Creates BASH aliases for toggling laptop touch devices ON/OFF

tpoff.sh

#!/usr/bin/env bash
# tpoff.sh v1.0.9 - Sunday, February 9, 2020
# Create commands (aliases) to toggle touch devices ON/OFF

XINPUT=/usr/bin/xinput
if [ -x $XINPUT ]; then
	DEVNAMES=()
	DEVNAMES+=("Synaptics TouchPad")
	DEVNAMES+=("AlpsPS/2 ALPS DualPoint TouchPad")
	DEVNAMES+=("AlpsPS/2 ALPS DualPoint Stick")
	LEN=${#DEVNAMES[@]}
	i=0
	while [ $i -lt $LEN ]; do
		DEVICE_ID=$($XINPUT --list |grep "${DEVNAMES[$i]}" |cut -d'=' -f2 |awk '{print $1}')
		if [ ! -z $DEVICE_ID ]; then
			OFF+="$XINPUT disable $DEVICE_ID; "
			ON+="$XINPUT enable  $DEVICE_ID; "
		fi
		(( i++ ))
	done
	if [[ ! -z $OFF ]]; then
		alias tpoff="$OFF"
		alias tpon="$ON"
	fi
	unset LEN OFF ON DEVICE_ID DEVNAMES
fi