public override void EraseFileSystemObject(StreamInfo info, ErasureMethod method,
ErasureMethodProgressFunction callback)
{
VolumeInfo volume = VolumeInfo.FromMountpoint(info.DirectoryName);
if (info.Length < Math.Max(volume.ClusterSize, 1024))
{
using (FileStream strm = info.Open(FileMode.Open, FileAccess.Write,
FileShare.None))
{
method.Erase(strm, long.MaxValue,
PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng), null);
}
}
long fileArea = GetFileArea(info.FullName);
if (fileArea == 0)
return;
using (FileStream strm = info.Open(FileMode.Open, FileAccess.Write,
FileShare.None, FileOptions.WriteThrough))
{
strm.SetLength(fileArea);
method.Erase(strm, long.MaxValue,
PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng),
callback
);
strm.Seek(0, SeekOrigin.Begin);
strm.SetLength(0);
}
}
public override long GetFileArea(string filePath)
{
StreamInfo info = new StreamInfo(filePath);
VolumeInfo volume = VolumeInfo.FromMountPoint(info.Directory.FullName);
long clusterSize = volume.ClusterSize;
return (info.Length + (clusterSize - 1)) & ~(clusterSize - 1);
}
public override void EraseClusterTips(VolumeInfo info, ErasureMethod method,
ClusterTipsSearchProgress searchCallback, ClusterTipsEraseProgress eraseCallback)
{
List<string> files = new List<string>();
if (!info.IsMounted)
throw new InvalidOperationException(S._("Could not erase cluster tips in {0} " +
"as the volume is not mounted.", info.VolumeId));
ListFiles(new DirectoryInfo(info.MountPoints[0]), files, searchCallback);
for (int i = 0, j = files.Count; i != j; ++i)
{
StreamInfo streamInfo = new StreamInfo(files[i]);
FileAttributes fileAttr = streamInfo.Attributes;
try
{
streamInfo.Attributes = FileAttributes.Normal;
EraseFileClusterTips(files[i], method);
}
catch (UnauthorizedAccessException)
{
Logger.Log(S._("{0} did not have its cluster tips erased because you do not " +
"have the required permissions to erase the file cluster tips.", files[i]),
LogLevel.Information);
}
catch (IOException e)
{
Logger.Log(S._("{0} did not have its cluster tips erased. The error returned " +
"was: {1}", files[i], e.Message), LogLevel.Error);
}
finally
{
streamInfo.Attributes = fileAttr;
}
eraseCallback(i, files.Count, files[i]);
}
}
public static IList<string> GetADSes(FileInfo info)
{
List<string> result = new List<string>();
using (FileStream stream = new StreamInfo(info.FullName).Open(FileMode.Open,
FileAccess.Read, FileShare.ReadWrite))
using (SafeFileHandle streamHandle = stream.SafeFileHandle)
{
NativeMethods.FILE_STREAM_INFORMATION[] streams = GetADSes(streamHandle);
foreach (NativeMethods.FILE_STREAM_INFORMATION streamInfo in streams)
{
string streamName = streamInfo.StreamName.Substring(1,
streamInfo.StreamName.LastIndexOf(':') - 1);
if (streamName.Length != 0)
result.Add(streamName);
}
}
return result.AsReadOnly();
}
private void EraseFileClusterTips(string file, ErasureMethod method)
{
StreamInfo streamInfo = new StreamInfo(file);
DateTime lastAccess = streamInfo.LastAccessTime;
DateTime lastWrite = streamInfo.LastWriteTime;
DateTime created = streamInfo.CreationTime;
long fileArea = GetFileArea(file);
long fileLength = streamInfo.Length;
if (fileArea == fileLength)
return;
using (FileStream stream = streamInfo.Open(FileMode.Open, FileAccess.Write,
FileShare.None, FileOptions.WriteThrough))
{
try
{
stream.SetLength(fileArea);
stream.Seek(fileLength, SeekOrigin.Begin);
method.Erase(stream, long.MaxValue, PrngManager.GetInstance(
ManagerLibrary.Settings.ActivePrng), null);
}
finally
{
stream.SetLength(fileLength);
streamInfo.LastAccessTime = lastAccess;
streamInfo.LastWriteTime = lastWrite;
streamInfo.CreationTime = created;
}
}
}
private void EraseFilesystemObject(Task task, FileSystemObjectTarget target)
{
long dataTotal = 0;
List<string> paths = target.GetPaths(out dataTotal);
ErasureMethod method = target.Method;
TaskEventArgs eventArgs = new TaskEventArgs(task);
SteppedProgressManager progress = new SteppedProgressManager();
target.Progress = progress;
task.Progress.Steps.Add(new SteppedProgressManager.Step(progress, 1.0f / task.Targets.Count));
for (int i = 0; i < paths.Count; ++i)
{
ProgressManager step = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(step,
1.0f / paths.Count, S._("Erasing files...")));
task.OnProgressChanged(target,
new ProgressChangedEventArgs(step,
new TaskProgressChangedEventArgs(paths[i], 0, method.Passes)));
StreamInfo info = new StreamInfo(paths[i]);
FileSystem fsManager = FileSystemManager.Get(
VolumeInfo.FromMountpoint(info.DirectoryName));
if (!info.Exists)
{
task.Log.LastSessionEntries.Add(new LogEntry(S._("The file {0} was not erased " +
"as the file does not exist.", paths[i]), LogLevel.Notice));
continue;
}
bool isReadOnly = false;
try
{
if (isReadOnly = info.IsReadOnly)
info.IsReadOnly = false;
if ((info.Attributes & FileAttributes.Compressed) != 0 ||
(info.Attributes & FileAttributes.Encrypted) != 0 ||
(info.Attributes & FileAttributes.SparseFile) != 0)
{
task.Log.LastSessionEntries.Add(new LogEntry(S._("The file {0} could " +
"not be erased because the file was either compressed, encrypted or " +
"a sparse file.", info.FullName), LogLevel.Error));
}
fsManager.EraseFileSystemObject(info, method,
delegate(long lastWritten, long totalData, int currentPass)
{
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
step.Completed += lastWritten;
step.Total = totalData;
task.OnProgressChanged(target,
new ProgressChangedEventArgs(step,
new TaskProgressChangedEventArgs(info.FullName, currentPass, method.Passes)));
});
FileInfo fileInfo = info.File;
if (fileInfo != null)
fsManager.DeleteFile(fileInfo);
step.Completed = step.Total = 1;
}
catch (UnauthorizedAccessException)
{
task.Log.LastSessionEntries.Add(new LogEntry(S._("The file {0} could not " +
"be erased because the file's permissions prevent access to the file.",
info.FullName), LogLevel.Error));
}
catch (FileLoadException)
{
if (!ManagerLibrary.Settings.ForceUnlockLockedFiles)
throw;
List<System.Diagnostics.Process> processes = new List<System.Diagnostics.Process>();
foreach (OpenHandle handle in OpenHandle.Items)
if (handle.Path == paths[i])
processes.Add(System.Diagnostics.Process.GetProcessById(handle.ProcessId));
StringBuilder processStr = new StringBuilder();
foreach (System.Diagnostics.Process process in processes)
processStr.AppendFormat(System.Globalization.CultureInfo.InvariantCulture,
"{0}, ", process.MainModule.FileName);
task.Log.LastSessionEntries.Add(new LogEntry(S._(
"Could not force closure of file \"{0}\" (locked by {1})",
paths[i], processStr.ToString().Remove(processStr.Length - 2)), LogLevel.Error));
}
finally
{
if (isReadOnly && info.Exists && !info.IsReadOnly)
info.IsReadOnly = isReadOnly;
}
}
if (target is FolderTarget)
{
ProgressManager step = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(step,
0.0f, S._("Removing folders...")));
FolderTarget fldr = (FolderTarget)target;
FileSystem fsManager = FileSystemManager.Get(VolumeInfo.FromMountpoint(fldr.Path));
Action<DirectoryInfo> eraseEmptySubFolders = null;
eraseEmptySubFolders = delegate(DirectoryInfo info)
{
foreach (DirectoryInfo subDir in info.GetDirectories())
eraseEmptySubFolders(subDir);
task.OnProgressChanged(target,
new ProgressChangedEventArgs(step,
new TaskProgressChangedEventArgs(info.FullName, 0, 0)));
FileSystemInfo[] files = info.GetFileSystemInfos();
if (files.Length == 0)
fsManager.DeleteFolder(info);
};
eraseEmptySubFolders(new DirectoryInfo(fldr.Path));
if (fldr.DeleteIfEmpty)
{
DirectoryInfo info = new DirectoryInfo(fldr.Path);
task.OnProgressChanged(target,
new ProgressChangedEventArgs(step,
new TaskProgressChangedEventArgs(info.FullName, 0, 0)));
bool isVolumeRoot = info.Parent == null;
foreach (VolumeInfo volume in VolumeInfo.Volumes)
foreach (string mountPoint in volume.MountPoints)
if (info.FullName == mountPoint)
isVolumeRoot = true;
if (!isVolumeRoot && info.Exists && info.GetFiles("*", SearchOption.AllDirectories).Length == 0)
fsManager.DeleteFolder(info);
}
}
if (target is RecycleBinTarget)
{
ProgressManager step = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(step,
0.0f, S._("Emptying recycle bin...")));
task.OnProgressChanged(target,
new ProgressChangedEventArgs(step,
new TaskProgressChangedEventArgs(string.Empty, 0, 0)));
ShellApi.EmptyRecycleBin(EmptyRecycleBinOptions.NoConfirmation |
EmptyRecycleBinOptions.NoProgressUI | EmptyRecycleBinOptions.NoSound);
}
target.Progress = null;
}
public abstract void EraseFileSystemObject(StreamInfo info, ErasureMethod method, ErasureMethodProgressFunction callback);
public override void EraseFileSystemObject(StreamInfo info, ErasureMethod method,
ErasureMethodProgressFunction callback)
{
long fileArea = GetFileArea(info.FullName);
using (FileStream strm = info.Open(FileMode.Open, FileAccess.Write,
FileShare.None, FileOptions.WriteThrough))
{
strm.SetLength(fileArea);
if (strm.Length != 0)
{
method.Erase(strm, long.MaxValue,
PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng),
callback
);
}
strm.Seek(0, SeekOrigin.Begin);
strm.SetLength(0);
}
}
