public T Get <T>()
{
using (new NativeMethods.ChangeErrorMode(NativeMethods.ErrorMode.FailCriticalErrors))
{
NativeMethods.WIN32_FIND_DATA win32FindData;
// Not explicitly set to be a folder.
if (!IsDirectory)
{
using (var handle = FindFirstFile(InputPath, out win32FindData))
return(null == handle
? (T)(object)null
: NewFileSystemEntryType <T>((win32FindData.dwFileAttributes & FileAttributes.Directory) != 0, null, null, InputPath, win32FindData));
}
using (var handle = FindFirstFile(InputPath, out win32FindData, true))
{
if (null == handle)
{
// InputPath might be a logical drive such as: "C:\", "D:\".
var attrs = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA();
var lastError = File.FillAttributeInfoCore(Transaction, Path.GetRegularPathCore(InputPath, GetFullPathOptions.None, false), ref attrs, false, true);
if (lastError != Win32Errors.NO_ERROR)
{
if (!ContinueOnException)
{
switch ((uint)lastError)
{
case Win32Errors.ERROR_FILE_NOT_FOUND: // FileNotFoundException.
case Win32Errors.ERROR_PATH_NOT_FOUND: // DirectoryNotFoundException.
case Win32Errors.ERROR_NOT_READY: // DeviceNotReadyException: Floppy device or network drive not ready.
case Win32Errors.ERROR_BAD_NET_NAME:
Directory.ExistsDriveOrFolderOrFile(Transaction, InputPath, IsDirectory, lastError, true, true);
break;
}
ThrowPossibleException((uint)lastError, InputPath);
}
return((T)(object)null);
}
win32FindData = new NativeMethods.WIN32_FIND_DATA
{
cFileName = Path.CurrentDirectoryPrefix,
dwFileAttributes = attrs.dwFileAttributes,
ftCreationTime = attrs.ftCreationTime,
ftLastAccessTime = attrs.ftLastAccessTime,
ftLastWriteTime = attrs.ftLastWriteTime,
nFileSizeHigh = attrs.nFileSizeHigh,
nFileSizeLow = attrs.nFileSizeLow
};
}
VerifyInstanceType(win32FindData);
}
return(NewFileSystemEntryType <T>((win32FindData.dwFileAttributes & FileAttributes.Directory) != 0, null, null, InputPath, win32FindData));
}
}
internal static void DeleteFileCore(KernelTransaction transaction, string path, bool ignoreReadOnly, PathFormat pathFormat)
{
if (null == path)
{
throw new ArgumentNullException("path");
}
if (pathFormat == PathFormat.RelativePath)
{
Path.CheckSupportedPathFormat(path, true, true);
}
var pathLp = Path.GetExtendedLengthPathCore(transaction, path, pathFormat, GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator);
// If the path points to a symbolic link, the symbolic link is deleted, not the target.
startDeleteFile:
if (!(transaction == null || !NativeMethods.IsAtLeastWindowsVista
// DeleteFile() / DeleteFileTransacted()
// 2013-01-13: MSDN confirms LongPath usage.
? NativeMethods.DeleteFile(pathLp)
: NativeMethods.DeleteFileTransacted(pathLp, transaction.SafeHandle)))
{
var lastError = Marshal.GetLastWin32Error();
switch ((uint)lastError)
{
case Win32Errors.ERROR_FILE_NOT_FOUND:
// MSDN: .NET 3.5+: If the file to be deleted does not exist, no exception is thrown.
return;
case Win32Errors.ERROR_PATH_NOT_FOUND:
// MSDN: .NET 3.5+: DirectoryNotFoundException: The specified path is invalid (for example, it is on an unmapped drive).
NativeError.ThrowException(lastError, pathLp);
return;
case Win32Errors.ERROR_SHARING_VIOLATION:
// MSDN: .NET 3.5+: IOException: The specified file is in use or there is an open handle on the file.
NativeError.ThrowException(lastError, pathLp);
break;
case Win32Errors.ERROR_ACCESS_DENIED:
var attrs = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA();
var dataInitialised = FillAttributeInfoCore(transaction, pathLp, ref attrs, false, true);
if (IsDirectory(attrs.dwFileAttributes))
{
// MSDN: .NET 3.5+: UnauthorizedAccessException: Path is a directory.
throw new UnauthorizedAccessException(string.Format(CultureInfo.InvariantCulture, "({0}) {1}",
Win32Errors.ERROR_INVALID_PARAMETER, string.Format(CultureInfo.InvariantCulture, Resources.Target_File_Is_A_Directory, pathLp)));
}
if (IsReadOnly(attrs.dwFileAttributes))
{
if (ignoreReadOnly)
{
// Reset file attributes to Normal.
SetAttributesCore(transaction, false, pathLp, FileAttributes.Normal, PathFormat.LongFullPath);
goto startDeleteFile;
}
// MSDN: .NET 3.5+: UnauthorizedAccessException: Path specified a read-only file.
throw new FileReadOnlyException(pathLp);
}
// MSDN: .NET 3.5+: UnauthorizedAccessException: The caller does not have the required permission.
if (dataInitialised == Win32Errors.ERROR_SUCCESS)
{
NativeError.ThrowException(lastError, pathLp);
}
break;
}
// MSDN: .NET 3.5+: IOException:
// The specified file is in use.
// There is an open handle on the file, and the operating system is Windows XP or earlier.
NativeError.ThrowException(lastError, pathLp);
}
}
internal static int FillAttributeInfoCore(KernelTransaction transaction, string pathLp, ref NativeMethods.WIN32_FILE_ATTRIBUTE_DATA win32AttrData, bool tryagain, bool returnErrorOnNotFound)
{
int dataInitialised = (int)Win32Errors.ERROR_SUCCESS;
#region Try Again
// Someone has a handle to the file open, or other error.
if (tryagain)
{
NativeMethods.WIN32_FIND_DATA findData;
// ChangeErrorMode is for the Win32 SetThreadErrorMode() method, used to suppress possible pop-ups.
using (new NativeMethods.ChangeErrorMode(NativeMethods.ErrorMode.FailCriticalErrors))
{
bool error = false;
SafeFindFileHandle handle = transaction == null || !NativeMethods.IsAtLeastWindowsVista
// FindFirstFileEx() / FindFirstFileTransacted()
// 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.
// 2013-01-13: MSDN confirms LongPath usage.
// A trailing backslash is not allowed.
? NativeMethods.FindFirstFileEx(Path.RemoveTrailingDirectorySeparator(pathLp, false), NativeMethods.FindexInfoLevels, out findData, NativeMethods.FINDEX_SEARCH_OPS.SearchNameMatch, IntPtr.Zero, NativeMethods.LargeCache)
: NativeMethods.FindFirstFileTransacted(Path.RemoveTrailingDirectorySeparator(pathLp, false), NativeMethods.FindexInfoLevels, out findData, NativeMethods.FINDEX_SEARCH_OPS.SearchNameMatch, IntPtr.Zero, NativeMethods.LargeCache, transaction.SafeHandle);
try
{
if (handle != null && handle.IsInvalid)
{
error = true;
dataInitialised = Marshal.GetLastWin32Error();
if (dataInitialised == Win32Errors.ERROR_FILE_NOT_FOUND ||
dataInitialised == Win32Errors.ERROR_PATH_NOT_FOUND ||
dataInitialised == Win32Errors.ERROR_NOT_READY) // Floppy device not ready.
{
if (!returnErrorOnNotFound)
{
// Return default value for backward compatibility
dataInitialised = (int)Win32Errors.ERROR_SUCCESS;
win32AttrData.dwFileAttributes = (FileAttributes)(-1);
}
}
return(dataInitialised);
}
}
finally
{
try
{
if (handle != null)
{
handle.Close();
}
}
catch
{
// If we're already returning an error, don't throw another one.
if (!error)
{
NativeError.ThrowException(dataInitialised, pathLp);
}
}
}
}
// Copy the attribute information.
win32AttrData = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA(findData);
}
#endregion // Try Again
else
{
using (new NativeMethods.ChangeErrorMode(NativeMethods.ErrorMode.FailCriticalErrors))
{
if (!(transaction == null || !NativeMethods.IsAtLeastWindowsVista
// GetFileAttributesEx() / GetFileAttributesTransacted()
// 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.
// 2013-01-13: MSDN confirms LongPath usage.
? NativeMethods.GetFileAttributesEx(pathLp, NativeMethods.GetFileExInfoLevels.GetFileExInfoStandard, out win32AttrData)
: NativeMethods.GetFileAttributesTransacted(pathLp, NativeMethods.GetFileExInfoLevels.GetFileExInfoStandard, out win32AttrData, transaction.SafeHandle)))
{
dataInitialised = Marshal.GetLastWin32Error();
if (dataInitialised != Win32Errors.ERROR_FILE_NOT_FOUND &&
dataInitialised != Win32Errors.ERROR_PATH_NOT_FOUND &&
dataInitialised != Win32Errors.ERROR_NOT_READY) // Floppy device not ready.
{
// In case someone latched onto the file. Take the perf hit only for failure.
return(FillAttributeInfoCore(transaction, pathLp, ref win32AttrData, true, returnErrorOnNotFound));
}
if (!returnErrorOnNotFound)
{
// Return default value for backward compbatibility.
dataInitialised = (int)Win32Errors.ERROR_SUCCESS;
win32AttrData.dwFileAttributes = (FileAttributes)(-1);
}
}
}
}
return(dataInitialised);
}
internal static void DeleteDirectoryCore(FileSystemEntryInfo fileSystemEntryInfo, KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly, bool continueOnNotExist, PathFormat pathFormat)
{
#region Setup
if (pathFormat == PathFormat.RelativePath)
{
Path.CheckSupportedPathFormat(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.GetFileSystemEntryInfoCore(true, transaction, Path.GetExtendedLengthPathCore(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.DeleteVolumeMountPointCore(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 (var fsei in EnumerateFileSystemEntryInfosCore <FileSystemEntryInfo>(transaction, pathLp, Path.WildcardStarMatchAll, DirectoryEnumerationOptions.FilesAndFolders, PathFormat.LongFullPath))
{
if (fsei.IsDirectory)
{
DeleteDirectoryCore(fsei, transaction, null, true, ignoreReadOnly, true, PathFormat.LongFullPath);
}
else
{
File.DeleteFileCore(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:
// MSDN: .NET 3.5+: IOException: The directory specified by path is not an empty directory.
throw new DirectoryNotEmptyException(pathLp);
case Win32Errors.ERROR_DIRECTORY:
// MSDN: .NET 3.5+: DirectoryNotFoundException: Path refers to a file instead of a directory.
if (File.ExistsCore(false, transaction, pathLp, PathFormat.LongFullPath))
{
throw new DirectoryNotFoundException(string.Format(CultureInfo.CurrentCulture, "({0}) {1}", Win32Errors.ERROR_INVALID_PARAMETER, string.Format(CultureInfo.CurrentCulture, Resources.Target_Directory_Is_A_File, 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:
var data = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA();
int dataInitialised = File.FillAttributeInfoCore(transaction, pathLp, ref data, false, true);
if (data.dwFileAttributes != (FileAttributes)(-1))
{
if ((data.dwFileAttributes & FileAttributes.ReadOnly) != 0)
{
// MSDN: .NET 3.5+: IOException: The directory specified by path is read-only.
if (ignoreReadOnly)
{
// Reset directory attributes.
File.SetAttributesCore(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
}
internal static int FillAttributeInfoCore(KernelTransaction transaction, string pathLp, ref NativeMethods.WIN32_FILE_ATTRIBUTE_DATA win32AttrData, bool tryAgain, bool returnErrorOnNotFound)
{
var lastError = (int)Win32Errors.ERROR_SUCCESS;
#region Try Again
// Someone has a handle to the file open, or other error.
if (tryAgain)
{
NativeMethods.WIN32_FIND_DATA win32FindData;
using (new NativeMethods.ChangeErrorMode(NativeMethods.ErrorMode.FailCriticalErrors))
{
var handle = FileSystemInfo.FindFirstFileNative(transaction, pathLp, NativeMethods.FindexInfoLevel, NativeMethods.FINDEX_SEARCH_OPS.SearchNameMatch, NativeMethods.UseLargeCache, out lastError, out win32FindData);
if (null == handle)
{
switch ((uint)lastError)
{
case Win32Errors.ERROR_INVALID_NAME:
case Win32Errors.ERROR_FILE_NOT_FOUND: // On files.
case Win32Errors.ERROR_PATH_NOT_FOUND: // On folders.
case Win32Errors.ERROR_NOT_READY: // DeviceNotReadyException: Floppy device or network drive not ready.
if (!returnErrorOnNotFound)
{
// Return default value for backward compatibility.
lastError = (int)Win32Errors.ERROR_SUCCESS;
win32AttrData.dwFileAttributes = NativeMethods.InvalidFileAttributes;
}
break;
}
return(lastError);
}
}
// Copy the attribute information.
win32AttrData = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA(win32FindData);
}
#endregion // Try Again
else
{
using (new NativeMethods.ChangeErrorMode(NativeMethods.ErrorMode.FailCriticalErrors))
{
if (!(null == transaction || !NativeMethods.IsAtLeastWindowsVista
// GetFileAttributesEx() / GetFileAttributesTransacted()
// 2013-01-13: MSDN confirms LongPath usage.
? NativeMethods.GetFileAttributesEx(pathLp, NativeMethods.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, out win32AttrData)
: NativeMethods.GetFileAttributesTransacted(pathLp, NativeMethods.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, out win32AttrData, transaction.SafeHandle)))
{
lastError = Marshal.GetLastWin32Error();
switch ((uint)lastError)
{
case Win32Errors.ERROR_FILE_NOT_FOUND: // On files.
case Win32Errors.ERROR_PATH_NOT_FOUND: // On folders.
case Win32Errors.ERROR_NOT_READY: // DeviceNotReadyException: Floppy device or network drive not ready.
// In case someone latched onto the file. Take the perf hit only for failure.
return(FillAttributeInfoCore(transaction, pathLp, ref win32AttrData, true, returnErrorOnNotFound));
}
if (!returnErrorOnNotFound)
{
// Return default value for backward compatibility.
lastError = (int)Win32Errors.ERROR_SUCCESS;
win32AttrData.dwFileAttributes = NativeMethods.InvalidFileAttributes;
}
}
}
}
return(lastError);
}
internal static void TransferTimestampsCore(bool isFolder, KernelTransaction transaction, string sourcePath, string destinationPath, PathFormat pathFormat)
{
NativeMethods.WIN32_FILE_ATTRIBUTE_DATA attrs = GetAttributesExCore <NativeMethods.WIN32_FILE_ATTRIBUTE_DATA>(transaction, sourcePath, pathFormat, true);
SetFsoDateTimeCore(isFolder, transaction, destinationPath, DateTime.FromFileTimeUtc(attrs.ftCreationTime), DateTime.FromFileTimeUtc(attrs.ftLastAccessTime), DateTime.FromFileTimeUtc(attrs.ftLastWriteTime), false, pathFormat);
}
private static void DeleteDirectoryCore(KernelTransaction transaction, string pathLp, bool ignoreReadOnly, bool continueOnNotFound)
{
startRemoveDirectory:
var success = transaction == null || !NativeMethods.IsAtLeastWindowsVista
// RemoveDirectory() / RemoveDirectoryTransacted()
// 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);
var lastError = Marshal.GetLastWin32Error();
if (!success)
{
switch ((uint)lastError)
{
case Win32Errors.ERROR_DIR_NOT_EMPTY:
// MSDN: .NET 3.5+: IOException: The directory specified by path is not an empty directory.
throw new DirectoryNotEmptyException(pathLp, true);
case Win32Errors.ERROR_DIRECTORY:
// MSDN: .NET 3.5+: DirectoryNotFoundException: Path refers to a file instead of a directory.
if (File.ExistsCore(transaction, false, pathLp, PathFormat.LongFullPath))
{
throw new DirectoryNotFoundException(string.Format(CultureInfo.InvariantCulture, "({0}) {1}", lastError, string.Format(CultureInfo.InvariantCulture, Resources.Target_Directory_Is_A_File, pathLp)));
}
break;
case Win32Errors.ERROR_PATH_NOT_FOUND:
if (continueOnNotFound)
{
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:
var attrs = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA();
var dataInitialised = File.FillAttributeInfoCore(transaction, pathLp, ref attrs, false, true);
if (File.IsReadOnly(attrs.dwFileAttributes))
{
// MSDN: .NET 3.5+: IOException: The directory specified by path is read-only.
if (ignoreReadOnly)
{
// Reset directory attributes to Normal.
File.SetAttributesCore(transaction, true, pathLp, FileAttributes.Normal, PathFormat.LongFullPath);
goto startRemoveDirectory;
}
// MSDN: .NET 3.5+: IOException: The directory is read-only.
throw new DirectoryReadOnlyException(pathLp);
}
// MSDN: .NET 3.5+: UnauthorizedAccessException: The caller does not have the required permission.
if (dataInitialised == Win32Errors.ERROR_SUCCESS)
{
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);
}
}
