#!/bin/bash

synclient=/usr/bin/synclient
prop='TouchpadOff'

if ! [ -x "$synclient" ]; then
    exit 2
fi

state=$(${synclient} -l \
    | grep "^    ${prop}" \
    | sed 's/^.*= \([01]\)$/\1/g' \
    | head -n 1)

if [ -z "$state" ] || $(echo "$state" | grep -vq '^[01]$') ; then
    exit 1
fi

nState=$((($state + 1) % 2))
$synclient "$prop=$nState"