#!/bin/sh

[ $# -ge 1 ] || {
	echo "usage: xbmtoico file" >&2
	exit 1
}

trap 'rm -f $tmp' EXIT INT TERM HUP 
tmp=`mktemp /tmp/xbmtoico.XXXXXXXXX`
xbmtopbm "$1" >$tmp
pambackground $tmp | pnminvert | ppmtowinicon -andpgms $tmp -