freebsd/etc/rc.d/dhclient

#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: dhclient
# KEYWORD: nojail nostart

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

name="dhclient"
rcvar=
start_cmd="dhclient_start"
stop_cmd="dhclient_stop"

dhclient_start()
{
	# prevent unnecessary restarts
	# XXX: dhclient had better create a pidfile
	if [ -x /bin/pgrep ]; then
		pids=`/bin/pgrep -f "dhclient: $ifn(\$| .*)"`
		if [ -n "$pids" ]; then
			sleep 1
			pids=`/bin/pgrep -f "dhclient: $ifn(\$| .*)"`
			if [ -n "$pids" ]; then
				exit 0
			fi
		elif [ -e /var/run/dhclient.pid ]; then
			if [ -n "`pgrep -F /var/run/dhclient.pid`" ]; then
				exit 0
			fi
		fi
	fi

	# Override for $ifn specific flags (see rc.subr for $flags setting)
	specific=`get_if_var $ifn dhclient_flags_IF`
	if [ -z "$flags" -a -n "$specific" ]; then
		rc_flags=$specific
	fi

	background_dhclient=`get_if_var $ifn background_dhclient_IF $background_dhclient`
	if checkyesno background_dhclient; then
		rc_flags="${rc_flags} -b"
	fi

	${dhclient_program} ${rc_flags} $ifn
}

dhclient_stop()
{
	ifconfig $ifn down	# cause dhclient to die
}

ifn="$2"

load_rc_config $name
load_rc_config network

if ! dhcpif $ifn; then
	return 1
fi

run_rc_command "$1"