// Returns 0 on success, otherwise a Win32 error code. Note that
// classes should use -1 as the uninitialized state for dataInitialized.
internal static int FillAttributeInfo(String path, ref Win32Native.WIN32_FILE_ATTRIBUTE_DATA data, bool tryagain, bool returnErrorOnNotFound)
{
int dataInitialised = 0;
if (tryagain) // someone has a handle to the file open, or other error
{
Win32Native.WIN32_FIND_DATA findData;
findData = new Win32Native.WIN32_FIND_DATA();
// Remove trialing slash since this can cause grief to FindFirstFile. You will get an invalid argument error
String tempPath = path.TrimEnd(new char[] { Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar });
#if !PLATFORM_UNIX
// For floppy drives, normally the OS will pop up a dialog saying
// there is no disk in drive A:, please insert one. We don't want that.
// SetThreadErrorMode will let us disable this, but we should set the error
// mode back, since this may have wide-ranging effects.
uint oldMode;
bool errorModeSuccess = Interop.Kernel32.SetThreadErrorMode(Interop.Kernel32.SEM_FAILCRITICALERRORS, out oldMode);
try
{
#endif
bool error = false;
SafeFindHandle handle = Win32Native.FindFirstFile(tempPath, findData);
try
{
if (handle.IsInvalid)
{
error = true;
dataInitialised = Marshal.GetLastWin32Error();
if (dataInitialised == Win32Native.ERROR_FILE_NOT_FOUND ||
dataInitialised == Win32Native.ERROR_PATH_NOT_FOUND ||
dataInitialised == Win32Native.ERROR_NOT_READY) // floppy device not ready
{
if (!returnErrorOnNotFound)
{
// Return default value for backward compatibility
dataInitialised = 0;
data.fileAttributes = -1;
}
}
return(dataInitialised);
}
}
finally
{
// Close the Win32 handle
try
{
handle.Close();
}
catch
{
// if we're already returning an error, don't throw another one.
if (!error)
{
Debug.Assert(false, "File::FillAttributeInfo - FindClose failed!");
throw Win32Marshal.GetExceptionForLastWin32Error();
}
}
}
#if !PLATFORM_UNIX
}
finally
{
if (errorModeSuccess)
{
Interop.Kernel32.SetThreadErrorMode(oldMode, out oldMode);
}
}
#endif
// Copy the information to data
data.PopulateFrom(findData);
}
else
{
bool success = false;
#if !PLATFORM_UNIX
// For floppy drives, normally the OS will pop up a dialog saying
// there is no disk in drive A:, please insert one. We don't want that.
// SetThreadErrorMode will let us disable this, but we should set the error
// mode back, since this may have wide-ranging effects.
uint oldMode;
bool errorModeSuccess = Interop.Kernel32.SetThreadErrorMode(Interop.Kernel32.SEM_FAILCRITICALERRORS, out oldMode);
try
{
#endif
success = Win32Native.GetFileAttributesEx(path, GetFileExInfoStandard, ref data);
#if !PLATFORM_UNIX
}
finally
{
if (errorModeSuccess)
{
Interop.Kernel32.SetThreadErrorMode(oldMode, out oldMode);
}
}
#endif
if (!success)
{
dataInitialised = Marshal.GetLastWin32Error();
if (dataInitialised != Win32Native.ERROR_FILE_NOT_FOUND &&
dataInitialised != Win32Native.ERROR_PATH_NOT_FOUND &&
dataInitialised != Win32Native.ERROR_NOT_READY) // floppy device not ready
{
// In case someone latched onto the file. Take the perf hit only for failure
return(FillAttributeInfo(path, ref data, true, returnErrorOnNotFound));
}
else
{
if (!returnErrorOnNotFound)
{
// Return default value for backward compbatibility
dataInitialised = 0;
data.fileAttributes = -1;
}
}
}
}
return(dataInitialised);
}
