/// <summary>
/// Gets the reparse point data associated with a file or directory.
/// </summary>
/// <param name="path">The file to query</param>
/// <returns>The reparse point information</returns>
public ReparsePoint GetReparsePoint(string path)
{
using (new NtfsTransaction())
{
DirectoryEntry dirEntry = GetDirectoryEntry(path);
if (dirEntry == null)
{
throw new FileNotFoundException("File not found", path);
}
else
{
File file = GetFile(dirEntry.Reference);
NtfsStream stream = file.GetStream(AttributeType.ReparsePoint, null);
if (stream != null)
{
ReparsePointRecord rp = new ReparsePointRecord();
using (Stream contentStream = stream.Open(FileAccess.Read))
{
byte[] buffer = Utilities.ReadFully(contentStream, (int)contentStream.Length);
rp.ReadFrom(buffer, 0);
return new ReparsePoint((int)rp.Tag, rp.Content);
}
}
}
}
return null;
}
private void RemoveReparsePoint(File file)
{
NtfsStream stream = file.GetStream(AttributeType.ReparsePoint, null);
if (stream != null)
{
ReparsePointRecord rp = new ReparsePointRecord();
using (Stream contentStream = stream.Open(FileAccess.Read))
{
byte[] buffer = Utilities.ReadFully(contentStream, (int)contentStream.Length);
rp.ReadFrom(buffer, 0);
}
file.RemoveStream(stream);
// Update the standard information attribute - so it reflects the actual file state
NtfsStream stdInfoStream = file.GetStream(AttributeType.StandardInformation, null);
StandardInformation si = stdInfoStream.GetContent<StandardInformation>();
si.FileAttributes = si.FileAttributes & ~FileAttributeFlags.ReparsePoint;
stdInfoStream.SetContent(si);
// Remove the reparse point from the index
_context.ReparsePoints.Remove(rp.Tag, file.MftReference);
}
}
/// <summary>
/// Sets the reparse point data on a file or directory.
/// </summary>
/// <param name="path">The file to set the reparse point on.</param>
/// <param name="reparsePoint">The new reparse point.</param>
public void SetReparsePoint(string path, ReparsePoint reparsePoint)
{
using (new NtfsTransaction())
{
DirectoryEntry dirEntry = GetDirectoryEntry(path);
if (dirEntry == null)
{
throw new FileNotFoundException("File not found", path);
}
else
{
File file = GetFile(dirEntry.Reference);
NtfsStream stream = file.GetStream(AttributeType.ReparsePoint, null);
if (stream != null)
{
// If there's an existing reparse point, unhook it.
using (Stream contentStream = stream.Open(FileAccess.Read))
{
byte[] oldRpBuffer = Utilities.ReadFully(contentStream, (int)contentStream.Length);
ReparsePointRecord rp = new ReparsePointRecord();
rp.ReadFrom(oldRpBuffer, 0);
_context.ReparsePoints.Remove(rp.Tag, dirEntry.Reference);
}
}
else
{
stream = file.CreateStream(AttributeType.ReparsePoint, null);
}
// Set the new content
ReparsePointRecord newRp = new ReparsePointRecord();
newRp.Tag = (uint)reparsePoint.Tag;
newRp.Content = reparsePoint.Content;
byte[] contentBuffer = new byte[newRp.Size];
newRp.WriteTo(contentBuffer, 0);
using (Stream contentStream = stream.Open(FileAccess.ReadWrite))
{
contentStream.Write(contentBuffer, 0, contentBuffer.Length);
contentStream.SetLength(contentBuffer.Length);
}
// Update the standard information attribute - so it reflects the actual file state
NtfsStream stdInfoStream = file.GetStream(AttributeType.StandardInformation, null);
StandardInformation si = stdInfoStream.GetContent<StandardInformation>();
si.FileAttributes = si.FileAttributes | FileAttributeFlags.ReparsePoint;
stdInfoStream.SetContent(si);
// Update the directory entry used to open the file, so it's accurate
dirEntry.Details.EASizeOrReparsePointTag = newRp.Tag;
dirEntry.UpdateFrom(file);
// Write attribute changes back to the Master File Table
file.UpdateRecordInMft();
// Add the reparse point to the index
_context.ReparsePoints.Add(newRp.Tag, dirEntry.Reference);
}
}
}