#!/bin/sh
MAILDIR=/home/sam/Mail
FILE="$MAILDIR"/from
CACHE="$MAILDIR"/.lastmail
SIZE=`ls -l "$FILE"  | tr -s ' ' | cut -d' ' -f5`
OLDSIZE=`<$CACHE`
DIFF=`expr $SIZE - $OLDSIZE`
tail -c $DIFF $FILE
if [ $# == 0 ]
then
	echo $SIZE > $CACHE
fi