class Inspec::Resources::LinuxInterface

def interface_info(iface)
  # will return "[mtu]\n1500\n[type]\n1"
  cmd = inspec.command("find /sys/class/net/#{iface}/ -maxdepth 1 -type f -exec sh -c 'echo \"[$(basename {})]\"; cat {} || echo -n' \\;")
  return nil if cmd.exit_status.to_i != 0
  # parse values, we only recieve values, therefore we threat them as keys
  params = SimpleConfig.new(cmd.stdout.chomp).params
  # abort if we got an empty result-set
  return nil if params.empty?
  # parse state
  state = false
  if params.key?('operstate')
    operstate, _value = params['operstate'].first
    state = operstate == 'up'
  end
  # parse speed
  speed = nil
  if params.key?('speed')
    speed, _value = params['speed'].first
    speed = convert_to_i(speed)
  end
  {
    name: iface,
    up: state,
    speed: speed,
  }
end