#!/bin/bash
# inspirado em http://www.vivaolinux.com.br/dicas/verDica.php?codigo=2432
#

FETCH=`fetchmail -c`
TOTAL=`echo $FETCH | awk '{ print $1 }'`
SEEN=`echo $FETCH | awk '{ print $3 }' | sed -e 's/(//'`
NEW=`echo "$TOTAL - $SEEN" | bc`
echo $NEW/$TOTAL