gistfile1.txt

#!/usr/bin/ruby

rev_10_file = File.open('rev_10.rev', 'a')
rev_172_file = File.new('rev_172.txt', 'w+')
rev_192_file = File.new("rev_192.txt", "w+")

Dir['/Users/andybaxter/bind/*.com'].each do |filename|
  File.open(filename, 'r+').readlines.each do |line|
    domain = line.split.first
    ip = line.split.last
    reversed_ip = ip.split('.').reverse.join('.')
    
    if ip.include? "10."
      rev_10_file.puts "#{reversed_ip}.in-addr.arpa. 60 IN PTR #{domain}"
    elsif ip.include? "172."
      rev_172_file.puts "#{reversed_ip}.in-addr.arpa. 60 IN PTR #{domain}"
    else ip.include? "192."
      rev_192_file.puts "#{reversed_ip}.in-addr.arpa. 60 IN PTR #{domain}"
    end
  end
end