PREUN

/bin/sh

if [ "$1" = "0" ];then
	if [ -f /var/lock/subsys/dhcpd ]; then
		/etc/rc.d/init.d/dhcpd stop >&2
	fi
	/sbin/chkconfig --del dhcpd
fi

POSTIN

/bin/sh

/sbin/chkconfig --add dhcpd
touch /var/lib/dhcp/dhcpd.leases

if [ ! -d /var/lib/dhcp ]; then
	install -d /var/lib/dhcp
fi

if [ -f /var/lock/subsys/dhcpd ]; then
	/etc/rc.d/init.d/dhcpd restart >&2
else
	echo "Run \"/etc/rc.d/init.d/dhcpd start\" to start dhcpd daemon."
fi

Triggers

dhcp < 3.0

/bin/sh

if [ `grep ddns-update-style /etc/dhcpd.conf` = "" ]; then
	echo "ddns-update-style none;" > /etc/dhcpd.conf.tmp
	echo "" >> /etc/dhcpd.conf.tmp
	cat /etc/dhcpd.conf >>/etc/dhcpd.conf.tmp
	mv -f /etc/dhcpd.conf.tmp /etc/dhcpd.conf
fi