private SafeFindFileHandle FindFirstFile(string pathLp, out NativeMethods.WIN32_FIND_DATA win32FindData, bool suppressException = false)
{
int lastError;
var searchOption = null != FileSystemObjectType && (bool)FileSystemObjectType ? NativeMethods.FINDEX_SEARCH_OPS.SearchLimitToDirectories : NativeMethods.FINDEX_SEARCH_OPS.SearchNameMatch;
var handle = FileSystemInfo.FindFirstFileNative(Transaction, pathLp, FindExInfoLevel, searchOption, LargeCache, out lastError, out win32FindData);
if (!suppressException && !ContinueOnException)
{
if (null == handle)
{
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.
Directory.ExistsDriveOrFolderOrFile(Transaction, pathLp, IsDirectory, lastError, true, true);
break;
}
ThrowPossibleException((uint)lastError, pathLp);
}
//// When the handle is null and we are still here, it means the ErrorHandler is active, preventing the Exception from being thrown.
//if (null != handle)
// VerifyInstanceType(win32FindData);
}
return(handle);
}
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);
}