#!/bin/sh

### BEGIN INIT INFO
# Provides:          etherpad-lite
# Required-Start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts etherpad lite
# Description:       starts etherpad lite using start-stop-daemon
### END INIT INFO

LOGFILE="/opt/etherpad-lite/var/etherpad.log"
EPLITE_DIR="/opt/etherpad-lite"
EPLITE_BIN="bin/safeRun.sh"
USER="etherpad-systemuser"
GROUP="etherpad-systemuser"
DESC="Etherpad Lite"
NAME="etherpad-lite"

. /lib/lsb/init-functions

start() {
  echo "Starting $DESC... "
  # check ucr autostart setting
  if [ -f "/usr/share/univention-config-registry/init-autostart.lib" ]; then
    . "/usr/share/univention-config-registry/init-autostart.lib"
    check_autostart "$DESC" etherpad-lite/autostart
  fi

  start-stop-daemon --start --chuid "$USER:$GROUP" --background --make-pidfile --pidfile /var/run/$NAME.pid --exec $EPLITE_DIR/$EPLITE_BIN -- $LOGFILE || true
  echo "done"
}

#We need this function to ensure the whole process tree will be killed
killtree() {
    local _pid=$1
    local _sig=${2-TERM}
    for _child in $(ps -o pid --no-headers --ppid ${_pid}); do
        killtree ${_child} ${_sig}
    done
    kill -${_sig} ${_pid}
}

stop() {
  echo "Stopping $DESC... "
  _status >/dev/null 2>&1
  if [ "$?" -eq 0 ]; then
    while test -d /proc/$(cat /var/run/$NAME.pid); do
      killtree $(cat /var/run/$NAME.pid) 15
      sleep 1
    done
    rm /var/run/$NAME.pid
  fi
  echo "done"
}

_status() {
  status_of_proc -p /var/run/$NAME.pid "" "etherpad-lite"
}

status() {
  _status
  exit $?
}

case "$1" in
  start)
      start
      ;;
  stop)
      stop
      ;;
  restart)
      stop
      start
      ;;
  status)
      status
      ;;
  *)
      echo "Usage: $NAME {start|stop|restart|status}" >&2
      exit 1
      ;;
esac

exit 0
