code: func GetSysctl(sysctl string) (int, error) {
  	data, err := ioutil.ReadFile(path.Join(sysctlBase, sysctl))
  	if err != nil {
  		return -1, err
  	}
  	val, err := strconv.Atoi(strings.Trim(string(data), " \n"))
  	if err != nil {
  		return -1, err
  	}
  	return val, nil
  }
docs: // GetSysctl returns the value for the specified sysctl setting