freebsd/etc/rc.d/dhclient

#!/bin/sh
#
# $NetBSD: dhclient,v 1.8 2002/03/22 04:33:58 thorpej Exp $
# $FreeBSD$
#

# PROVIDE: dhclient
# REQUIRE: netif ipfw ipfilter mountcritlocal
# BEFORE:  NETWORKING
# KEYWORD: nojail
#
#	Note that there no syslog logging of dhclient messages at boot because
#	dhclient needs to start before services that syslog depends upon do.
#

. /etc/rc.subr
. /etc/network.subr

name="dhclient"
rcvar=
pidfile="/var/run/${name}.pid"
start_precmd="dhclient_prestart"
start_postcmd="dhclient_poststart"
stop_precmd="dhclient_prestop"
stop_postcmd="dhclient_poststop"

dhclient_common()
{
	dhcp_list="`list_net_interfaces dhcp`"
	if [ -z "$dhcp_list" ]; then
		return 1
	fi

	# Determine the scope of the command
	#
	_cooked_list="$dhcp_list"
	if [ -n "$_cmdifn" ]; then
		eval _cooked_list=\"`expr "$dhcp_list" : ".*\($_cmdifn\).*"`\"
		if [ -z "$_cooked_list" ]; then
			err 1 "No such network interface: $_cmdifn"
		fi
	fi
}

dhclient_prestart()
{
	if [ $dhclient_common_error -eq 1 ]; then
		return 1
	fi
	for ifn in ${_cooked_list}; do
		ifscript_up ${ifn}
	done

	if checkyesno background_dhclient; then
		rc_flags="${rc_flags} -nw"
	fi

	rc_flags="${rc_flags} ${_cooked_list}"
	return 0
}

dhclient_poststart()
{
	for ifn in ${_cooked_list}; do
		ifalias_up ${ifn}
		ipx_up ${ifn}
		ifconfig ${ifn}
	done
}

dhclient_prestop()
{
	if [ $dhclient_common_error -eq 1 ]; then
		return 1
	fi
	for ifn in ${_cooked_list}; do
		ipx_down ${ifn}
		ifalias_down ${ifn}
	done
	echo -n "Releasing DHCP leases:"
	for ifn in $_cooked_list ; do
		${command} -r $ifn
		if [ $? -eq 0 ]; then
			echo -n " $ifn"
		else
			_fail="$_fail $ifn"
		fi
	done
	echo '.'
	debug "The following leases failed to release: $_fail"
}

dhclient_poststop()
{
	for ifn in ${_cooked_list}; do
		ifscript_down ${ifn}
	done
}

if [ -n "$2" ]; then
	_cmdifn="$2"
	stop_cmd=":"
fi

load_rc_config $name
dhclient_common_error=0
dhclient_common || dhclient_common_error=1;
if [ -n "$_cooked_list" ]; then
	if [ -s $pidfile ]; then
		stop_cmd=":"
	fi
fi
run_rc_command "$1"