public static void Move(string sourceDirName, string destDirName)
{
// sourceDirName and destDirName validation in Path.GetFullPath()
sourceDirName = Path.GetFullPath(sourceDirName);
destDirName = Path.GetFullPath(destDirName);
bool tryCopyAndDelete = false;
Object srcRecord = FileSystemManager.AddToOpenList(sourceDirName);
try
{
// Make sure sourceDir is actually a directory
if (!Exists(sourceDirName))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.DirectoryNotFound);
}
// If Move() returns false, we'll try doing copy and delete to accomplish the move
tryCopyAndDelete = !NativeIO.Move(sourceDirName, destDirName);
}
finally
{
FileSystemManager.RemoveFromOpenList(srcRecord);
}
if (tryCopyAndDelete)
{
RecursiveCopyAndDelete(sourceDirName, destDirName);
}
}
// Moves a specified file to a new location and potentially a new file name.
// This method does work across volumes.
//
// The caller must have certain FileIOPermissions. The caller must
// have Read and Write permission to
// sourceFileName and Write
// permissions to destFileName.
//
public static void Move(String sourceFileName, String destFileName)
{
// sourceFileName and destFileName validation in Path.GetFullPath()
sourceFileName = Path.GetFullPath(sourceFileName);
destFileName = Path.GetFullPath(destFileName);
bool tryCopyAndDelete = false;
// We only need to lock the source, not the dest because if dest is taken
// Move() will failed at the driver's level anyway. (there will be no conflict even if
// another thread is creating dest, as only one of the operations will succeed --
// the native calls are atomic)
Object srcRecord = FileSystemManager.AddToOpenList(sourceFileName);
try
{
if (!Exists(sourceFileName))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.FileNotFound);
}
//We'll try copy and deleting if Move returns false
tryCopyAndDelete = !NativeIO.Move(sourceFileName, destFileName);
}
finally
{
FileSystemManager.RemoveFromOpenList(srcRecord);
}
if (tryCopyAndDelete)
{
Copy(sourceFileName, destFileName, false, true);
}
}
private static void RecursiveCopyAndDelete(String sourceDirName, String destDirName)
{
String[] files;
int filesCount, i;
int relativePathIndex = sourceDirName.Length + 1; // relative path starts after the sourceDirName and a path seperator
// We have to make sure no one else can modify it (for example, delete the directory and
// create a file of the same name) while we're moving
Object recordSrc = FileSystemManager.AddToOpenList(sourceDirName);
try
{
// Make sure sourceDir is actually a directory
if (!Exists(sourceDirName))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.DirectoryNotFound);
}
// Make sure destDir does not yet exist
if (Exists(destDirName))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.PathAlreadyExists);
}
NativeIO.CreateDirectory(destDirName);
files = Directory.GetFiles(sourceDirName);
filesCount = files.Length;
for (i = 0; i < filesCount; i++)
{
File.Copy(files[i], Path.Combine(destDirName, files[i].Substring(relativePathIndex)), false, true);
}
files = Directory.GetDirectories(sourceDirName);
filesCount = files.Length;
for (i = 0; i < filesCount; i++)
{
RecursiveCopyAndDelete(files[i], Path.Combine(destDirName, files[i].Substring(relativePathIndex)));
}
NativeIO.Delete(sourceDirName);
}
finally
{
FileSystemManager.RemoveFromOpenList(recordSrc);
}
}
// Deletes a file. The file specified by the designated path is deleted.
// If the file does not exist, Delete succeeds without throwing
// an exception.
//
// On NT, Delete will fail for a file that is open for normal I/O
// or a file that is memory mapped. On Win95, the file will be
// deleted irregardless of whether the file is being used.
//
// Your application must have Delete permission to the target file.
//
public static void Delete(String path)
{
// path validation in Path.GetFullPath()
path = Path.GetFullPath(path);
string folderPath = Path.GetDirectoryName(path);
// We have to make sure no one else has the file opened, and no one else can modify it when we're deleting
Object record = FileSystemManager.AddToOpenList(path);
try
{
uint attributes = NativeIO.GetAttributes(folderPath);
/// If the folder does not exist or invalid we throw DirNotFound Exception (same as desktop).
if (attributes == 0xFFFFFFFF)
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.DirectoryNotFound);
}
/// Folder exists, lets verify whether the file itself exists.
attributes = NativeIO.GetAttributes(path);
if (attributes == 0xFFFFFFFF)
{
// No-op on file not found
return;
}
if ((attributes & (uint)(FileAttributes.Directory | FileAttributes.ReadOnly)) != 0)
{
/// it's a readonly file or an directory
throw new IOException("", (int)IOException.IOExceptionErrorCode.UnauthorizedAccess);
}
NativeIO.Delete(path);
}
finally
{
// regardless of what happened, we need to release the file when we're done
FileSystemManager.RemoveFromOpenList(record);
}
}
public FileStream(String path, FileMode mode, FileAccess access, FileShare share, int bufferSize)
{
// This will perform validation on path
_fileName = Path.GetFullPath(path);
// make sure mode, access, and share are within range
if (mode < FileMode.CreateNew || mode > FileMode.Append ||
access < FileAccess.Read || access > FileAccess.ReadWrite ||
share < FileShare.None || share > FileShare.ReadWrite)
{
throw new ArgumentOutOfRangeException();
}
// Get wantsRead and wantsWrite from access, note that they cannot both be false
bool wantsRead = (access & FileAccess.Read) == FileAccess.Read;
bool wantsWrite = (access & FileAccess.Write) == FileAccess.Write;
// You can't open for readonly access (wantsWrite == false) when
// mode is CreateNew, Create, Truncate or Append (when it's not Open or OpenOrCreate)
if (mode != FileMode.Open && mode != FileMode.OpenOrCreate && !wantsWrite)
{
throw new ArgumentException();
}
// We need to register the share information prior to the actual file open call (the NativeFileStream ctor)
// so subsequent file operation on the same file will behave correctly
_fileRecord = FileSystemManager.AddToOpenList(_fileName, (int)access, (int)share);
try
{
uint attributes = NativeIO.GetAttributes(_fileName);
bool exists = (attributes != 0xFFFFFFFF);
bool isReadOnly = (exists) ? (((FileAttributes)attributes) & FileAttributes.ReadOnly) == FileAttributes.ReadOnly : false;
// If the path specified is an existing directory, fail
if (exists && ((((FileAttributes)attributes) & FileAttributes.Directory) == FileAttributes.Directory))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.UnauthorizedAccess);
}
// The seek limit is 0 (the beginning of the file) for all modes except Append
_seekLimit = 0;
switch (mode)
{
case FileMode.CreateNew: // if the file exists, IOException is thrown
if (exists)
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.PathAlreadyExists);
}
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
break;
case FileMode.Create: // if the file exists, it should be overwritten
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
if (exists)
{
_nativeFileStream.SetLength(0);
}
break;
case FileMode.Open: // if the file does not exist, IOException/FileNotFound is thrown
if (!exists)
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.FileNotFound);
}
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
break;
case FileMode.OpenOrCreate: // if the file does not exist, it is created
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
break;
case FileMode.Truncate: // the file would be overwritten. if the file does not exist, IOException/FileNotFound is thrown
if (!exists)
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.FileNotFound);
}
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
_nativeFileStream.SetLength(0);
break;
case FileMode.Append: // Opens the file if it exists and seeks to the end of the file. Append can only be used in conjunction with FileAccess.Write
// Attempting to seek to a position before the end of the file will throw an IOException and any attempt to read fails and throws an NotSupportedException
if (access != FileAccess.Write)
{
throw new ArgumentException();
}
_nativeFileStream = new NativeFileStream(_fileName, bufferSize);
_seekLimit = _nativeFileStream.Seek(0, (uint)SeekOrigin.End);
break;
// We've already checked the mode value previously, so no need for default
//default:
// throw new ArgumentOutOfRangeException();
}
// Now that we have a valid NativeFileStream, we add it to the FileRecord, so it could gets clean up
// in case an eject or force format
_fileRecord.NativeFileStream = _nativeFileStream;
// Retrive the filesystem capabilities
_nativeFileStream.GetStreamProperties(out _canRead, out _canWrite, out _canSeek);
// If the file is readonly, regardless of the filesystem capability, we'll turn off write
if (isReadOnly)
{
_canWrite = false;
}
// Make sure the requests (wantsRead / wantsWrite) matches the filesystem capabilities (canRead / canWrite)
if ((wantsRead && !_canRead) || (wantsWrite && !_canWrite))
{
throw new IOException("", (int)IOException.IOExceptionErrorCode.UnauthorizedAccess);
}
// finally, adjust the _canRead / _canWrite to match the requests
if (!wantsWrite)
{
_canWrite = false;
}
else if (!wantsRead)
{
_canRead = false;
}
}
catch
{
// something went wrong, clean up and re-throw the exception
if (_nativeFileStream != null)
{
_nativeFileStream.Close();
}
FileSystemManager.RemoveFromOpenList(_fileRecord);
throw;
}
}