#!/bin/bash
+# Copyright (C) 2016 Ian Kelling
# chost: get canonical hostname
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
host=$1
-addr=$(host $host)
-addr=${addr##* }
+addr=$(host $host | sed -rn 's/^.*has address (.*)/\1/p;T;q')
h=$(host $addr)
h=${h##* }
echo ${h%%.*}