1 files changed, 20 insertions, 0 deletions
diff --git a/.local/bin/backlight b/.local/bin/backlight
new file mode 100755
index 0000000..cf48dca
--- /dev/null
+++ b/.local/bin/backlight
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+[[ -n "$BACKLIGHT" ]] || BACKLIGHT=intel_backlight
+fmax=/sys/class/backlight/$BACKLIGHT/max_brightness
+fcur=/sys/class/backlight/$BACKLIGHT/brightness
+read max < $fmax || exit $?
+case $# in
+	0)
+		read cur < $fcur
+		bc <<<"100*$cur/$max" | cut -d. -f1
+		;;
+	1)
+		declare -i pct="$1"
+		bc <<<"$max*$pct/100" | cut -d. -f1 > $fcur
+		;;
+	*)
+		echo "Usage: [BACKLIGHT=<device_id>] backlight [<percent>]" >&2
+		exit 1
+		;;
+esac