xss-lock fading screen improved

dim-screen.sh

#!/bin/bash

# adapted from xss-lock documantation
# https://bitbucket.org/raymonad/xss-lock/src/1e158fb20108058dbd62bd51d8e8c003c0a48717/doc/dim-screen.sh

# Brightness will be lowered to this value.
min_brightness=0

# Set -time and -steps for fading
# to $min_brightness here. Setting steps to 1 disables fading.
fade_time=5000
fade_steps=400

###############################################################################

get_brightness() {
    xbacklight -get
}

set_brightness() {
    xbacklight -steps 1 -set $1
}

fade_brightness() {
    xbacklight -time $fade_time -steps $fade_steps -set $1 &
}

trap "exit 0" INT TERM
# kill background processes and set the brightness back to the original value
trap "kill \$(jobs -p); set_brightness $(get_brightness);" EXIT
fade_brightness $min_brightness
sleep 2147483647 &
wait

terminal

xss-lock -n /path/to/dim-screen.sh -- xsecurelock auth_pam_x11 saver_blank