bash XRDP log monitor (raspberry pi / raspbian friendly script)

xrdpLogMonitor.sh

#!/bin/bash

# xrdpLogMonitor.sh <optional timeout in seconds>
# This script will check and spit out your xrdp log file every X seconds
# (default 30 if not specified)
# If the file size has changed since your last check, your terminal will beep (system alert)

logFileName="/var/log/xrdp.log"

if [ $# -eq 0 ];
then
    echo "No arguments supplied, will use default time between log polls (30 seconds)"
    secondsBetweenLogPolls=30
else
    echo "Using supplied timeout of $1 seconds between log polls"
    secondsBetweenLogPolls=$1
fi


function updateLogModifiedTimeAndBeepIfChanged()
{
    lastLogModifiedTime=$LogModifiedTime
    LogModifiedTime="$(stat --printf="%Z" $logFileName)"
    if [ "$LogModifiedTime" != "$lastLogModifiedTime" ];
    then
        echo NEW LOG ACTIVITY CAPTURED!!!!

        #Below line creates the terminal beep
        echo -ne '\a'
    fi
}

while [  1 -lt 2 ]; do
    updateLogModifiedTimeAndBeepIfChanged
    echo "$(ls -l $logFileName)"
    echo "Polling  logfile $logFileName which was last modified at $LogModifiedTime..."

    #You will need sudo on the pi to cat this xrdp log
    sudo cat $logFileName
	
    #Uncomment the following line to search, for example, for "USER:" and display only those lines that contain it:
    #sudo cat $logFileName | grep USER:

    echo "$(date) <--- this is now"
    sleep $secondsBetweenLogPolls
done