public void EnumerateVolume(
out Dictionary <UInt64, FileNameAndFrn> files, string[] fileExtensions)
{
files = new Dictionary <ulong, FileNameAndFrn>();
IntPtr medBuffer = IntPtr.Zero;
try
{
GetRootFrnEntry();
GetRootHandle();
CreateChangeJournal();
SetupMFT_Enum_DataBuffer(ref medBuffer);
EnumerateFiles(medBuffer, ref files, fileExtensions);
}
catch (Exception e)
{
// Log.Info(e.Message, e);
Exception innerException = e.InnerException;
while (innerException != null)
{
// Log.Info(innerException.Message, innerException);
innerException = innerException.InnerException;
}
throw new ApplicationException("Error in EnumerateVolume()", e);
}
finally
{
if (_changeJournalRootHandle.ToInt32() != PInvokeWin32.INVALID_HANDLE_VALUE)
{
PInvokeWin32.CloseHandle(_changeJournalRootHandle);
}
if (medBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(medBuffer);
}
}
}
private void GetRootFrnEntry()
{
string driveRoot = string.Concat("\\\\.\\", _drive);
driveRoot = string.Concat(driveRoot, Path.DirectorySeparatorChar);
IntPtr hRoot = PInvokeWin32.CreateFile(driveRoot,
0,
PInvokeWin32.FILE_SHARE_READ | PInvokeWin32.FILE_SHARE_WRITE,
IntPtr.Zero,
PInvokeWin32.OPEN_EXISTING,
PInvokeWin32.FILE_FLAG_BACKUP_SEMANTICS,
IntPtr.Zero);
if (hRoot.ToInt32() != PInvokeWin32.INVALID_HANDLE_VALUE)
{
PInvokeWin32.BY_HANDLE_FILE_INFORMATION fi = new PInvokeWin32.BY_HANDLE_FILE_INFORMATION();
bool bRtn = PInvokeWin32.GetFileInformationByHandle(hRoot, out fi);
if (bRtn)
{
UInt64 fileIndexHigh = (UInt64)fi.FileIndexHigh;
UInt64 indexRoot = (fileIndexHigh << 32) | fi.FileIndexLow;
FileNameAndParentFrn f = new FileNameAndParentFrn(driveRoot, 0);
_directories.Add(indexRoot, f);
}
else
{
throw new IOException("GetFileInformationbyHandle() returned invalid handle",
new Win32Exception(Marshal.GetLastWin32Error()));
}
PInvokeWin32.CloseHandle(hRoot);
}
else
{
throw new IOException("Unable to get root frn entry", new Win32Exception(Marshal.GetLastWin32Error()));
}
}