Multiple partition/VolumeID on removable storage (SetupDiGetClassDevs)
- From: posting.gregoire@xxxxxxxxx
- Date: 25 Feb 2006 12:35:41 -0800
Hello,
I'm trying to list all volumeIDs of a removable storage which has two
partitions. In the Disk Management interface, Windows limits to 1 the
number of partition that you can mount from a removable storage. I'm
trying to programmatically get the volume ID of this second partition
and mount it. I use the piece of code below which works great but list
only the first partition of the removable device.
Questions:
- Is the VolumeID of the second partition created somewhere but it's
"simply" not listed or isn't it created at all (which would be bad)?
- If it exists, how to get the VolumeID of the second partition and
then mount it?
- If it doesn't exist, how to create it? Or How to modify the storage
type from "removable" to "basic"?
Gregoire
#define BUFFER_SIZE 10240
struct tagDrives
{
WCHAR letter;
WCHAR volume[BUFFER_SIZE];
} g_drives[26];
int g_count = 0;
BOOL GetAllRemovableDisks()
{
WCHAR caDrive[4];
WCHAR volume[BUFFER_SIZE];
int nLoopIndex;
DWORD dwDriveMask;
caDrive[0] = 'A';
caDrive[1] = ':';
caDrive[2] = '\\';
caDrive[3] = 0;
g_count = 0;
// Get all drives in the system.
dwDriveMask = GetLogicalDrives();
if(dwDriveMask == 0)
{
// WRITELOG("Error - GetLogicalDrives failed\n");
return FALSE;
}
// Loop for all drives (MAX_DRIVES = 26)
for(nLoopIndex = 0; nLoopIndex< 26; nLoopIndex++)
{
// if a drive is present,
if(dwDriveMask & 1)
{
caDrive[0] = 'A' + nLoopIndex;
// If a drive is removable
//if(GetDriveType(caDrive) == DRIVE_REMOVABLE)
{
//Get its volume info and store it in the global variable.
if(GetVolumeNameForVolumeMountPoint(caDrive, volume, BUFFER_SIZE))
{
g_drives[g_count].letter = caDrive[0];
wcscpy(g_drives[g_count].volume, volume);
g_count ++;
}
}
}
dwDriveMask >>= 1;
}
// success if atleast one removable drive is found.
if(g_count == 0)
{
return FALSE;
}
else
{
return TRUE;
}
}
WCHAR GetSpecificDrive(
LPTSTR lpDevID)
{
HDEVINFO hDevInfo;
GUID guid;
BYTE buffer[BUFFER_SIZE];
DWORD dwRequiredSize ;
WCHAR buf[BUFFER_SIZE];
DEVINST devInstParent;
DWORD dwIndex;
WCHAR volume[BUFFER_SIZE];
int nLength,nLoopIndex;
SP_DEVICE_INTERFACE_DATA devInterfaceData;
SP_DEVINFO_DATA devInfoData;
PSP_DEVICE_INTERFACE_DETAIL_DATA pDevDetail;
//if(!lpDevID)
//{
// return 0;
//}
// GUID_DEVINTERFACE_VOLUME is interface Guid for Volume class
devices.
guid = GUID_DEVINTERFACE_VOLUME;
// Get device Information handle for Volume interface
hDevInfo = SetupDiGetClassDevs(&guid, NULL, NULL,
DIGCF_DEVICEINTERFACE |
DIGCF_PRESENT);
if(hDevInfo == INVALID_HANDLE_VALUE)
{
// WRITELOG("Error - SetupDiGetClassDevs failed\n");
return 0;
}
// Loop until device interfaces are found.
for(dwIndex = 0; ;dwIndex ++)
{
ZeroMemory(&devInterfaceData, sizeof(devInterfaceData));
devInterfaceData.cbSize = sizeof(devInterfaceData);
// Get device Interface data.
if(!SetupDiEnumDeviceInterfaces(hDevInfo, NULL,
&guid,dwIndex,&devInterfaceData))
{
break;
}
ZeroMemory(&devInfoData, sizeof(devInfoData));
devInfoData.cbSize = sizeof(devInfoData);
pDevDetail = (PSP_DEVICE_INTERFACE_DETAIL_DATA)buffer;
pDevDetail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
// Get device interface detail data to get
// Device Instance from SP_DEVINFO_DATA and
// Device Path from SP_DEVICE_INTERFACE_DETAIL_DATA
SetupDiGetDeviceInterfaceDetail(hDevInfo,
&devInterfaceData,
pDevDetail, // SP_DEVICE_INTERFACE_DETAIL_DATA
BUFFER_SIZE,
&dwRequiredSize,
&devInfoData); // SP_DEVINFO_DATA
// Get the device instance of parent. This points to USBSTOR.
CM_Get_Parent(&devInstParent,devInfoData.DevInst, 0);
// Get the device instance of grand parent. This points to USB root.
CM_Get_Parent(&devInstParent,devInstParent, 0);
// Get the device ID of the USB root.
CM_Get_Device_ID(devInstParent, buf, BUFFER_SIZE,0);
// If USB root device matches with the input device ID, it is the
target
//device.
// if( buf != NULL && wcscmp(lpDevID,buf) == 0)
{
// Append \ to the DevicePath of SP_DEVICE_INTERFACE_DETAIL_DATA
nLength = wcslen(pDevDetail->DevicePath);
pDevDetail->DevicePath[nLength] = '\\';
pDevDetail->DevicePath[nLength+1] = 0;
MessageBox(0,buf, pDevDetail->DevicePath, 0);
// Get Volume mount point for the device path.
if(GetVolumeNameForVolumeMountPoint(pDevDetail->DevicePath, volume,
BUFFER_SIZE))
{
MessageBox(0,volume, L"VolumeID", 0);
for(nLoopIndex=0; nLoopIndex< g_count; nLoopIndex++)
{
// Compare volume mount point with the one stored earlier.
// If both match, return the corresponding drive letter.
if(wcscmp(g_drives[nLoopIndex].volume, volume)==0)
{
WCHAR pszdrive[5];
pszdrive[0]=g_drives[nLoopIndex].letter;
pszdrive[1]='\0';
MessageBox( 0, pszdrive,L"Drive",0);
// SetupDiDestroyDeviceInfoList(hDevInfo);
// return g_drives[nLoopIndex].letter;
}
}
}
}
}
SetupDiDestroyDeviceInfoList(hDevInfo);
// WRITELOG("Error - No drives found in GetSpecificDrives\n");
return 0;
}
.
- Follow-Ups:
- Prev by Date: Re: Logon broker
- Next by Date: Need To Prevent Screen Capture On MY PC
- Previous by thread: WH_MOUSE_LL not working (WH_MOUSE does)
- Next by thread: Re: Multiple partition/VolumeID on removable storage (SetupDiGetClassDevs)
- Index(es):
Relevant Pages
|
Loading
