#! /bin/sh
### BEGIN INIT INFO
# Provides:          diya
# Short-Description: simple session manager
# Description:       session manager that allows user login and
#                    start user session
### END INIT INFO
#
# -*- coding: utf-8 -*-

# set -e

# shellcheck disable=SC1091
. /etc/init.d/functions

DAEMON=/usr/bin/diya-session-manager
NAME=diya-sessiond
PIDFILE=/var/run/diya/sessiond.pid
DESC="Diya session manager"
DAEMONUSER="root"
PARAMS="-c /etc/diya/daemon.conf"
test -x $DAEMON || exit 0

start_it_up()
{
  mkdir -p "$(dirname $PIDFILE)"
  if [ -e $PIDFILE ]; then
    PIDDIR=/proc/$(cat $PIDFILE)
    if [ -d ${PIDDIR} -a  "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then 
      echo "$DESC already started; not starting."
    else
      echo "Removing stale PID file $PIDFILE."
      rm -f $PIDFILE
    fi
  fi

  echo -n "Starting $DESC: "
  start-stop-daemon -o --start --quiet --pidfile $PIDFILE \
    --user $DAEMONUSER --exec $DAEMON -- $PARAMS
  echo "$NAME."
}

shut_it_down()
{
  echo -n "Stopping $DESC: "
  start-stop-daemon -o --stop  --quiet --pidfile $PIDFILE \
    --user $DAEMONUSER
  # We no longer include these arguments so that start-stop-daemon
  # can do its job even given that we may have been upgraded.
  # We rely on the pidfile being sanely managed
  # --exec $DAEMON -- --system $PARAMS
  echo "$NAME."
  rm -f $PIDFILE
}

case "$1" in
  start)
    start_it_up
  ;;
  stop)
    shut_it_down
  ;;
  status)
    status $DAEMON
    exit $?
  ;;
  restart)
    shut_it_down
    sleep 1
    start_it_up
  ;;
  *)
    echo "Usage: /etc/init.d/$NAME {start|stop|status|restart}" >&2
    exit 1
  ;;
esac

exit 0