JDownloader 2 as a Linux SysVInit daemon in a virtual display with VNC Server

jd2_initd.sh

#! /bin/sh -ex
### BEGIN INIT INFO
# Provides:          JDownloader 2
# Required-Start:    $x11-common    
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start and stop JDownloader 2
# Description:       With this script you are able to run JDownloader 2 as deamon.
### END INIT INFO

# Author: Moritz Schappler <moritz-schappler@web.de>
# Sources:
# [1] Jonas Lehmke <jonas@3jo.de> https://forum.ubuntuusers.de/topic/howto-jdownloader-2-beta-auf-ubuntu-server/#post-6706552
# [2] https://gist.github.com/dmitriy-kiriyenko/974392


NAME="jd2window"
USER=jd
RUNDIR=/var/run/$NAME

PIDFILE1=$RUNDIR/xvfb.pid
PIDFILE2=$RUNDIR/openbox.pid
PIDFILE3=$RUNDIR/jd2.pid

DAEMON1=/usr/bin/Xvfb
DAEMON1_OPTS=":1 -screen 0 1024x768x24"
DAEMON2=/usr/bin/openbox-session
DAEMON2_OPTS=""
DAEMON3=/usr/local/jd2/JDownloader2
DAEMON3_OPTS=""

mkdir -p $RUNDIR
chown -R $USER $RUNDIR

# Aktionen
case "$1" in
  start)
    echo "Starting JD2 in Openbox WindowManager in Xvfb Display"
    if test -e $PIDFILE1 ; then
      echo "$DAEMON1 already running (PID-File $PIDFILE1 exists). Try restart instead"
      exit 1
    else
      start-stop-daemon --start --chuid $USER --background --make-pidfile --pidfile "$PIDFILE1" --exec "$DAEMON1" -- $DAEMON1_OPTS &
      echo "started $DAEMON1"
      sleep 2
    fi
    
    export DISPLAY=:1
    if test -e $PIDFILE2 ; then
      echo "$DAEMON2 already running (PID-File $PIDFILE2 exists). Try restart instead"
      exit 1
    else
      start-stop-daemon --start --chuid $USER --background --make-pidfile --pidfile "$PIDFILE2" --exec "$DAEMON2" -- $DAEMON2_OPTS
      echo "started $DAEMON2"
      sleep 2
    fi
    
    if test -e $PIDFILE3 ; then
      echo "$DAEMON3 already running (PID-File $PIDFILE3 exists). Try restart instead"
      exit 1
    else
      start-stop-daemon --start --chuid $USER --background --make-pidfile --pidfile "$PIDFILE3" --exec "$DAEMON3" -- $DAEMON3_OPTS
    fi
    ;;

  stop)
    echo "Stopping JD2 in Openbox WindowManager in Xvfb Display"
    start-stop-daemon --stop --chuid $USER --pidfile "$PIDFILE3"
    test -e $PIDFILE3 && rm $PIDFILE3
    echo "stopped $DAEMON3"

    start-stop-daemon --stop --chuid $USER --pidfile "$PIDFILE2" 
    test -e $PIDFILE2 && rm $PIDFILE2
    echo "stopped $DAEMON2"

    start-stop-daemon --stop --chuid $USER --pidfile "$PIDFILE1"
    test -e $PIDFILE1 && rm $PIDFILE1
    echo "stopped $DAEMON1"
  ;;
  restart)
    $0 stop
    $0 start
  ;;
esac

exit 0

x11vnc_jd.service

[Unit]
Description=Start x11vnc at startup (display 1).
After=multi-user.target

[Service]
Type=forking
ExecStart=/usr/bin/x11vnc -auth /var/run/lightdm/root/:0  -display :1  -rfbauth /etc/x11vnc.pass  -rfbport 5901 -rfbportv6 5901  -noxrecord -noxfixes -noxdamage -forever -bg  -o /var/log/x11vnc_jdwindow.log
Restart=on-failure
RestartSec=10

[Install]
WantedBy=multi-user.target