#!/bin/bash

rm -f winfile*

while true; do
    smbclient //pc-name/shared-folder-name -c 'dir ' -U=user%password > winfiles 2> /dev/null

    if (( $? == 0 )); then
        awk '{ print $1 }' winfiles | sed '$ d' > winfiles1
    fi

    sleep 8
done &

sleep 2 

while true; do
    cp winfiles1 winfiles2
    sleep 1
    diff winfiles1 winfiles2 > /dev/null 2>&1

    if (( $? == 1 )); then
        notify-send 'the folder changed'
    fi
done