#!/bin/bash
#
# 2023.01.13 Version 1.0
#
#WindowSize=1920x1080
WindowSize=1024x768
#
if [ ! -f /etc/X11/headless.conf ]
then
	BUSID=`nvidia-xconfig --query-gpu-info|grep BusID|awk '{print $4}'`
	nvidia-xconfig -a --allow-empty-initial-configuration --use-display-device=None --virtual=$WindowSize --busid $BUSID -o /etc/X11/headless.conf

cat >> /etc/X11/headless.conf << EOL
#
# The following definitions are mandatory for Headless VNC connections
# do not delete
#
Section "InputClass"
        Identifier "Ignore libinput"
        Driver "libinput"
        Option "Ignore" "True"
EndSection
#
EOL
fi
####################################################
TARGET=$1
#
func_signal()
{
        kill -0 $2 > /dev/null 2>&1
        if [ $? -eq 0 ]
        then
                kill -$1 $2
                return $?
        fi
        return 1
}
#
trap '
	if [ -n $XSERVER ]
	then
		func_signal TERM $XSERVER
		echo -e "\nXorg $XSERVER exited!"
	fi
' 2 3 15
#
export GDM_LANG=$LANG
#XLOG=/tmp/Xorg.$TARGET.log
XLOG=/dev/null 
#VLOG=/tmp/x11vnc.$TARGET.log
VLOG=/dev/null 
#
#
####################################################
#
Xorg -ardelay 300 -arinterval 25 $TARGET -sharevts -auth $XAUTHORITY -config /etc/X11/headless.conf  > $XLOG 2>&1 &
XSERVER=$!
#
echo "Xorg PID $XSERVER"
#
# -noncache スクロールバーが無くなる
# -repeat key auto repeat on
x11vnc -repeat -noxdamage -noscr -clip $WindowSize+0+0 -geometry $WindowSize -forever -shared -noncache -auth $XAUTHORITY -N -display $TARGET > $VLOG 2>&1 &
XVNC=$!
echo "x11vnc PID $XVNC"
#
sleep 3
# Window Manager
# gnome-session:gnome-flachback以外は(xrandrのlogical displayが存在しないため)動作しない
# Open Motif	:動作するが、タイトルの漢字コードは化ける
# kde plasma 	:動作する
# MATE		:動作する
#
#
if [ "$LANG" = "ja_JP.UTF-8" ]
then
	DISPLAY=$TARGET setxkbmap -model pc105 -layout jp,us
fi
#
#
if [ -n $XSERVER ]
then
	wait $XSERVER
        func_signal KILL $XSERVER
fi
if [ -n $XVNC ]
then
        func_signal KILL $XVNC
        echo "x11vnc $XVNC exited!"
fi