From 68562d5d8534da9acea79f040c0a57355f374267 Mon Sep 17 00:00:00 2001
From: Olli Pikarinen <olli.pikarinen@wunderdog.fi>
Date: Fri, 19 Jan 2018 13:00:04 +0200
Subject: [PATCH] Add util to grok with display backlight brightness

---
 scripts/brightness | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100755 scripts/brightness

diff --git a/scripts/brightness b/scripts/brightness
new file mode 100755
index 0000000..90f4ee5
--- /dev/null
+++ b/scripts/brightness
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+: ${1?"Usage: $0 argument"}
+
+brightness=`cat /sys/class/backlight/intel_backlight/brightness`
+max_brightness=`cat /sys/class/backlight/intel_backlight/max_brightness`
+new_brightness=`printf %.0f $(echo "$brightness*$1" | bc -l)`
+
+if [ $new_brightness -gt $max_brightness ] 
+then
+    new_brightness=$max_brightness
+fi
+
+echo $new_brightness > /sys/class/backlight/intel_backlight/brightness