public Stream OpenStream(FileAccess pFileAccess = FileAccess.Read, FileShare pShareMode = FileShare.ReadWrite, FileMode pFileMode = FileMode.OpenOrCreate)
{
IntPtr hFile = Win32Find.CreateFile(FullPath, pFileAccess, pShareMode, IntPtr.Zero, pFileMode, Win32Find.EFileAttributes.Normal, 0);
if (hFile == new IntPtr(-1))
{
var lasterr = Marshal.GetLastWin32Error();
throw new Win32Exception(lasterr);
}
else
{
SafeFileHandle sfh = new SafeFileHandle(hFile, true);
return(new FileStream(sfh, pFileAccess));
}
}
private static IEnumerable <string> GetStreamsXP(String file)
{
//on Windows XP, we can use NTQueryInformationFile.
//first, open the file with Backup Semantics.
IntPtr hFile = Win32Find.CreateFile(file, FileAccess.Read, FileShare.Read, IntPtr.Zero, FileMode.Open, Win32Find.EFileAttributes.BackupSemantics, 0);
//if the Open fails, we'll throw an exception.
if (hFile == new IntPtr(-1))
{
var lasterr = Marshal.GetLastWin32Error();
throw new Win32Exception(lasterr);
}
int lErr = 234;
uint Chunksize = 4096;
byte[] databuffer = new byte[Chunksize];
MemoryStream StreamData = new MemoryStream();
Win32Find.IO_STATUS_BLOCK IoBlock = new Win32Find.IO_STATUS_BLOCK();
while (lErr == 234) //234 means more file information is available to read.
{
databuffer = new byte[Chunksize];
IntPtr resultitem = Marshal.AllocHGlobal((int)Chunksize);
IntPtr result = Win32Find.NtQueryInformationFile(hFile, ref IoBlock, resultitem, Chunksize, Win32Find.FILE_INFORMATION_CLASS.FileStreamInformation);
lErr = result.ToInt32();
Marshal.Copy(resultitem, databuffer, 0, (int)Chunksize);
Marshal.FreeHGlobal(resultitem);
StreamData.Write(databuffer, 0, (int)Chunksize);
}
StreamData.Seek(0, SeekOrigin.Begin);
BinaryReader sr = new BinaryReader(StreamData);
do
{
//now read in a FSInfo structure.
Win32Find.FILE_STREAM_INFORMATION fsInfo = new Win32Find.FILE_STREAM_INFORMATION();
//seek to the start of the Memory Buffer.
int fssize = Marshal.SizeOf(typeof(Win32Find.FILE_STREAM_INFORMATION));
byte[] fsdata = new byte[fssize];
StreamData.Read(fsdata, 0, fssize);
String readstring = Encoding.Unicode.GetString(fsdata);
//marshal this byte into a structure.
GCHandle fshandle = GCHandle.Alloc(fsdata, GCHandleType.Pinned);
fsInfo = (Win32Find.FILE_STREAM_INFORMATION)Marshal.PtrToStructure(fshandle.AddrOfPinnedObject(), typeof(Win32Find.FILE_STREAM_INFORMATION));
Byte[] grabbytes = sr.ReadBytes((int)fsInfo.StreamNameLength);
String acquiredName = Encoding.Unicode.GetString(grabbytes);
yield return(acquiredName);
fshandle.Free();
if (fsInfo.NextEntryOffset == 0)
{
break;
}
sr.ReadBytes((int)fsInfo.NextEntryOffset - fssize - (int)fsInfo.StreamNameLength);
} while (true);
Win32Find.CloseHandle(hFile);
}
