dummyX

#!/bin/bash
# (c) 2020 Leif Sawyer
# License: GPL 3.0 (see https://github.com/akhepcat/)
# Permanent home:  https://github.com/akhepcat/Miscellaneous/
# Direct download: https://raw.githubusercontent.com/akhepcat/Miscellaneous/master/dummyX
# 
PROG="${0##*/}"

CWD=$(pwd -P)

XDIR=/tmp
XCONF=xdummy.conf
XLOG=xdummy.log

DISP=$(ps -ef|grep Xorg | grep -vE 'grep|vt[0-9]' | sed 's/.*:\([0-9]*\).*/\1/' | tail -1)
DISPLAY=${DISP:-1000}
RFBPORT=$((DISPLAY + 4901))
XDISP=":$((DISPLAY + 1))"

prereqs() {
        for i in  x11vnc xfwm4 xfce4-panel xterm xhost;
        do
                if [ -z "$(which $i)" ]
                then
                        showreqs=1
			reqs="${reqs} ${i}"
                fi
        done

        dpkg -l xserver-xorg-video-dummy >/dev/null 2>&1
        if [ $? -ne 0 ]
        then
        	showreqs=1
        	reqs="${reqs} xserver-xorg-video-dummy"
        fi

        if [ 1 -eq ${showreqs:-0} ]
        then
                echo "Prerequisites are missing!"
                echo "Please make sure the following packages are installed:"
                echo ""
                echo "xserver-xorg-video-dummy x11vnc xfwm4 xfwm4-themes xfce4-panel xfce4-indicator-plugin xterm x11-xserver-utils"
		echo ""
		echo "can't find: ${reqs}"
                echo ""
                exit 1
        fi

}

create_xconf() {
cd ${XDIR}
cat >${XCONF} <<EOF

Section "ServerFlags"
  Option "DontVTSwitch" "true"
  Option "AllowMouseOpenFail" "true"
  Option "PciForceNone" "true"
  Option "AutoEnableDevices" "false"
  Option "AutoAddDevices" "false"
EndSection

Section "InputDevice"
  Identifier "dummy_mouse"
  Option "CorePointer" "true"
  Driver "void"
EndSection

Section "InputDevice"
  Identifier "dummy_keyboard"
  Option "CoreKeyboard" "true"
  Driver "void"
EndSection

Section "Device"
    Identifier		"VDummy"
    Driver		"dummy"
    #VideoRam		256000
    VideoRam		16384
    Option		"ConstantDPI" "true"
    Option		"IgnoreEDID" "true"
    Option		"NoDDC" "true"
EndSection

Section "Monitor"
    Identifier		"dummy_monitor"
    HorizSync		15.0-100.0
    VertRefresh		15.0-200.0
    Modeline		"1920x1080" 23.53 1920 1952 2040 2072 1080 1106 1108 1135
    Modeline		"1280x1024" 31.50 1280 1312 1424 1456 1024 1048 1052 1076
    Modeline		"1024x768" 18.71 1024 1056 1120 1152 768 786 789 807
EndSection

Section "Screen"
    Identifier		"dummy_screen"
    Monitor		"dummy_monitor"
    Device		"VDummy"
    DefaultDepth	24

    SubSection		"Display"
        Viewport	0 0
        Depth		24
        Modes		"1920x1080" "1280x1024" "1024x768"
        Virtual		1920 1080
    EndSubSection
EndSection

Section "ServerLayout"
  Identifier   "dummy_layout"
  Screen       "dummy_screen"
  InputDevice  "dummy_mouse"
  InputDevice  "dummy_keyboard"
EndSection


EOF
cd ${CWD}
}

fix_perms() {
	sed -i 's/^\(allowed_users\)=.*/\1=anybody/g' /etc/X11/Xwrapper.config 
}

do_xfwm4() {
	# different versions need different calling
        xfwm4 --display=${XDISP} 2>/dev/null & 
        if [ $? -ne 0 ]
        then
        	DISPLAY=${XDISP} xfwm4 2>/dev/null &
        fi
}

do_xfce4() {
	# different versions need different calling
        xfce4-panel --display=${XDISP} 2>/dev/null &
        if [ $? -ne 0 ]
        then
		DISPLAY=${XDISP} xfce4-panel 2>/dev/null &

        fi
}

start_xdummy() {
        USER=$(/usr/bin/whoami)
        HOST=$(/bin/hostname | cut -f 1 -d.)
        FBDIR=$(mktemp -d /tmp/vmfbXXXXX)
	cd ${XDIR}

	/usr/lib/xorg/Xorg -dpi 96 -noreset -nolisten tcp +extension GLX +extension RANDR +extension RENDER -logfile ${XLOG} -configdir ${XDIR} -config ${XCONF} ${XDISP} 2>/dev/null &
	sleep 1
	cd ${CWD}

#	This is broken, so we manually do things - but then we can't "logout" which... is fine?
#	( export DISPLAY=${XDISP};  startxfce4 DISPLAY=${XDISP} ) &
#	sleep 1
        xterm -ls  -sl 1000 -sb -T ${USER}@${HOST} -fg white -bg black -C -fn 9x15 -display ${XDISP} 2>/dev/null &
        sleep 1
        do_xfwm4
        sleep 1
        do_xfce4
        sleep 1
        DISPLAY=${XDISP} xhost +localhost

        x11vnc -q -rfbport ${RFBPORT} -forever -alwaysshared -bg -nopw -display ${XDISP}
	

}

start() {
	create_xconf
	start_xdummy
}

stop() {
	rm -f ${XCONF}
        PIDS=$(pgrep -la Xorg | grep xdummy | awk '{print $1}')
        for PID in $PIDS
        do
                kill ${PID}
        done
}

status() {
        pgrep -la Xorg | grep xdummy
        [[ $? -eq 1 ]] && echo "${PROG} is not running (no xorg-dummy processes found)"
}

case ${1} in
	start) prereqs; start
		;;
	stop) stop
		;;
	prep) create_xconf
		;;
	status) prereqs; status
		;;
	*) echo "$0 [start|stop|status]"
		;;
esac