Ok so once again im back with what is probably a beginner question although somewhat more complicated (for me) than the last.

Background:
A client has a daily backup which is carried out via rsync.
Due to this, when they move a file around that file is then coppied a second time.
On top of this, when a file is deleted off of the client server it isnt deleted off of the backup server. (Rsync options i believe)

Im am working on a script that does the following:

Entities:
1. Client File Server (A)
2. Offsite Backup Server (B)

Current:
1. Backup sync runs daily.
2. Changed / new files on A in comparison to B are replaced / copied onto B.
3. Deleted files on A are ignored in this process

Proposed:
Additional script created to do the following:
1. Created a file of all files currently on A.
2. Compare with a file of all files currently on B.
3. If:
a) A has a file B doesn't < Warning report on email
b) B has a file A doesn't < Mark for deletion
c) A has a modified file to B < Warning report on email
4. Do the following:
-i < Identify / Create a report with what would have been deleted
5. If no restriction is placed then delete.

Thoughts:
1. Rsync with option delete files on B that are no longer on A

2. Personal script.
Methods within script:
Main
< Call method

Creation
< Create A file
< Create B file

Comparison
< Check for discrepancies between files
< Create file with discrepancies

Output
< Send error messages to unison email account
< Display files to be deleted on screen then delete

Outputed Email:
1. No. files processed
2. List of deleted files + size for deletion
3. Total deleted size
4. Errors/Warnings

< Email sent regardless of parameter selected or not.

So far this is what i have:

Code:

#!/bin/sh

#Initalise Variables
clientDIR=0
backupDIR=0
clientFile=0
backupFile=0
dateStamp=0
saveLocation=0

#1. Create client file:
clientDIR=/home/[USR]/
dateStamp=`date +%d-%m-%Y`
saveLocation=/home/root/scripts
clientFile=$saveLocation/clientFile@$dateStamp.txt

cd $clientDIR
for i in "$clientDIR"
do
       ls -lstR > $clientFile
done

#2. Create backup file:
#ssh to offsite backup location using key rather than pw
#backupFile=insert ssh login without pw using key to ip + /backupFile@$dateStamp.txt

#TEMP TEST FILE
backupFile=$saveLocation/backupFile@$dateStamp.txt

cd $clientDIR
for i in "$clientDIR"
do
        ls -lstR > $backupFile
done

#3: To compare files:
#cmp <- Compare two files
#Not working

#comm <- Compare two sorted files line by line
#Not working

#diff <- Display the differences between two files
diff -y $clientFile $backupFile > $saveLocation/diffOutput@$dateStamp.txt
#diff command doesnt recognise files due to order....

#4: If:
#       a) A has a file B doesn't < Warning report
#       b) B has a file A doesn't < Mark for deletion
#       c) A has a modified file to B < Warning report

#5. Do the following:
#       -i < Identify / Create a report with what would have been deleted

#6. If no restriction is placed then delete.

echo "Done <- Debugging"

So what i need from you guys will be a fair bit of help (i think) but if we can start with how i can compare the files generated. ATM with the diff command due to files being in a different order with the backup server having more files than the client, naturally the file lines wont match up.

Is there an easier way to do this? Any help is appreciated. Feel free to tell me im going the wrong way about this and to try something else.

Many regards and sorry to any that read this super long post,
Regards,
John Crombie