#!/usr/bin/perl -w
use strict;

my %new_resolvers = (
   'dns-one'          => [
      "127.0.0.1\tdns-apple"
    , "127.0.0.2\tdns-banana"
    , "127.0.0.3\tdns-shoe"
    ]
    ,  'dns-extern'    => [ 
    sub {
       my $ip = shift or die "you need to pass in IP address";
       my @array;
       open ( PIPE, "./get_resolvers_for_client.sh|" ) 
          or die __FILE__ . " [" . __LINE__ . "] could not open get_resolvers_for_client.sh:$!";
       while ( <PIPE> ) {
          chomp;
          last if /not a one of our IP addresses/;
          push ( @array, $_ );
       }
       return reverse @array;
    }
    ]
);

for my $dns_server ( keys %new_resolvers )  {
   print "getting new resolvers for dns server $dns_server\n";
   my $resolvers           = join "\n", @{$new_resolvers{$dns_server}};
   print "$resolvers\n\n";
}