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#!/afs/athena/contrib/perl/p
if ($#ARGV == -1) {
chop($hostname = `hostname`);
} else {
$hostname = $ARGV[0];
}
if (! (($type,$addr) = (gethostbyname($hostname))[2,4])) {
print STDERR "No such host: $hostname\n";
exit(1);
}
if (! ($qualname = (gethostbyaddr($addr,$type))[0])) {
print STDERR "No address information for host $hostname\n";
exit(1);
}
print "$qualname\n";
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