From 65ef320c6a7af0fe1ea4576b2b4e8ee21e5af8a3 Mon Sep 17 00:00:00 2001
From: Graham Barr <gbarr@pobox.com>
Date: Fri, 26 Oct 2001 15:33:47 +0000
Subject: More fixes from the core for undefs

---
 Net/Domain.pm | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/Net/Domain.pm b/Net/Domain.pm
index a1c6490..62b9d96 100644
--- a/Net/Domain.pm
+++ b/Net/Domain.pm
@@ -16,7 +16,7 @@ use Net::Config;
 @ISA = qw(Exporter);
 @EXPORT_OK = qw(hostname hostdomain hostfqdn domainname);
 
-$VERSION = "2.16"; # $Id: //depot/libnet/Net/Domain.pm#17 $
+$VERSION = "2.16"; # $Id: //depot/libnet/Net/Domain.pm#18 $
 
 my($host,$domain,$fqdn) = (undef,undef,undef);
 
@@ -36,8 +36,8 @@ sub _hostname {
           my $a = shift(@addr);
           $host = gethostbyaddr($a,Socket::AF_INET());
           last if defined $host;
-         } 
-        if (index($host,'.') > 0) {
+         }
+        if (defined($host) && index($host,'.') > 0) {
            $fqdn = $host;
            ($host,$domain) = $fqdn =~ /^([^\.]+)\.(.*)$/;
          }
@@ -102,7 +102,7 @@ sub _hostname {
 	};
     }
 
-    # remove garbage 
+    # remove garbage
     $host =~ s/[\0\r\n]+//go;
     $host =~ s/(\A\.+|\.+\Z)//go;
     $host =~ s/\.\.+/\./go;
@@ -147,7 +147,7 @@ sub _hostdomain {
 
     @hosts = ($host,"localhost");
 
-    unless($host =~ /\./) {
+    unless (defined($host) && $host =~ /\./) {
 	my $dom = undef;
         eval {
     	    my $tmp = "\0" x 256; ## preload scalar
@@ -179,19 +179,19 @@ sub _hostdomain {
 
     # Attempt to locate FQDN
 
-    foreach (@hosts) {
+    foreach (grep {defined $_} @hosts) {
     	my @info = gethostbyname($_);
 
     	next unless @info;
 
     	# look at real name & aliases
     	my $site;
-    	foreach $site ($info[0], split(/ /,$info[1])) { 
+    	foreach $site ($info[0], split(/ /,$info[1])) {
     	    if(rindex($site,".") > 0) {
 
     	    	# Extract domain from FQDN
 
-     	    	($domain = $site) =~ s/\A[^\.]+\.//; 
+     	    	($domain = $site) =~ s/\A[^\.]+\.//;
      	        return $domain;
     	    }
     	}
@@ -231,7 +231,7 @@ sub domainname {
     return $fqdn = $host if defined $host and $host =~ /^\d+(\.\d+){3}$/;
 
     my @host   = defined $host   ? split(/\./, $host)   : ('localhost');
-    my @domain = defined $domain ? split(/\./, $domain) : ('');
+    my @domain = defined $domain ? split(/\./, $domain) : ();
     my @fqdn   = ();
 
     # Determine from @host & @domain the FQDN
@@ -331,6 +331,6 @@ it under the same terms as Perl itself.
 
 =for html <hr>
 
-I<$Id: //depot/libnet/Net/Domain.pm#17 $>
+I<$Id: //depot/libnet/Net/Domain.pm#18 $>
 
 =cut
-- 
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