#!/bin/zsh -e
# PUMP Script
# $1 Calling circumstance (up, renewal, down)
# $2 interface
# $3 ip

# Exit early, if we're not being called for the initial lease
[ "$1" != "up" ] && exit 0

. /etc/grml/autoconfig.functions


# only run if no nodhcphostname parameter is given
if ! checkbootparam 'nodhcphostname' ; then

    hostname=$(host $3) || exit 1
    # dhcphostname is set, get the PTR for the ip
    hostname=$(echo ${hostname} | awk '{ print substr($5, 0, length($5)-1) }')

    if [ -n "$hostname" ] ; then
        echo $hostname > /etc/hostname
        hostname -F /etc/hostname
    fi
fi