#!/bin/bash

repeat()
{
   for i in "${files[@]}"
   do

     md5two+=( "$(md5sum $i | awk '{ print $1 }' )" )

   done
 
}

diff(){
  awk 'BEGIN{RS=ORS=" "}
       {NR==FNR?a[$0]++:a[$0]--}
       END{for(k in a)if(a[k])print k}' <(echo -n "${!1}") <(echo -n "${!2}")
}

result()
{
   # Declare two associative arrays
   declare -A temp1 temp2


        for element in "${md5one[@]}"
        do
                ((temp1[$element]++))
        done

        for element in "${md5two[@]}"
        do
                ((temp2[$element]++))
        done

        for element in "${!temp1[@]}"
        do
                if [[ ${temp1[$element]} > 1 && ${temp2[$element]} > 1 ]]
                then
                        unset "temp1[$element]" "temp2[$element]"
                fi
        done

        Array3=($(diff temp1[@] temp2[@]))
        #echo -e "${Array3[@]}"
 
}
 
display(){
   clear
   echo -e "It should be here right?\n\n"
   diff
   echo -e '\a'
   echo -e "${Array3[@]}"

}
 
# Make sure user is logged in as root
if [[ $EUID -ne 0 ]]; then

   echo "This script must be run as root" 1>&2
   exit 1

fi

# Get names of all modules
files=`find / -name "*.ko"` >> /tmp/mod0

# Read names of modules from temp file into array
while read line ;
do
        FILEZ[$files]="$line"
        files=$(($files+1))

done < /tmp/mod0

rm /tmp/mod0

# Get md5 hashes of all modules on the system and put them in an array
for i in "${files[@]}"
do

     md5one+=( "$(md5sum $i | awk '{ print $1 }' )" )

done

# Forever loop to keep monitoring constant
for ((  ;  ; ))
do
        repeat

        if [[ ${md5one[@]} == ${md5two[@]} ]]; then

                md5two=( )
        else
                monitor
                md5one=( )
                md5one=("${md5two[@]}")
                md5two=( )
        fi

done