1 files changed, 44 insertions, 0 deletions
diff --git a/dim-screen.sh b/dim-screen.sh
new file mode 100755
index 0000000..9958917
--- /dev/null
+++ b/dim-screen.sh
@@ -0,0 +1,44 @@
+#!/bin/bash -x
+
+# Example notifier script -- lowers screen brightness, then waits to be killed
+# and restores previous brightness on exit.
+
+## CONFIGURATION ##############################################################
+
+# Brightness will be lowered to this value.
+min_brightness=500
+
+# If your video driver works with xbacklight, set -time and -steps for fading
+# to $min_brightness here. Setting steps to 1 disables fading.
+fade_steps=20
+
+# Time to sleep (in seconds) between increments when using sysfs. If unset or
+# empty, fading is disabled.
+fade_step_time=0.05
+
+###############################################################################
+
+get_brightness() {
+    brightnessctl get
+}
+
+set_brightness() {
+    brightnessctl set $1
+}
+
+fade_brightness() {
+    local level
+    local value=$(get_brightness)
+    local decrement=$((($value - $1) / $fade_steps))
+    for level in $(eval echo {$fade_steps..1}); do
+        local value=$(($value - $decrement))
+        set_brightness $value
+        sleep $fade_step_time
+    done
+}
+
+trap 'exit 0' TERM INT
+trap "set_brightness $(get_brightness); kill %%" EXIT
+fade_brightness $min_brightness
+sleep 2147483647 &
+wait