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#!/usr/bin/perl
$VERSION = (qw$LastChangedRevision: 1251 $)[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 strict;
use Net::DNS;
my $resolver = new Net::DNS::Resolver();
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.
This program is free software; you may use or redistribute
it under the same terms as Perl itself.
FOR DEMONSTRATION PURPOSES ONLY, NO WARRANTY, NO SUPPORT
=head1 SEE ALSO
L<perl>, L<Net::DNS>
=cut
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