class Inspec::Resources::UnixHostProvider

def resolve_with_getent(hostname)
  cmd = inspec.command("getent ahosts #{hostname}")
  return nil unless cmd.exit_status.to_i == 0
  # getent ahosts output is formatted like so:
  # $ getent ahosts www.google.com
  # 172.217.8.4     STREAM www.google.com
  # 172.217.8.4     DGRAM
  # 172.217.8.4     RAW
  # 2607:f8b0:4004:803::2004 STREAM
  # 2607:f8b0:4004:803::2004 DGRAM
  # 2607:f8b0:4004:803::2004 RAW
  addresses = []
  cmd.stdout.lines.each do |line|
    ip, = line.split(/\s+/, 2)
    next unless ip.match(Resolv::IPv4::Regex) || ip.match(Resolv::IPv6::Regex)
    addresses << ip unless addresses.include?(ip)
  end
  addresses
end