public override void Execute()
{
//Check for sufficient privileges to run the unused space erasure.
if (!Security.IsAdministrator())
{
if (Environment.OSVersion.Platform == PlatformID.Win32NT &&
Environment.OSVersion.Version >= new Version(6, 0))
{
Logger.Log(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."), LogLevel.Error);
}
else
{
Logger.Log(S._("The program does not have the required permissions to erase " +
"the unused space on disk."), LogLevel.Error);
}
return;
}
//Check whether System Restore has any available checkpoints.
if (SystemRestore.GetInstances().Count != 0)
{
Logger.Log(S._("This computer has had 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.", Drive), LogLevel.Warning);
}
//If the user is under disk quotas, log a warning message
if (VolumeInfo.FromMountPoint(Drive).HasQuota)
{
Logger.Log(S._("The drive {0} has disk quotas active. This will prevent the " +
"complete erasure of unused space and may pose a security concern.",
Drive), LogLevel.Warning);
}
//Get the erasure method if the user specified he wants the default.
IErasureMethod method = EffectiveMethod;
//Make a folder to dump our temporary files in
DirectoryInfo info = new DirectoryInfo(Drive);
VolumeInfo volInfo = VolumeInfo.FromMountPoint(Drive);
IFileSystem fsManager = Host.Instance.FileSystems[volInfo];
//Start sampling the speed of the task.
Progress = new SteppedProgressManager();
//Erase the cluster tips of every file on the drive.
if (EraseClusterTips)
{
//Define the callback handlers
ProgressManager tipSearch = new ProgressManager();
tipSearch.MarkIndeterminate();
Progress.Steps.Add(new SteppedProgressManagerStep(tipSearch,
0.0f, S._("Searching for files' cluster tips...")));
ClusterTipsSearchProgress searchProgress = delegate(string path)
{
if (Task.Canceled)
{
throw new OperationCanceledException(S._("The task was cancelled."));
}
tipSearch.Tag = path;
};
ProgressManager tipProgress = new ProgressManager();
Progress.Steps.Add(new SteppedProgressManagerStep(tipProgress, 0.1f,
S._("Erasing cluster tips...")));
ClusterTipsEraseProgress eraseProgress =
delegate(int currentFile, int totalFiles, string currentFilePath)
{
tipSearch.MarkComplete();
tipProgress.Total = totalFiles;
tipProgress.Completed = currentFile;
tipProgress.Tag = currentFilePath;
if (Task.Canceled)
{
throw new OperationCanceledException(S._("The task was cancelled."));
}
};
//Start counting statistics
fsManager.EraseClusterTips(VolumeInfo.FromMountPoint(Drive),
method, searchProgress, eraseProgress);
tipProgress.MarkComplete();
}
bool lowDiskSpaceNotifications = Shell.LowDiskSpaceNotificationsEnabled;
info = info.CreateSubdirectory(Path.GetFileName(
FileSystemBase.GenerateRandomFileName(info, 18)));
try
{
//Set the folder's compression flag off since we want to use as much
//space as possible
if (info.IsCompressed())
{
info.Uncompress();
}
//Disable the low disk space notifications
Shell.LowDiskSpaceNotificationsEnabled = false;
//Fill the disk
EraseUnusedSpace(volInfo, info, fsManager, method);
//Erase old resident file system table files
ProgressManager residentProgress = new ProgressManager();
Progress.Steps.Add(new SteppedProgressManagerStep(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;
if (Task.Canceled)
{
throw new OperationCanceledException(S._("The task was cancelled."));
}
}
);
residentProgress.MarkComplete();
}
finally
{
//Remove the folder holding all our temporary files.
ProgressManager tempFiles = new ProgressManager();
Progress.Steps.Add(new SteppedProgressManagerStep(tempFiles,
0.0f, S._("Removing temporary files...")));
fsManager.DeleteFolder(info, true);
tempFiles.MarkComplete();
//Reset the low disk space notifications
Shell.LowDiskSpaceNotificationsEnabled = lowDiskSpaceNotifications;
}
//Then clean the old file system entries
ProgressManager structureProgress = new ProgressManager();
Progress.Steps.Add(new SteppedProgressManagerStep(structureProgress,
0.05f, S._("Erasing unused directory structures...")));
fsManager.EraseDirectoryStructures(volInfo,
delegate(int currentFile, int totalFiles)
{
if (Task.Canceled)
{
throw new OperationCanceledException(S._("The task was cancelled."));
}
//Compute the progress
structureProgress.Total = totalFiles;
structureProgress.Completed = currentFile;
}
);
structureProgress.MarkComplete();
Progress = null;
}
