public static void CreateSymlinkTo(this PathSpec linkPath, PathSpec targetPath)
{
switch (targetPath.GetPathType())
{
case PathType.File:
if (!CreateSymbolicLink(linkPath.ToString(), targetPath.ToString(), TargetIsAFile))
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
break;
default:
if (!CreateSymbolicLink(linkPath.ToString(), targetPath.ToString(), TargetIsADirectory) || Marshal.GetLastWin32Error() != 0)
{
try
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
catch (COMException exception)
{
throw new IOException(exception.Message, exception);
}
}
break;
}
}
public static void RenameTo(this PathSpec source, PathSpec target)
{
switch (source.GetPathType())
{
case PathType.File:
File.Move(source.ToString(), target.ToString());
break;
case PathType.Folder:
Directory.Move(source.ToString(), target.ToString());
break;
}
}
/// <summary>
/// Creates a junction point from the specified directory to the specified target directory.
/// </summary>
/// <remarks>
/// Only works on NTFS.
/// </remarks>
/// <param name="junctionPoint">The junction point path</param>
/// <param name="targetDir">The target directory</param>
/// <param name="overwrite">If true overwrites an existing reparse point or empty directory</param>
/// <exception cref="IOException">Thrown when the junction point could not be created or when
/// an existing directory was found and <paramref name="overwrite" /> if false</exception>
public static void CreateJunctionPointTo(this PathSpec junctionPoint, PathSpec targetDir, bool overwrite)
{
targetDir = targetDir.ToAbsolute();
if (targetDir.GetPathType() != PathType.Folder)
throw new IOException("Target path does not exist or is not a directory.");
if (junctionPoint.GetPathType() == PathType.Folder)
{
if (!overwrite)
throw new IOException("Directory already exists and overwrite parameter is false.");
}
else
{
junctionPoint.Create(PathType.Folder);
}
using (SafeFileHandle handle = OpenReparsePoint(junctionPoint.ToString(), EFileAccess.GenericWrite))
{
byte[] targetDirBytes = Encoding.Unicode.GetBytes(NonInterpretedPathPrefix + Path.GetFullPath(targetDir.ToString()));
REPARSE_DATA_BUFFER reparseDataBuffer = new REPARSE_DATA_BUFFER();
reparseDataBuffer.ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
reparseDataBuffer.ReparseDataLength = (ushort)(targetDirBytes.Length + 12);
reparseDataBuffer.SubstituteNameOffset = 0;
reparseDataBuffer.SubstituteNameLength = (ushort)targetDirBytes.Length;
reparseDataBuffer.PrintNameOffset = (ushort)(targetDirBytes.Length + 2);
reparseDataBuffer.PrintNameLength = 0;
reparseDataBuffer.PathBuffer = new byte[0x3ff0];
Array.Copy(targetDirBytes, reparseDataBuffer.PathBuffer, targetDirBytes.Length);
int inBufferSize = Marshal.SizeOf(reparseDataBuffer);
IntPtr inBuffer = Marshal.AllocHGlobal(inBufferSize);
try
{
Marshal.StructureToPtr(reparseDataBuffer, inBuffer, false);
int bytesReturned;
bool result = DeviceIoControl(handle.DangerousGetHandle(), FSCTL_SET_REPARSE_POINT,
inBuffer, targetDirBytes.Length + 20, IntPtr.Zero, 0, out bytesReturned, IntPtr.Zero);
if (!result)
ThrowLastWin32Error("Unable to create junction point.");
}
finally
{
Marshal.FreeHGlobal(inBuffer);
}
}
}
