/// <inheritdoc />
public Task CreateSymbolicLink(string targetPath, string linkPath, CancellationToken cancellationToken) => Task.Factory.StartNew(() =>
{
if (targetPath == null)
{
throw new ArgumentNullException(nameof(targetPath));
}
if (linkPath == null)
{
throw new ArgumentNullException(nameof(linkPath));
}
//check if its not a file
var flags = File.Exists(targetPath) ? NativeMethods.CreateSymbolicLinkFlags.None : NativeMethods.CreateSymbolicLinkFlags.Directory;
flags |= NativeMethods.CreateSymbolicLinkFlags.AllowUnprivilegedCreate;
cancellationToken.ThrowIfCancellationRequested();
if (!NativeMethods.CreateSymbolicLink(linkPath, targetPath, flags))
{
if (Win32Exception.GetLastWin32Error() == Win32Error.ERROR_INVALID_PARAMETER) //SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE isn't supported
{
flags &= ~NativeMethods.CreateSymbolicLinkFlags.AllowUnprivilegedCreate;
if (NativeMethods.CreateSymbolicLink(linkPath, targetPath, flags))
{
return;
}
}
throw new Win32Exception();
}
}, cancellationToken, TaskCreationOptions.LongRunning, TaskScheduler.Current);
protected AbstractJournalScanner(string scanFolder, IFileRecordListener recordListener, IFileRecordFilter recordFilter = null)
{
this.scanFolder = Path.GetFullPath(scanFolder);
this.recordFilter = recordFilter;
this.recordListener = recordListener;
var driveLetterRegex = new Regex(DriveLetterRegexString);
var driveLetterMatch = driveLetterRegex.Match(this.scanFolder);
if (driveLetterMatch.Success)
{
this.driveLetter = driveLetterMatch.Groups.Values.ElementAt(1).Value.ToUpper()[0]; //extract first letter in upper case
}
else
{
throw new ArgumentException($"invalid scanFolder path: {this.scanFolder}");
}
var drivePath = $"\\\\.\\{driveLetter}:";
this.volumeHandle = Kernel32.CreateFile(drivePath, FileAccess.Read, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, FileAttributes.Normal, IntPtr.Zero);
if (volumeHandle.IsInvalid)
{
var lastError = Win32Exception.GetLastWin32Error();
var hintMessage = lastError == Win32Error.ERROR_ACCESS_DENIED ? ". Try Run As Administrator" : string.Empty;
throw new Win32Exception(lastError, $"{new Win32Exception(lastError).Message} for path: \"{drivePath}\" {hintMessage}");
}
this.usnIo = new UsnDeviceWrapper(volumeHandle, true);
}
