How to autostart application with busysbox (System V)

1.Create file /etc/init.d/demo with following content :

#!/bin/sh
# launch demo application
#
export QWS_MOUSE_PROTO=tslib:/dev/input/event1
export TSLIB_TSDEVICE=/dev/input/event1
DEMO_PATH=/usr/bin/qwt-6.0.1
DEMO_EXEC=oscilloscope
DEMO_OPTS=-qws -display "transformed:rot180:1"

case "$1" in
        start)
                echo 0 > /sys/class/graphics/fbcon/cursor_blink
                echo 0 > /sys/class/graphics/fb0/blank
                echo 1 >  /sys/class/backlight/backlight@1/brightness
                /bin/mount -o remount,rw /
                /usr/bin/ts_calibrate
                /bin/mount -o remount,ro /
                ${DEMO_PATH}/${DEMO_EXEC} ${DEMO_OPTS} &
                ;;
        stop)
                killall ${DEMO_EXEC}
                ;;
        *)
                echo "Usage: $0 {start|stop}"
                exit 1
                ;;
esac
exit 0

2. make /etc/init.de/demo executable.

chmod a+x /etc/init.d/demo

3. create symlink S99demo in /etc/rc.d/ that points to the file /etc/init.d/demo:

cd /etc/rc.d
ln -s ../init.d/demo S99demo