给你一段代码,不知道有没有用:
size_t szDriveString = GetLogicalDriveStrings( 0, NULL );
char * pDriveString = new char[szDriveString];
GetLogicalDriveStrings( szDriveString, pDriveString );
size_t szOffset = 0;
while( szOffset < szDriveString - 1 )
{
size_t szStringLen = strlen( pDriveString + szOffset );
char * pString = new char[szStringLen + 1];
strncpy( pString, pDriveString + szOffset, szStringLen + 1 );
szOffset += szStringLen + 1;
cout << pString << '\t';
UINT nType = GetDriveType( pString ); switch( nType )
{
case DRIVE_UNKNOWN:
cout << "DRIVE_UNKNOWN\n";
break;
case DRIVE_NO_ROOT_DIR:
cout << "DRIVE_NO_ROOT_DIR\n";
break;
case DRIVE_REMOVABLE:
cout << "DRIVE_REMOVABLE\n";
break;
case DRIVE_FIXED:
cout << "DRIVE_FIXED\n";
break;
case DRIVE_REMOTE:
cout << "DRIVE_REMOTE\n";
break;
case DRIVE_CDROM:
cout << "DRIVE_CDROM\n";
break;
case DRIVE_RAMDISK:
cout << "DRIVE_RAMDISK\n";
break;
default:
cout << "ERROR!\n";
} char lpVolumeNameBuffer[MAX_PATH];
DWORD dwVolumeSerialNumber;
DWORD dwMaximumComponentLength;
DWORD dwFileSystemFlag;
char lpFileSystemNameBuffer[MAX_PATH];
if( GetVolumeInformation( pString, lpVolumeNameBuffer, MAX_PATH, &dwVolumeSerialNumber, &dwMaximumComponentLength, &dwFileSystemFlag, lpFileSystemNameBuffer, MAX_PATH ) )
{
cout << "\tVolumeName: " << lpVolumeNameBuffer << endl;
cout << "\tVolumeSerialNumber: " << dwVolumeSerialNumber << endl;
cout << "\tMaximumComponentLength: " << dwMaximumComponentLength << endl;
cout << "\tFileSystemName: " << lpFileSystemNameBuffer <<endl; DWORD dwSectorsPerCluster;
DWORD dwBytesPerSector;
DWORD dwNumberOfFreeClusters;
DWORD dwTotalNumberOfClusters;
GetDiskFreeSpace( pString, &dwSectorsPerCluster, &dwBytesPerSector, &dwNumberOfFreeClusters, &dwTotalNumberOfClusters );
cout << "\tSectors Per Cluster: " << dwSectorsPerCluster << endl;
cout << "\tBytes Per Sector: " << dwBytesPerSector << endl;
double dTotalSize = dwTotalNumberOfClusters / 1024.0 / 1024.0 / 1024.0 * dwSectorsPerCluster * dwBytesPerSector;
double dFreeSize = dwNumberOfFreeClusters / 1024.0 / 1024.0 / 1024.0 * dwSectorsPerCluster * dwBytesPerSector;
cout.precision(4);
cout << "\tTotal size: " << dTotalSize << "GB\n";
cout << "\tFree size: " << dFreeSize << "GB\n";
} delete[] pString;
}
delete[] pDriveString;
size_t szDriveString = GetLogicalDriveStrings( 0, NULL );
char * pDriveString = new char[szDriveString];
GetLogicalDriveStrings( szDriveString, pDriveString );
size_t szOffset = 0;
while( szOffset < szDriveString - 1 )
{
size_t szStringLen = strlen( pDriveString + szOffset );
char * pString = new char[szStringLen + 1];
strncpy( pString, pDriveString + szOffset, szStringLen + 1 );
szOffset += szStringLen + 1;
cout << pString << '\t';
UINT nType = GetDriveType( pString ); switch( nType )
{
case DRIVE_UNKNOWN:
cout << "DRIVE_UNKNOWN\n";
break;
case DRIVE_NO_ROOT_DIR:
cout << "DRIVE_NO_ROOT_DIR\n";
break;
case DRIVE_REMOVABLE:
cout << "DRIVE_REMOVABLE\n";
break;
case DRIVE_FIXED:
cout << "DRIVE_FIXED\n";
break;
case DRIVE_REMOTE:
cout << "DRIVE_REMOTE\n";
break;
case DRIVE_CDROM:
cout << "DRIVE_CDROM\n";
break;
case DRIVE_RAMDISK:
cout << "DRIVE_RAMDISK\n";
break;
default:
cout << "ERROR!\n";
} char lpVolumeNameBuffer[MAX_PATH];
DWORD dwVolumeSerialNumber;
DWORD dwMaximumComponentLength;
DWORD dwFileSystemFlag;
char lpFileSystemNameBuffer[MAX_PATH];
if( GetVolumeInformation( pString, lpVolumeNameBuffer, MAX_PATH, &dwVolumeSerialNumber, &dwMaximumComponentLength, &dwFileSystemFlag, lpFileSystemNameBuffer, MAX_PATH ) )
{
cout << "\tVolumeName: " << lpVolumeNameBuffer << endl;
cout << "\tVolumeSerialNumber: " << dwVolumeSerialNumber << endl;
cout << "\tMaximumComponentLength: " << dwMaximumComponentLength << endl;
cout << "\tFileSystemName: " << lpFileSystemNameBuffer <<endl; DWORD dwSectorsPerCluster;
DWORD dwBytesPerSector;
DWORD dwNumberOfFreeClusters;
DWORD dwTotalNumberOfClusters;
GetDiskFreeSpace( pString, &dwSectorsPerCluster, &dwBytesPerSector, &dwNumberOfFreeClusters, &dwTotalNumberOfClusters );
cout << "\tSectors Per Cluster: " << dwSectorsPerCluster << endl;
cout << "\tBytes Per Sector: " << dwBytesPerSector << endl;
double dTotalSize = dwTotalNumberOfClusters / 1024.0 / 1024.0 / 1024.0 * dwSectorsPerCluster * dwBytesPerSector;
double dFreeSize = dwNumberOfFreeClusters / 1024.0 / 1024.0 / 1024.0 * dwSectorsPerCluster * dwBytesPerSector;
cout.precision(4);
cout << "\tTotal size: " << dTotalSize << "GB\n";
cout << "\tFree size: " << dFreeSize << "GB\n";
} delete[] pString;
}
delete[] pDriveString;
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BOOL GetDiskFreeSpace(
LPCTSTR lpRootPathName, // pointer to root path
LPDWORD lpSectorsPerCluster, // pointer to sectors per cluster
LPDWORD lpBytesPerSector, // pointer to bytes per sector
LPDWORD lpNumberOfFreeClusters,
// pointer to number of free clusters
LPDWORD lpTotalNumberOfClusters
// pointer to total number of clusters
);
BOOL GetVolumeInformation(
LPCTSTR lpRootPathName, // root directory
LPTSTR lpVolumeNameBuffer, // volume name buffer
DWORD nVolumeNameSize, // length of name buffer
LPDWORD lpVolumeSerialNumber, // volume serial number
LPDWORD lpMaximumComponentLength, // maximum file name length
LPDWORD lpFileSystemFlags, // file system options
LPTSTR lpFileSystemNameBuffer, // file system name buffer
DWORD nFileSystemNameSize // length of file system name buffer
);
(HANDLE) hDevice, // handle to device
IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, // dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
(LPVOID) lpOutBuffer, // output buffer
(DWORD) nOutBufferSize, // size of output buffer
(LPDWORD) lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) lpOverlapped // OVERLAPPED structure
);
Parameters
hDevice
[in] Handle to the volume. To retrieve a device handle, call the CreateFile function.
dwIoControlCode
[in] Control code for the operation. Use IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS for this operation.
lpInBuffer
Not used with this operation; set to NULL.
nInBufferSize
Not used with this operation; set to zero.
lpOutBuffer
[out] Pointer to a buffer that receives a VOLUME_DISK_EXTENTS structure specifying the physical location of the disk.
nOutBufferSize
[in] Size of the output buffer.
lpBytesReturned
[out] Pointer to a variable that receives the size of the data stored in the output buffer, in bytes.
If the output buffer is too small, the call fails, GetLastError returns ERROR_INSUFFICIENT_BUFFER, and lpBytesReturned is zero.If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when an operation returns no output data and lpOutBuffer is NULL, DeviceIoControl makes use of lpBytesReturned. After such an operation, the value of lpBytesReturned is meaningless.If lpOverlapped is not NULL, lpBytesReturned can be NULL. If this parameter is not NULL and the operation returns data, lpBytesReturned is meaningless until the overlapped operation has completed. To retrieve the number of bytes returned, call GetOverlappedResult. If hDevice is associated with an I/O completion port, you can retrieve the number of bytes returned by calling GetQueuedCompletionStatus.lpOverlapped
[in] Pointer to an OVERLAPPED structure.
If hDevice was opened without specifying FILE_FLAG_OVERLAPPED, lpOverlapped is ignored. If hDevice was opened with the FILE_FLAG_OVERLAPPED flag, the operation is performed as an overlapped (asynchronous) operation. In this case, lpOverlapped must point to a valid OVERLAPPED structure that contains a handle to an event object. Otherwise, the function fails in unpredicatable ways. For overlapped operations, DeviceIoControl returns immediately, and the event object is signaled when the operation has been completed. Otherwise, the function does not return until the operation has been completed or an error occurs.Return Values
If the operation succeeds, DeviceIoControl returns zero.If the operation fails, DeviceIoControl returns a nonzero value. To get extended error information, call GetLastError.