/// <summary>
/// Creates the junction.
/// </summary>
/// <param name = "junctionPath">The junction path.</param>
/// <param name = "targetDirectory">The target directory.</param>
/// <returns></returns>
/// <remarks>
/// </remarks>
public static ReparsePoint CreateJunction(string junctionPath, string targetDirectory)
{
junctionPath = Path.GetFullPath(junctionPath);
targetDirectory = Path.GetFullPath(targetDirectory);
if (!Directory.Exists(targetDirectory)) {
throw new IOException("Target path does not exist or is not a directory.");
}
if (Directory.Exists(junctionPath) || File.Exists(junctionPath)) {
throw new IOException("Junction path already exists.");
}
Directory.CreateDirectory(junctionPath);
using (var handle = GetReparsePointHandle(junctionPath, NativeFileAccess.GenericWrite)) {
var substituteName = Encoding.Unicode.GetBytes(NonInterpretedPathPrefix + targetDirectory);
var printName = Encoding.Unicode.GetBytes(targetDirectory);
var reparseDataBuffer = new ReparseData {
ReparseTag = IoReparseTag.MountPoint,
SubstituteNameOffset = 0,
SubstituteNameLength = (ushort) substituteName.Length,
PrintNameOffset = (ushort) (substituteName.Length + 2),
PrintNameLength = (ushort) printName.Length,
PathBuffer = new byte[0x3ff0],
};
reparseDataBuffer.ReparseDataLength = (ushort) (reparseDataBuffer.PrintNameLength + reparseDataBuffer.PrintNameOffset + 10);
Array.Copy(substituteName, reparseDataBuffer.PathBuffer, substituteName.Length);
Array.Copy(printName, 0, reparseDataBuffer.PathBuffer, reparseDataBuffer.PrintNameOffset, printName.Length);
var inBufferSize = Marshal.SizeOf(reparseDataBuffer);
var inBuffer = Marshal.AllocHGlobal(inBufferSize);
try {
Marshal.StructureToPtr(reparseDataBuffer, inBuffer, false);
int bytesReturned;
var result = NativeMethods.DeviceIoControl(handle, ControlCodes.SetReparsePoint, inBuffer,
reparseDataBuffer.ReparseDataLength + 8, IntPtr.Zero,
0, out bytesReturned, IntPtr.Zero);
if (!result) {
Directory.Delete(junctionPath);
throw new IOException("Unable to create junction point.",
Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
return Open(junctionPath);
}
finally {
Marshal.FreeHGlobal(inBuffer);
}
}
}
/// <summary>
/// Prevents a default instance of the <see cref = "ReparsePoint" /> class from being created.
///
/// Populates the data from the buffer pointed to by the pointer.
/// </summary>
/// <param name = "buffer">The buffer.</param>
/// <remarks>
/// </remarks>
private ReparsePoint(IntPtr buffer)
{
if (buffer == IntPtr.Zero) {
throw new ArgumentNullException("buffer");
}
_reparseDataData = (ReparseData) Marshal.PtrToStructure(buffer, typeof (ReparseData));
}