#!/bin/sh
DAEMON=/usr/bin/dnsmasq
NAME=dnsmasq
DESC="DNS forwarder and DHCP server"
ARGS="-7 /etc/dnsmasq.d"

test -f $DAEMON || exit 0

set -e

if [ -r /etc/default/$NAME ]
then
	. /etc/default/$NAME
fi

DNSMASQ_CONF="/etc/dnsmasq.conf"
test "/etc/dnsmasq.d/*" != '/etc/dnsmasq.d/*' && DNSMASQ_CONF="${DNSMASQ_CONF} /etc/dnsmasq.d/*"

test -z "${PIDFILE}" && PIDFILE="/run/dnsmasq.pid"

if [ -z "$IGNORE_RESOLVCONF" ]
then
	egrep -h -q '^no-resolv' ${DNSMASQ_CONF} && IGNORE_RESOLVCONF="yes"
fi

# RESOLV_CONF:
# If the resolvconf package is installed then use the resolv conf file
# that it provides as the default.  Otherwise use /etc/resolv.conf as
# the default.
#
# If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
# filename is set there then this inhibits the use of the resolvconf-provided
# information.
#
# Note that if the resolvconf package is installed it is not possible to
# override it just by configuration in /etc/dnsmasq.conf, it is necessary
# to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.

test -z "$RESOLV_CONF" -a "$IGNORE_RESOLVCONF" != "yes" -a -x /sbin/resolvconf && \
	RESOLV_CONF=/run/dnsmasq/resolv.conf

start_resolvconf()
{
        if [ "$IGNORE_RESOLVCONF" != "yes" -a -x /sbin/resolvconf ]
	then
		echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
	fi
	:
}

stop_resolvconf()
{
	if [ "$IGNORE_RESOLVCONF" != "yes" -a -x /sbin/resolvconf ]
	then
		/sbin/resolvconf -d lo.$NAME
	fi
	:
}

case "$1" in
    start)
        echo -n "starting $DESC: $NAME... "
	test -d /var/lib/misc/ || mkdir /var/lib/misc/
	start-stop-daemon -S -x $DAEMON -- $ARGS \
		${RESOLV_CONF:+ -r $RESOLV_CONF} \
		${PIDFILE:+ -x $PIDFILE}
	test $? -eq 0 && start_resolvconf
	echo "done."
	;;
    stop)
        echo -n "stopping $DESC: $NAME... "
	stop_resolvconf
	start-stop-daemon -K -x $DAEMON
	echo "done."
	;;
    status)
	echo -n "dnsmasq "
	start-stop-daemon -q -K -t -x $DAEMON
	RET=$?
	if [ "$RET" = "0" ]; then
		PID=`cat ${PIDFILE}`
		echo "($PID) is running"
	else
		echo "is not running"
		exit $RET
	fi
	;;
    restart)
        echo "restarting $DESC: $NAME... "
 	$0 stop
	$0 start
	echo "done."
	;;
    reload)
    	echo -n "reloading $DESC: $NAME... "
    	killall -HUP $(basename ${DAEMON})
	echo "done."
	;;
    systemd-start-resolvconf)
	start_resolvconf
	;;
    systemd-stop-resolvconf)
	stop_resolvconf
	;;
    systemd-exec)
	test -d /var/lib/misc/ || mkdir /var/lib/misc/
	exec $DAEMON --keep-in-foreground $ARGS \
		${RESOLV_CONF:+ -r $RESOLV_CONF} \
		${PIDFILE:+ -x $PIDFILE}
	;;
    *)
	echo "Usage: $0 {start|stop|status|restart|reload}"
	exit 1
	;;
esac

exit 0
