mousemon.sh - Disable mouse when locking the screen Ubuntu

mousemon.sh

#!/bin/bash

# mousemon.sh - Andrey Cizov (acizov@gmail.com) 2018 (no license applied, free to use on any terms)
# 
# Sometimes you'd like to have more control on what toggles the screensaver on your Ubuntu.
# In my scenario the mouse is too sensitive, so whenever I lock the screen subsequently turning
# off the monitors - it's too easy to turn them back on by accidentally touching the mouse.
# Even mildly loud bass is enough to do so.

# This script disables a selected device whenever the lock screen is activated.

# To run this script on login - I suggest using startup-settings utility located here:
# https://github.com/hant0508-zz/startup-settings

# use `xinput list` to find the required device
# prepend the name with `pointer:` to be more specific (my mouse also receives a keyboard ID, but we do not want this)
mouse="pointer:Laview Technology Mionix Avior 7000"

function switch {
  xinput --set-prop "$mouse" "Device Enabled" "$1"
}

function cleanup {
  switch "1"
}

trap cleanup EXIT

dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'" | ( while read line; do
    if echo $line | grep "boolean true" &> /dev/null; then
        switch "0"
    else
        switch "1"
    fi
done )