#!/bin/sh
# Copyright 2012 Citrix Systems, Inc. Licensed under the
# Apache License, Version 2.0 (the "License"); you may not use this
# file except in compliance with the License.  Citrix Systems, Inc.
# reserves all rights not expressly granted by the License.
# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# Automatically generated by addcopyright.py at 04/03/2012



 

# usage prepare_ping.sh subnet

dhcpd_conf=
subnet=$1

exit_with_error() {
	echo $1
	exit 1
}

exit_if_fail() {
	[ $? -ne 0 ] && exit_with_error "$*"
}

config_dhcpd() {
	echo "$*" >> $dhcpd_conf
	[ $? -ne 0 ] && exit_with_error "echo $* failed"
}

[ $# -ne 1 ] && exit_with_error "Usage:prepare_ping.sh subnet"

if [ -f "/etc/dhcp/dhcpd.conf" ]; then
	dhcpd_conf="/etc/dhcp/dhcpd.conf"
fi

if [ x"$dhcpd_conf" == "x" ] && [ -f "/etc/dhcpd.conf" ]; then
	dhcpd_conf="/etc/dhcpd.conf"
fi

if [ x"$dhcpd_conf" == "x" ]; then
	exit_with_error "Cannot find dhcpd.conf"
fi

signature=`head -n 1 $dhcpd_conf`
if [ x"$signature" != x"# CloudStack" ]; then
	# prepare dhcpd
	cp $dhcpd_conf /etc/dhcpd.conf.bak -f
	exit_if_fail "Cannot back dhcpd.conf"
	echo "# CloudStack" > $dhcpd_conf
	echo "# This is produced by CloudStack" >> $dhcpd_conf
	config_dhcpd ddns-update-style interim\;
	config_dhcpd subnet $subnet netmask 255.255.255.0 {}
	config_dhcpd allow booting\;
	config_dhcpd allow bootp\;
fi

service dhcpd restart
exit_if_fail "service dhcpd restart failed"
exit 0
