// checks whether the mode is the target mode.
	isSpecificMode := func(mode, targetMode os.FileMode) bool {
		return mode&targetMode == targetMode
	}

	mode := info.Mode()
	if mode.IsDir() {
		return FileTypeDirectory, nil
	} else if mode.IsRegular() {
		return FileTypeFile, nil
	} else if isSpecificMode(mode, os.ModeSocket) {
		return FileTypeSocket, nil
	} else if isSpecificMode(mode, os.ModeDevice) {