ma_capsblinker_shell

#!/bin/sh -e
# Ma_Sys.ma Caps Lock Blinking Script 1.0.0, Copyright (c) 2018 Ma_sys.ma.
# For further info send an e-mail to Ma_Sys.ma@web.de.

# It is required to run this script as root. It should not have an effect
# on the actual caps seen under X11. Cancel with CTRL-C at any time.
# -> see: https://superuser.com/questions/362694/
# 				use-caps-lock-led-as-hdd-led-or-custom-indicator


dev=/dev/tty1

if [ "$1" = "--help" ]; then
	head -n 3 "$0" | tail -n 2 | cut -c 3-
	echo
	echo "USAGE $0 [device]"
	exit 0
elif [ -n "$1" ]; then
	dev="$1"
fi

trap "setleds -caps < \"$dev\"; echo" INT TERM EXIT

# sleep with . not portable...

while true; do
	setleds +caps < "$dev"
	sleep 0.02
	setleds -caps < "$dev"
	sleep 0.98
done