gistfile1

#!/usr/bin/ruby
require "socket"
parts = Socket.gethostname.split(/\./);
host = parts.shift;
domain = parts.join('.');
soas = []
require 'resolv'
res = Resolv::DNS::new('/etc/resolv.conf')
p [ 'getting nameservers for ', domain ].join
nameservers = res.getresources( domain, Resolv::DNS::Resource::IN::NS)
nameservers.each { 
                   |x| 
                   soas.push(Resolv.getaddress(x.name.to_s) )
                  }
ares = Resolv::DNS::new( { :nameserver => soas, :search => [ domain ], :ndots => 1 } )
ares.each_resource(['loghost',domain].join('.'), Resolv::DNS::Resource::IN::ANY) do |r| 
  if r.kind_of?(Resolv::DNS::Resource::IN::MX) then
    p [ r.preference.to_s, " ", r.exchange.to_s ].join
  elsif r.kind_of?(Resolv::DNS::Resource::NS) then
    p r.name.to_s
  else
    p r.name.to_s
  end
end