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- #!/usr/local/bin/perl
- #
- # hosts-domain - counts the number of hosts per domain
- # The host names should be absolute (see expand) and in the
- # first column of input (see hosts)
- #
- # Copyright (C) 1992, 1993 PUUG - Grupo Portugues de Utilizadores
- # do Sistema UNIX
- # 1992, 1993 FCCN - Fundacao para o Desenvolvimento dos Meios
- # Nacionais de Calculo Cientifico
- #
- # Authors: Jorge Frazao de Oliveira <frazao@puug.pt>
- # Artur Romao <artur@dns.pt>
- #
- # This file is part of the DDT package, Version 2.0.
- #
- # Permission to use, copy, modify, and distribute this software and its
- # documentation for any purpose and without any fee is hereby granted,
- # provided that the above copyright notice appear in all copies. Neither
- # PUUG nor FCCN make any representations about the suitability of this
- # software for any purpose. It is provided "as is" without express or
- # implied warranty.
-
-
- $[ = 1; # set array base to 1
-
- while (<STDIN>) {
- ($Name) = split(/\s+/, $_);
-
- @label = split(/\./, $Name);
- $n = $#label;
-
- $domain = $label[$n]; # topmost domain
-
- foreach $i ($[ .. $n - 1) {
- $hosts{$domain}++;
-
- # build the domain name backwards
- $domain = join(".", $label[$n - $i], $domain);
- }
- }
-
- foreach $dom (keys %hosts) {
- printf "%5d %s\n", $hosts{$dom}, $dom;
- }
-
-