
 WScript.StdOut.WriteLine drive.caption
Next

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to get the Friendly name of the removable drive by the Drive letter ?

Jacobb Michael28-May-09 2:30

Jacobb Michael

28-May-09 2:30

Thanks a lot !

My actual requirement towards this issue is this:

I am logging the file activities in Win32 DLL with the following details Create/Copy/Delete/Move details in the USB Drive - done
Along with Removable Drive Friendly Name – doing

I am not much familiar with system side Activities.
I hope we can use the WMI in Win32 dll applications . I will try it out.
And If u have any idea on this help me out.

Thank you.

Re: How to get the Friendly name of the removable drive by the Drive letter ?

Stuart Dootson28-May-09 2:32

Stuart Dootson

28-May-09 2:32

jacob raj wrote:
I hope we can use the WMI in Win32 dll applications .

Yes, you can - it's just a set of COM interfaces and objects, so is callable from C++.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

how can i find file in subFolder?

002comp27-May-09 20:34

002comp

27-May-09 20:34

Hello Friends

I was using findfirstFile to find files in a folder but now i hv to search in subfolder.Do u know any solution or any other function?
Thanks In Advance.

Regards
Yogesh

Re: how can i find file in subFolder?

Nuri Ismail27-May-09 20:59

Nuri Ismail

27-May-09 20:59

See here[^]. Smile | :)

Nuri

Re: how can i find file in subFolder?

«_Superman_»27-May-09 22:16

«_Superman_»

27-May-09 22:16

You need a recursive function to find the files within sub-folders.
Check if the dwFileAttributes is FILE_ATTRIBUTE_DIRECTORY and if it is, pass its name as the root folder and call the same function from within.

The function signature would be something like this.
int RecursiveFind(TCHAR* lpFileName, TCHAR* lpRootFolder);

«_Superman_»
I love work. It gives me something to do between weekends.

Re: how can i find file in subFolder?

002comp27-May-09 23:24

002comp

27-May-09 23:24

FILE_ATTRIBUE_DIRECTORY is there but i m not getting,
Here is the scenario:

char defaultPath[256]="C:\\Program Files\\sample\\";
char filename[256]="abc.max";

WIN32_FIND_DATA FindData;
HANDLE hFind;
hFind = FindFirstFile( filename, &FindData );

m i using like this.But i m not getting.

Re: how can i find file in subFolder?

Hamid_RT27-May-09 23:25

Hamid_RT

27-May-09 23:25

You can use of FindFirstFile/FindNextFile in a loop.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: how can i find file in subFolder?

Michael Schubert28-May-09 0:54

Michael Schubert

28-May-09 0:54

With MFC, use something like this:

void EnumFilesRecursive()
{
  CFileFind ff;
  BOOL bWorking = ff.FindFile("d:\\*.*");

  while (bWorking == TRUE)
  {
    bWorking = ff.FindNextFile();
    if (ff.IsDirectory())
    {
      if (ff.IsDots())
        continue;
      
      EnumFilesRecursive(ff.GetFilePath());
    }
    else
    {
      //call "ff.GetFilePath()" to get the file names
    }
  }

  return;
}

delete( )

vital_parsley200027-May-09 20:18

vital_parsley2000

27-May-09 20:18

Using ADO ,records could be deleted using Delete(adAffectCurrent) or SQL queries.
Which one is more feasible and faster to process ? Blush | :O

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