#! /bin/sh

BIN=/usr/sbin/radeontool
STATUS=/var/run/ibm-t43-backlight

test -x "$BIN" || exit 0

if test "$1"; then
	if test "$1" = "1"; then
		test -e "$STATUS" && rm "$STATUS"
		$BIN light on
	elif test "$1" = "0"; then
		$BIN light off
		touch "$STATUS"
	fi
else
	if test ! -e "$STATUS"; then
		$BIN light off
		touch "$STATUS"
	else
		$BIN light on
		rm "$STATUS"
	fi
fi