internal static void DeleteEmptySubdirectoriesInternal(FileSystemEntryInfo fileSystemEntryInfo, KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly, bool initialize, PathFormat pathFormat)
{
#region Setup
if (pathFormat == PathFormat.RelativePath)
{
Path.CheckValidPath(path, true, true);
}
if (fileSystemEntryInfo == null)
{
if (!File.ExistsInternal(true, transaction, path, pathFormat))
{
NativeError.ThrowException(Win32Errors.ERROR_PATH_NOT_FOUND, path);
}
fileSystemEntryInfo = File.GetFileSystemEntryInfoInternal(transaction,
Path.GetExtendedLengthPathInternal(transaction, path, pathFormat, GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator | GetFullPathOptions.FullCheck)
, false, pathFormat);
}
if (fileSystemEntryInfo == null)
{
throw new ArgumentNullException("path");
}
string pathLp = fileSystemEntryInfo.LongFullPath;
#endregion // Setup
// Ensure path is a directory.
if (!fileSystemEntryInfo.IsDirectory)
{
throw new IOException(String.Format(CultureInfo.CurrentCulture, Resources.FileExistsWithSameNameSpecifiedByPath, pathLp));
}
var dirEnumOptions = DirectoryEnumerationOptions.Folders;
if (recursive)
{
dirEnumOptions |= DirectoryEnumerationOptions.Recursive;
}
foreach (var fsei in EnumerateFileSystemEntryInfosInternal <FileSystemEntryInfo>(transaction, pathLp, Path.WildcardStarMatchAll, dirEnumOptions, PathFormat.LongFullPath))
{
DeleteEmptySubdirectoriesInternal(fsei, transaction, null, recursive, ignoreReadOnly, false, PathFormat.LongFullPath);
}
if (!EnumerateFileSystemEntryInfosInternal <string>(transaction, pathLp, Path.WildcardStarMatchAll, DirectoryEnumerationOptions.FilesAndFolders, PathFormat.LongFullPath).Any())
{
// Prevent deleting path itself.
if (!initialize)
{
DeleteDirectoryInternal(fileSystemEntryInfo, transaction, null, false, ignoreReadOnly, true, true, PathFormat.LongFullPath);
}
}
}
protected void RefreshEntryInfo()
{
_entryInfo = File.GetFileSystemEntryInfoInternal(IsDirectory, Transaction, LongFullName, true, null);
if (_entryInfo == null)
{
DataInitialised = -1;
}
else
{
DataInitialised = 0;
Win32AttributeData = new NativeMethods.Win32FileAttributeData(_entryInfo.Win32FindData);
}
}
internal static void DeleteDirectoryInternal(FileSystemEntryInfo fileSystemEntryInfo, KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly, bool requireEmpty, bool continueOnNotExist, PathFormat pathFormat)
{
#region Setup
if (pathFormat == PathFormat.RelativePath)
Path.CheckValidPath(path, true, true);
if (fileSystemEntryInfo == null)
{
// MSDN: .NET 3.5+: DirectoryNotFoundException:
// Path does not exist or could not be found.
// Path refers to a file instead of a directory.
// The specified path is invalid (for example, it is on an unmapped drive).
fileSystemEntryInfo = File.GetFileSystemEntryInfoInternal(transaction,
Path.GetExtendedLengthPathInternal(transaction, path, pathFormat, GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator),
continueOnNotExist, pathFormat);
}
if (fileSystemEntryInfo == null)
return;
string pathLp = fileSystemEntryInfo.LongFullPath;
#endregion // Setup
// Do not follow mount points nor symbolic links, but do delete the reparse point itself.
// If directory is reparse point, disable recursion.
if (recursive && fileSystemEntryInfo.IsReparsePoint)
recursive = false;
// Check to see if this is a mount point, and unmount it.
if (fileSystemEntryInfo.IsMountPoint)
{
int lastError = Volume.DeleteVolumeMountPointInternal(pathLp, true);
if (lastError != Win32Errors.ERROR_SUCCESS && lastError != Win32Errors.ERROR_PATH_NOT_FOUND)
NativeError.ThrowException(lastError, pathLp);
// Now it is safe to delete the actual directory.
}
if (recursive)
{
// Enumerate all file system objects.
foreach (FileSystemEntryInfo fsei in EnumerateFileSystemEntryInfosInternal<FileSystemEntryInfo>(transaction, pathLp, Path.WildcardStarMatchAll, DirectoryEnumerationOptions.FilesAndFolders, PathFormat.LongFullPath))
{
if (fsei.IsDirectory)
DeleteDirectoryInternal(fsei, transaction, null, true, ignoreReadOnly, requireEmpty, true, PathFormat.LongFullPath);
else
File.DeleteFileInternal(transaction, fsei.LongFullPath, ignoreReadOnly, PathFormat.LongFullPath);
}
}
#region Remove
startRemoveDirectory:
if (!(transaction == null || !NativeMethods.IsAtLeastWindowsVista
// RemoveDirectory() / RemoveDirectoryTransacted()
// In the ANSI version of this function, the name is limited to MAX_PATH characters.
// To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
// 2014-09-09: MSDN confirms LongPath usage.
// RemoveDirectory on a symbolic link will remove the link itself.
? NativeMethods.RemoveDirectory(pathLp)
: NativeMethods.RemoveDirectoryTransacted(pathLp, transaction.SafeHandle)))
{
int lastError = Marshal.GetLastWin32Error();
switch ((uint)lastError)
{
case Win32Errors.ERROR_DIR_NOT_EMPTY:
if (requireEmpty)
// MSDN: .NET 3.5+: IOException: The directory specified by path is not an empty directory.
throw new DirectoryNotEmptyException(pathLp);
goto startRemoveDirectory;
case Win32Errors.ERROR_DIRECTORY:
// MSDN: .NET 3.5+: DirectoryNotFoundException: Path refers to a file instead of a directory.
if (File.ExistsInternal(false, transaction, pathLp, PathFormat.LongFullPath))
throw new DirectoryNotFoundException(String.Format(CultureInfo.CurrentCulture, "({0}) {1}",
Win32Errors.ERROR_INVALID_PARAMETER, String.Format(CultureInfo.CurrentCulture, Resources.FileExistsWithSameNameSpecifiedByPath, pathLp)));
break;
case Win32Errors.ERROR_PATH_NOT_FOUND:
if (continueOnNotExist)
return;
break;
case Win32Errors.ERROR_SHARING_VIOLATION:
// MSDN: .NET 3.5+: IOException: The directory is being used by another process or there is an open handle on the directory.
NativeError.ThrowException(lastError, pathLp);
break;
case Win32Errors.ERROR_ACCESS_DENIED:
NativeMethods.Win32FileAttributeData data = new NativeMethods.Win32FileAttributeData();
int dataInitialised = File.FillAttributeInfoInternal(transaction, pathLp, ref data, false, true);
if (data.FileAttributes != (FileAttributes)(-1))
{
if ((data.FileAttributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
{
// MSDN: .NET 3.5+: IOException: The directory specified by path is read-only.
if (ignoreReadOnly)
{
// Reset directory attributes.
File.SetAttributesInternal(true, transaction, pathLp, FileAttributes.Normal, true, PathFormat.LongFullPath);
goto startRemoveDirectory;
}
// MSDN: .NET 3.5+: IOException: The directory is read-only.
throw new DirectoryReadOnlyException(pathLp);
}
}
if (dataInitialised == Win32Errors.ERROR_SUCCESS)
// MSDN: .NET 3.5+: UnauthorizedAccessException: The caller does not have the required permission.
NativeError.ThrowException(lastError, pathLp);
break;
}
// MSDN: .NET 3.5+: IOException:
// A file with the same name and location specified by path exists.
// The directory specified by path is read-only, or recursive is false and path is not an empty directory.
// The directory is the application's current working directory.
// The directory contains a read-only file.
// The directory is being used by another process.
NativeError.ThrowException(lastError, pathLp);
}
#endregion // Remove
}
