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#!/usr/bin/perl use strict; use warnings; my $VERSION = (qw$LastChangedRevision: 1811 $)[1] || 0.01; =head1 NAME find_zonecut - Find zonecut for a domain name =head1 SYNOPSIS find_zonecut name =head1 DESCRIPTION B<find_zonecut> returns the name of the closest delegation point to the specified domain name. =cut use Net::DNS; my $resolver = Net::DNS::Resolver->new(); print find_zonecut(shift), "\n"; sub find_zonecut { ## Copyright (c)2014 Dick Franks my $name = shift; my $reply = $resolver->send( "*.$name", 'NULL' ) || die $resolver->errorstring; my ($cut) = map { $_->name } $reply->authority; return $cut || die "failed to find zone cut for $name"; } __END__ =head1 COPYRIGHT (c)2014 Dick Franks E<lt>rwfranks[...]acm.orgE<gt> All rights reserved. FOR DEMONSTRATION PURPOSES ONLY, NO WARRANTY, NO SUPPORT =head1 SEE ALSO L<perl>, L<Net::DNS> =cut