#!/bin/bash
# Random background chooser, ajf101 6/12/2002
# Fixed [to be more generic with resolutions] by rtl101 01-OCT-2003

CSLIB=${CSLIB-/usr/cslib}

BGDIR=${1-$HOME/backgrounds}

i=0
for filename in $BGDIR/*
do
	if [ -r "$filename" ]
	then
		FILES[$i]=$filename
		i=$(($i + 1))
	fi
done

if [ $i -gt 0 ]
then
	rand=$(($RANDOM % $i))
	dim=$(xdpyinfo | grep "dimensions:" | cut -d' ' -f7)
	x=$(echo $dim | cut -d'x' -f1)
	((x2=$x/2))
	y=$(echo $dim | cut -d'x' -f2)
	if [ "$y" -gt "$x2" ]; then 
		$CSLIB/bin/xv -root -quit -geom ${x}x${y} "${FILES[$rand]}" &
	else
		$CSLIB/bin/xv -root -quit -geom ${x2}x${y} "${FILES[$rand]}" &
	fi
fi