cloudstack/scripts/network/exdhcp/prepare_dhcpd.sh
2012-01-11 18:41:53 -08:00

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#!/bin/sh
# Copyright (C) 2011 Citrix Systems, Inc. All rights reserved
#
# This software is licensed under the GNU General Public License v3 or later.
#
# It is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# 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