toggle-touchpad

#!/bin/bash
xi_dev_id() {
	xinput | sed -n "s/.*$1.*id=\\([0-9]\\+\\).*/\1/p"
}

xi_prop_id() {
	xinput list-props $1 | sed -n "s/.*$2.*(\\([0-9]\\+\\).*/\1/p"
}

xi_prop_get() {
	xinput list-props $1 | sed -n "s/.*$2.*\t\(.*\)$/\1/p"
}

xi_prop_set() {
	local propid=`xi_prop_id $1 "$2"`
	xinput set-int-prop $1 $propid 8 $3
}

deven='Device Enabled'
touchpad=`xi_dev_id Synaptics`
trackpoint=`xi_dev_id TrackPoint`

set_stat() {
	local newstat=$1
	echo "newstat=$newstat"
	xi_prop_set $touchpad "$deven" $(((newstat & 2) >> 1))
	xi_prop_set $trackpoint "$deven" $((newstat & 1))
}

case $1 in
	none)
		set_stat 0
		;;
	trackpoint)
		set_stat 1
		;;
	touchpad)
		set_stat 2
		;;
	both)
		set_stat 3
		;;
	toggle)
		stat=$(((`xi_prop_get $touchpad "$deven"` << 1) |`xi_prop_get $trackpoint "$deven"`))
		echo "stat=$stat"
		set_stat $(((stat + 1) % 4))
		;;
	*)
		echo "Usage: ${0##*/} none|trackpoint|touchpad|both|toggle"
		;;
esac