Recording keystroke count in Linux

.bashrc

function keystroke-record() {
    sudo cat /dev/input/event5 >> /tmp/keyboard.log &
}

function keystroke-count() {
    echo $( echo "$( cat /tmp/keyboard.log | wc -c ) / 96" | bc -l ) 
}

function keystroke-reset() {
    sudo cat /dev/null > /tmp/keyboard.log
}