#!/bin/sh

. /etc/init.d/modlibrc
DAEMON=dsld
DAEMON_LONG_NAME="AVM dsld"
PID_FILE=/var/run/${DAEMON}.pid

TMPFILE_CMD=/tmp/.dsld.cmd
TMPFILE_OPT=/tmp/.dsld.opt

# include environment required for dsld restart
[ -r /var/env.cache ] && . /var/env.cache

start() {
	echo -n "Starting ${DAEMON_LONG_NAME} ... "

	if [ -e $TMPFILE_CMD ]; then
		DAEMON_CMD="$(cat $TMPFILE_CMD)"
	else
		if [ ! -e "/sbin/igdd" ] && [ ! -e "/sbin/upnpd" ]; then
			DAEMON_CMD=" $(dsld -? 2>&1 | grep "igd" | sed 's/^[ \t]*//' | cut -c 1-3)"
		fi
		DAEMON_CMD=" -i$DAEMON_CMD"
		echo "$DAEMON_CMD" > $TMPFILE_CMD
	fi

	if [ -e $TMPFILE_OPT ]; then
		DAEMON_OPT="$(cat $TMPFILE_OPT)"
	else
		DAEMON_OPT=" -n"
		echo "$DAEMON_OPT" > $TMPFILE_OPT
	fi

	# dsld could not start without eth0
	local countdown=20
	while [ $((countdown--)) -gt 0 ] && ! ifconfig eth0 > /dev/null 2>&1; do
		sleep 1
	done

	#remove duplicate arguments
	DAEMON_ARGS="$(for arg in $DAEMON_CMD $DAEMON_OPT; do [ "$arg" != "dsld" ] && echo " $arg"; done |sort -u)"
	dsld $DAEMON_ARGS
	exitval=$?
	if [ "$exitval" -eq 0 ]; then
		echo 'done.'
	else
		echo 'failed.'
		exit $exitval
	fi
}

stop() {
	[ -e $TMPFILE_OPT ] || echo " -n" > $TMPFILE_OPT
	#save current arguments
	local DAEMON_PID=$(cat $PID_FILE 2>/dev/null)
	if [ -n "$DAEMON_PID" ]; then
		for arg in $(xargs -0 < /proc/${DAEMON_PID}/cmdline); do grep -q " $arg" $TMPFILE_OPT 2>/dev/null || echo " $arg"; done > $TMPFILE_CMD
	fi
	dsld -s
}

reload() {
	dsld -I
}

set_options() {
	DAEMON_OPT_NEW=" $*"
	if [ " $(cat $TMPFILE_OPT 2>/dev/null)" != "$DAEMON_OPT_NEW" ]; then
		DAEMON_STATUS="$(modlib_status)"
		[ "$DAEMON_STATUS" != "stopped" ] && modlib_stop
		echo "$DAEMON_OPT_NEW" > $TMPFILE_OPT
		[ "$DAEMON_STATUS" != "stopped" ] && modlib_start
	fi
}

case $1 in
	""|load)
		modreg daemon -p avm dsld
		;;
	unload)
		modunreg daemon avm dsld
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	reload)
		modlib_reload
		;;
	status)
		modlib_status
		;;
	set_options)
		$*
		;;
	*)
		echo "Usage: $0 [start|stop|restart|reload|status|set_options [dsld-options]]" 1>&2
		exit 1
		;;
esac

exit 0