run-scratch

#!/bin/bash

self=$0
number_of_args=$#
new_display=:$(expr $(echo $DISPLAY | sed -re "s/^:([0-9]+).?[0-9]*/\1/") + 100)
name_of_window=/usr/share/scratch/Scratch.image

root_size=$(xwininfo -root | sed -nre "s/[[:blank:]]*-geometry *([0-9]+)x([0-9]+)[+-][0-9]+[+-][0-9]+/\1,\2/p")
x=$(echo $root_size | cut -d, -f1)
y=$(echo $root_size | cut -d, -f2)
echo size= $x $y
#some problems with multi-monitor systems so kludge it.
x=1366
y=768

function my_xwait() {
    while ! xwininfo -name $1 1>/dev/null 2>/dev/null
    do 
        sleep 0.01
    done
}

if [ $number_of_args == 0 ]
then
    echo display = $new_display
    xinit $self $new_display -- /usr/bin/Xephyr $new_display -fullscreen
else
    export DISPLAY=$1
    echo DISPLAY = $DISPLAY
    (
        my_xwait $name_of_window
        xwit -all -resize $x $y
    )&
    schroot -c ubuntu  -d $HOME --  bash -c "DISPLAY=$DISPLAY scratch" 
fi