Add my backlight shell script

1 files changed, 19 insertions, 0 deletions

diff --git a/util/backlight.sh b/util/backlight.sh
new file mode 100755
index 0000000..15a8423
--- /dev/null
+++ b/util/backlight.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+set -x
+set -e
+# Note the trailing slash
+# base="/sys/class/backlight/amdgpu_bl0/"
+base="/sys/class/backlight/intel_backlight/"
+
+percent="$1"; shift
+_backlight="${base}brightness"
+_max="${base}max_brightness"
+
+# Since `bc` is often not installed by default, just use awk
+_max="$(awk '{print $1/100;}' "$_max")"
+percent="$(echo "${percent}" | awk '{print int($1*'"$_max"');}')"
+
+echo $percent
+
+
+sudo sh -c "echo \"$percent\" > $_backlight"