1#!/bin/rc
 2
 3flag e +
 4
 5file=/sys/class/backlight/amdgpu_bl0/brightness
 6tmpfile=/tmp/.bri
 7
 8switch($1) {
 9	case d
10		 awk <$file '{ print $1 - 5 }' >$tmpfile
11		 cat $tmpfile >$file
12	case i
13		 awk <$file '{ print $1 + 5 }' >$tmpfile
14		 cat $tmpfile >$file
15}