/// <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));
}
/// <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));
}
/// <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 = junctionPath.GetFullPath();
targetDirectory = targetDirectory.GetFullPath();
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 = Kernel32.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);
}
}
}
public static ReparsePoint CreateSymlink(string symlinkPath, string linkTarget)
{
symlinkPath = symlinkPath.GetFullPath();
linkTarget = linkTarget.GetFullPath();
if (Directory.Exists(symlinkPath) || File.Exists(symlinkPath))
{
throw new IOException("Symlink path already exists.");
}
if (Directory.Exists(linkTarget))
{
Directory.CreateDirectory(symlinkPath);
}
else if (File.Exists(linkTarget))
{
File.Create(symlinkPath).Close();
}
else
{
throw new IOException("Target path does not exist or is not a directory.");
}
// dark magic kung-fu to get privilige to create symlink.
var state = IntPtr.Zero;
UInt32 privilege = 35;
Ntdll.RtlAcquirePrivilege(ref privilege, 1, 0, ref state);
using (var handle = GetReparsePointHandle(symlinkPath, NativeFileAccess.GenericWrite)) {
var substituteName = Encoding.Unicode.GetBytes(NonInterpretedPathPrefix + linkTarget);
var printName = Encoding.Unicode.GetBytes(linkTarget);
var extraOffset = 4;
var reparseDataBuffer = new ReparseData {
ReparseTag = IoReparseTag.Symlink,
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 + extraOffset);
Array.Copy(substituteName, 0, reparseDataBuffer.PathBuffer, extraOffset, substituteName.Length);
Array.Copy(printName, 0, reparseDataBuffer.PathBuffer, reparseDataBuffer.PrintNameOffset + extraOffset, printName.Length);
var inBufferSize = Marshal.SizeOf(reparseDataBuffer);
var inBuffer = Marshal.AllocHGlobal(inBufferSize);
try {
Marshal.StructureToPtr(reparseDataBuffer, inBuffer, false);
int bytesReturned;
var result = Kernel32.DeviceIoControl(handle, ControlCodes.SetReparsePoint, inBuffer, reparseDataBuffer.ReparseDataLength + 8, IntPtr.Zero,
0, out bytesReturned, IntPtr.Zero);
if (!result)
{
if (Directory.Exists(symlinkPath))
{
Directory.Delete(symlinkPath);
}
else if (File.Exists(symlinkPath))
{
File.Delete(symlinkPath);
}
throw new IOException("Unable to create symlink.", Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
return(Open(symlinkPath));
} finally {
Marshal.FreeHGlobal(inBuffer);
try {
if (state != IntPtr.Zero)
{
Ntdll.RtlReleasePrivilege(state);
}
} catch {
// sometimes this doesn't work so well
}
}
}
}
public static ReparsePoint CreateSymlink(string symlinkPath, string linkTarget) {
symlinkPath = symlinkPath.GetFullPath();
linkTarget = linkTarget.GetFullPath();
if (Directory.Exists(symlinkPath) || File.Exists(symlinkPath)) {
throw new IOException("Symlink path already exists.");
}
if (Directory.Exists(linkTarget)) {
Directory.CreateDirectory(symlinkPath);
} else if (File.Exists(linkTarget)) {
File.Create(symlinkPath).Close();
} else {
throw new IOException("Target path does not exist or is not a directory.");
}
// dark magic kung-fu to get privilige to create symlink.
var state = IntPtr.Zero;
UInt32 privilege = 35;
Ntdll.RtlAcquirePrivilege(ref privilege, 1, 0, ref state);
using (var handle = GetReparsePointHandle(symlinkPath, NativeFileAccess.GenericWrite)) {
var substituteName = Encoding.Unicode.GetBytes(NonInterpretedPathPrefix + linkTarget);
var printName = Encoding.Unicode.GetBytes(linkTarget);
var extraOffset = 4;
var reparseDataBuffer = new ReparseData {
ReparseTag = IoReparseTag.Symlink,
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 + extraOffset);
Array.Copy(substituteName, 0, reparseDataBuffer.PathBuffer, extraOffset, substituteName.Length);
Array.Copy(printName, 0, reparseDataBuffer.PathBuffer, reparseDataBuffer.PrintNameOffset + extraOffset, printName.Length);
var inBufferSize = Marshal.SizeOf(reparseDataBuffer);
var inBuffer = Marshal.AllocHGlobal(inBufferSize);
try {
Marshal.StructureToPtr(reparseDataBuffer, inBuffer, false);
int bytesReturned;
var result = Kernel32.DeviceIoControl(handle, ControlCodes.SetReparsePoint, inBuffer, reparseDataBuffer.ReparseDataLength + 8, IntPtr.Zero,
0, out bytesReturned, IntPtr.Zero);
if (!result) {
if (Directory.Exists(symlinkPath)) {
Directory.Delete(symlinkPath);
} else if (File.Exists(symlinkPath)) {
File.Delete(symlinkPath);
}
throw new IOException("Unable to create symlink.", Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()));
}
return Open(symlinkPath);
} finally {
Marshal.FreeHGlobal(inBuffer);
try {
if (state != IntPtr.Zero) {
Ntdll.RtlReleasePrivilege(state);
}
} catch {
// sometimes this doesn't work so well
}
}
}
}
/// <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 = junctionPath.GetFullPath();
targetDirectory = targetDirectory.GetFullPath();
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 = Kernel32.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);
}
}
}
