public void EnumerateVolume(out Dictionary <UInt64, FileNameAndParentFrn> files, string[] fileExtensions)
{
files = new Dictionary <ulong, FileNameAndParentFrn>();
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() != MFTReader.INVALID_HANDLE_VALUE)
{
MFTReader.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 = MFTReader.CreateFile(driveRoot,
0,
MFTReader.FILE_SHARE_READ | MFTReader.FILE_SHARE_WRITE,
IntPtr.Zero,
MFTReader.OPEN_EXISTING,
MFTReader.FILE_FLAG_BACKUP_SEMANTICS,
IntPtr.Zero);
if (hRoot.ToInt32() != MFTReader.INVALID_HANDLE_VALUE)
{
MFTReader.BY_HANDLE_FILE_INFORMATION fi = new MFTReader.BY_HANDLE_FILE_INFORMATION();
bool bRtn = MFTReader.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()));
}
MFTReader.CloseHandle(hRoot);
}
else
{
throw new IOException("Unable to get root frn entry", new Win32Exception(Marshal.GetLastWin32Error()));
}
}