#!/bin/sh

### BEGIN INIT INFO
# Provides:        timeserver
# Required-Start:  $network $remote_fs $syslog
# Required-Stop:   $network $remote_fs $syslog
# Default-Start:   2 3 4 5
# Default-Stop:    1
# Short-Description: Start time service
### END INIT INFO

PATH=/sbin:/bin:/usr/sbin:/usr/bin/:/usr/local/bin

. /lib/lsb/init-functions

DAEMON1=/usr/local/sbin/gpsd
PIDFILE1=/var/run/gpsd.pid
DAEMON2=/usr/local/sbin/ntpd
PIDFILE2=/var/run/ntpd.pid

test -x $DAEMON1 || exit 5
test -x $DAEMON2 || exit 5

LOCKFILE=/var/lock/ntpdate

lock_ntpdate() {
	if [ -x /usr/bin/lockfile-create ]; then
		lockfile-create $LOCKFILE
		lockfile-touch $LOCKFILE &
		LOCKTOUCHPID="$!"
	fi
}

unlock_ntpdate() {
	if [ -x /usr/bin/lockfile-create ] ; then
		kill $LOCKTOUCHPID
		lockfile-remove $LOCKFILE
	fi
}

NTPD_OPTS=-g

RUNASUSER=ntp
UGID=$(getent passwd $RUNASUSER | cut -f 3,4 -d:) || true
if test "$(uname -s)" = "Linux"; then
	NTPD_OPTS="$NTPD_OPTS -u $UGID"
fi

# It's best to have gpsd start first.  That way when ntpd restarts it has
# a good local time handy.  If ntpd starts first, it will set the local
# clock using a remote, probably pool, server.  Then ntpd has to spend a
# whole day undoing the damage done to the PLL.

case $1 in
	start)
		# Make sure the UART device is in a good state
	        # Adafruit HAT starts at some weird baud rate unknown to man.
		stty -F /dev/gpsd0 raw 9600 cs8 clocal -cstopb
		# Launch gpsd
		log_daemon_msg "Starting GPSD server" "timeservice"
		start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE1 --startas $DAEMON1 -- -P $PIDFILE1 $GPSD_OPTS /dev/gpsd0
		status=$?
		log_end_msg $status
		lock_ntpdate
		# Launch ntpd
		log_daemon_msg "Starting NTP server" "timeservice"
		start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE2 --startas $DAEMON2 -- -p $PIDFILE2 $NTPD_OPTS
		status=$?
		log_end_msg $status
		unlock_ntpdate
		;;
	stop)
		log_daemon_msg "Stopping gpsd" "timeservice"
		start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE1
		log_end_msg $?
		log_daemon_msg "Stopping ntpd" "timeservice"
		start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE2
		log_end_msg $?
		rm -f $PIDFILE1 $PIDFILE2
		;;
	restart|force-reload)
		$0 stop && sleep 2 && $0 start
		;;
	try-restart)
		if $0 status >/dev/null; then
			$0 restart
		else
			exit 0
		fi
		;;
	reload)
		exit 3
		;;
	status)
		status_of_proc $DAEMON1 "time service"
		status_of_proc $DAEMON2 "time service"
		;;
	*)
		echo "Usage: $0 {start|stop|restart|try-restart|force-reload|status}"
		exit 2
		;;
esac

# end