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;
}
private void EraseUnusedSpace(Task task, UnusedSpaceTarget target)
{
if (!AdvApi.IsAdministrator())
{
if (Environment.OSVersion.Platform == PlatformID.Win32NT &&
Environment.OSVersion.Version >= new Version(6, 0))
{
throw new UnauthorizedAccessException(S._("The program does not have the " +
"required permissions to erase the unused space on disk. Run the program " +
"as an administrator and retry the operation."));
}
else
throw new UnauthorizedAccessException(S._("The program does not have the " +
"required permissions to erase the unused space on disk."));
}
if (SystemRestore.GetInstances().Count != 0)
{
task.Log.LastSessionEntries.Add(new LogEntry(S._("The drive {0} has System " +
"Restore or Volume Shadow Copies enabled. This may allow copies of files " +
"stored on the disk to be recovered and pose a security concern.",
target.Drive), LogLevel.Warning));
}
if (VolumeInfo.FromMountpoint(target.Drive).HasQuota)
task.Log.LastSessionEntries.Add(new LogEntry(S._("The drive {0} has disk quotas " +
"active. This will prevent the complete erasure of unused space and may pose " +
"a security concern.", target.Drive), LogLevel.Warning));
ErasureMethod method = target.Method;
DirectoryInfo info = new DirectoryInfo(target.Drive);
VolumeInfo volInfo = VolumeInfo.FromMountpoint(target.Drive);
FileSystem fsManager = FileSystemManager.Get(volInfo);
SteppedProgressManager progress = new SteppedProgressManager();
target.Progress = progress;
task.Progress.Steps.Add(new SteppedProgressManager.Step(
progress, 1.0f / task.Targets.Count));
if (target.EraseClusterTips)
{
ProgressManager tipSearch = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(tipSearch,
0.0f, S._("Searching for files' cluster tips...")));
tipSearch.Total = 1;
ClusterTipsSearchProgress searchProgress = delegate(string path)
{
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
task.OnProgressChanged(target,
new ProgressChangedEventArgs(tipSearch,
new TaskProgressChangedEventArgs(path, 0, 0)));
};
ProgressManager tipProgress = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(tipProgress, 0.1f,
S._("Erasing cluster tips...")));
ClusterTipsEraseProgress eraseProgress =
delegate(int currentFile, int totalFiles, string currentFilePath)
{
tipSearch.Completed = tipSearch.Total;
tipProgress.Total = totalFiles;
tipProgress.Completed = currentFile;
task.OnProgressChanged(target,
new ProgressChangedEventArgs(tipProgress,
new TaskProgressChangedEventArgs(currentFilePath, 0, 0)));
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
};
fsManager.EraseClusterTips(VolumeInfo.FromMountpoint(target.Drive),
method, task.Log, searchProgress, eraseProgress);
}
info = info.CreateSubdirectory(Path.GetFileName(
FileSystem.GenerateRandomFileName(info, 18)));
try
{
if (Eraser.Util.File.IsCompressed(info.FullName))
Eraser.Util.File.SetCompression(info.FullName, false);
ProgressManager mainProgress = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(mainProgress,
target.EraseClusterTips ? 0.8f : 0.9f, S._("Erasing unused space...")));
while (volInfo.AvailableFreeSpace > 0)
{
string currFile = FileSystem.GenerateRandomFileName(info, 18);
using (FileStream stream = new FileStream(currFile, FileMode.CreateNew,
FileAccess.Write, FileShare.None, 8, FileOptions.WriteThrough))
{
mainProgress.Total = mainProgress.Completed + volInfo.AvailableFreeSpace;
long streamLength = Math.Min(ErasureMethod.FreeSpaceFileUnit,
mainProgress.Total);
while (true)
try
{
stream.SetLength(streamLength);
break;
}
catch (IOException)
{
if (streamLength > volInfo.ClusterSize)
streamLength -= volInfo.ClusterSize;
else
throw;
}
method.Erase(stream, long.MaxValue,
PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng),
delegate(long lastWritten, long totalData, int currentPass)
{
mainProgress.Completed += lastWritten;
task.OnProgressChanged(target,
new ProgressChangedEventArgs(mainProgress,
new TaskProgressChangedEventArgs(target.Drive, currentPass, method.Passes)));
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
}
);
}
}
mainProgress.Completed = mainProgress.Total;
ProgressManager residentProgress = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(residentProgress,
0.05f, S._("Old resident file system table files")));
fsManager.EraseOldFileSystemResidentFiles(volInfo, info, method,
delegate(int currentFile, int totalFiles)
{
residentProgress.Completed = currentFile;
residentProgress.Total = totalFiles;
task.OnProgressChanged(target,
new ProgressChangedEventArgs(residentProgress,
new TaskProgressChangedEventArgs(string.Empty, 0, 0)));
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
}
);
residentProgress.Completed = residentProgress.Total = 1;
}
finally
{
ProgressManager tempFiles = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(tempFiles,
0.0f, S._("Removing temporary files...")));
task.OnProgressChanged(target, new ProgressChangedEventArgs(tempFiles,
new TaskProgressChangedEventArgs(string.Empty, 0, 0)));
fsManager.DeleteFolder(info);
tempFiles.Completed = tempFiles.Total = 1;
}
ProgressManager structureProgress = new ProgressManager();
progress.Steps.Add(new SteppedProgressManager.Step(structureProgress,
0.05f, S._("Erasing unused directory structures...")));
fsManager.EraseDirectoryStructures(volInfo,
delegate(int currentFile, int totalFiles)
{
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
structureProgress.Total = totalFiles;
structureProgress.Completed = currentFile;
task.OnProgressChanged(target,
new ProgressChangedEventArgs(structureProgress,
new TaskProgressChangedEventArgs(string.Empty, 0, 0)));
}
);
structureProgress.Completed = structureProgress.Total;
target.Progress = null;
}
private void EraseUnusedSpace(Task task, UnusedSpaceTarget target, TaskProgressManager progress)
{
if (!AdvApi.IsAdministrator())
{
if (Environment.OSVersion.Platform == PlatformID.Win32NT &&
Environment.OSVersion.Version >= new Version(6, 0))
{
throw new UnauthorizedAccessException(S._("The program does not have the " +
"required permissions to erase the unused space on disk. Run the program " +
"as an administrator and retry the operation."));
}
else
throw new UnauthorizedAccessException(S._("The program does not have the " +
"required permissions to erase the unused space on disk"));
}
if (VolumeInfo.FromMountpoint(target.Drive).HasQuota)
task.Log.LastSessionEntries.Add(new LogEntry(S._("The drive which is having its " +
"unused space erased has disk quotas active. This will prevent the complete " +
"erasure of unused space and will pose a security concern"), LogLevel.Warning));
ErasureMethod method = target.Method;
DirectoryInfo info = new DirectoryInfo(target.Drive);
VolumeInfo volInfo = VolumeInfo.FromMountpoint(target.Drive);
FileSystem fsManager = FileSystemManager.Get(volInfo);
if (target.EraseClusterTips)
{
progress.Event.CurrentTargetStatus = S._("Searching for files' cluster tips...");
progress.Event.CurrentTargetTotalPasses = method.Passes;
progress.Event.CurrentItemProgress = -1.0f;
progress.Event.TimeLeft = new TimeSpan(0, 0, -1);
ProgressManager tipProgress = new ProgressManager();
tipProgress.Start();
ClusterTipsSearchProgress searchProgress = delegate(string path)
{
progress.Event.CurrentItemName = path;
task.OnProgressChanged(progress.Event);
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
};
ClusterTipsEraseProgress eraseProgress =
delegate(int currentFile, int totalFiles, string currentFilePath)
{
tipProgress.Total = totalFiles;
tipProgress.Completed = currentFile;
progress.Event.CurrentTargetStatus = S._("Erasing cluster tips...");
progress.Event.CurrentItemName = currentFilePath;
progress.Event.CurrentItemProgress = tipProgress.Progress;
progress.Event.CurrentTargetProgress = progress.Event.CurrentItemProgress / 10;
progress.Event.TimeLeft = tipProgress.TimeLeft;
task.OnProgressChanged(progress.Event);
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
};
fsManager.EraseClusterTips(VolumeInfo.FromMountpoint(target.Drive),
method, task.Log, searchProgress, eraseProgress);
}
info = info.CreateSubdirectory(Path.GetFileName(
FileSystem.GenerateRandomFileName(info, 18)));
try
{
if (Eraser.Util.File.IsCompressed(info.FullName))
Eraser.Util.File.SetCompression(info.FullName, false);
progress.Event.CurrentTargetStatus = S._("Erasing unused space...");
progress.Event.CurrentItemName = target.Drive;
task.OnProgressChanged(progress.Event);
while (volInfo.AvailableFreeSpace > 0)
{
string currFile = FileSystem.GenerateRandomFileName(info, 18);
using (FileStream stream = new FileStream(currFile, FileMode.CreateNew,
FileAccess.Write, FileShare.None, 8, FileOptions.WriteThrough))
{
long streamLength = Math.Min(ErasureMethod.FreeSpaceFileUnit,
volInfo.AvailableFreeSpace);
while (true)
try
{
stream.SetLength(streamLength);
break;
}
catch (IOException)
{
if (streamLength > volInfo.ClusterSize)
streamLength -= volInfo.ClusterSize;
else
throw;
}
method.Erase(stream, long.MaxValue,
PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng),
delegate(long lastWritten, long totalData, int currentPass)
{
progress.Completed = Math.Min(progress.Total,
progress.Completed + lastWritten);
progress.Event.CurrentItemPass = currentPass;
progress.Event.CurrentItemProgress = progress.Progress;
if (target.EraseClusterTips)
progress.Event.CurrentTargetProgress = (float)
(0.1f + progress.Event.CurrentItemProgress * 0.8f);
else
progress.Event.CurrentTargetProgress = (float)
(progress.Event.CurrentItemProgress * 0.9f);
progress.Event.TimeLeft = progress.TimeLeft;
task.OnProgressChanged(progress.Event);
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
}
);
}
}
progress.Event.CurrentItemName = S._("Old resident file system table files");
task.OnProgressChanged(progress.Event);
fsManager.EraseOldFileSystemResidentFiles(volInfo, info, method, null);
}
finally
{
progress.Event.CurrentTargetStatus = S._("Removing temporary files...");
task.OnProgressChanged(progress.Event);
fsManager.DeleteFolder(info);
}
progress.Event.CurrentTargetStatus = S._("Erasing unused directory structures...");
ProgressManager fsEntriesProgress = new ProgressManager();
fsEntriesProgress.Start();
fsManager.EraseDirectoryStructures(volInfo,
delegate(int currentFile, int totalFiles)
{
if (currentTask.Canceled)
throw new OperationCanceledException(S._("The task was cancelled."));
fsEntriesProgress.Total = totalFiles;
fsEntriesProgress.Completed = currentFile;
progress.Event.TimeLeft = fsEntriesProgress.TimeLeft;
progress.Event.CurrentItemProgress = fsEntriesProgress.Progress;
progress.Event.CurrentTargetProgress = (float)(
0.9 + progress.Event.CurrentItemProgress / 10);
task.OnProgressChanged(progress.Event);
}
);
}
