iankelling.org Git - automated-distro-installer/blob - chost

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # chost: get canonical hostname
   5
   6 set -eE -o pipefail
   7 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
   8
   9 host=$1
  10 addr=$(getent hosts $host | awk '{print $1}')
  11 h=$(getent hosts $addr | awk '{print $2}')
  12 echo ${h%%.*}