config/env/env.go
func MSetsysForUid(id int, keys, values []string) error {
	if !_IS_ROOT {
		return ErrNoRoot
	}

	_settings, err := getSettingsForUid(id)
	if err != nil {
		return err
	}
	return _MSet(_settings.global, keys, values)
}
func MSetsysForUid(id int, keys, values []string) error {
	if !_IS_ROOT {
		return ErrNoRoot
	}

	_settings, err := getSettingsForUid(id)
	if err != nil {
		return err
	}
	return _MSet(_settings.global, keys, values)
}
// MSetsysForUid sets multiple values of the environment variables named by the
// keys that affects the system as a whole. You must be Root.
// It returns an error, if any.