#!/bin/sh
#
# Uncomment the 'set -x' if you wish to have this script
#	display BASH debug information as it runs
#set -x

XAMIME_DIR=/usr/local/xamime
LOGFILE=$XAMIME_DIR/logs/spamfilter.log
MAILPACK=$1 

# Spam Assassin binary and flags
if [ -f /usr/local/bin/spamassassin ]; then
SA=/usr/local/bin/spamassassin
elif [ -f /usr/bin/spamassassin ]; then
SA=/usr/bin/spamassassin
else
	echo "Unable to locate 'spamassassin' in either /usr/bin or /usr/local/bin" >> $LOGFILE
	exit 0
	fi

SA_PARAMS=" "

# Test the file size, if the email is > 250K, then don't bother
# scanning it.
FILESIZE=`ls -l $MAILPACK | awk '{print $5}'`
FILESIZE_LIMIT=250000

if [ $FILESIZE -gt $FILESIZE_LIMIT ]; then
	echo "$1: Mailpack greater than $FILESIZE_LIMIT bytes ( $FILESIZE : $MAILPACK )" >> $LOGFILE
	exit 0
fi


# Filter the mailpack through SpamAssassin - the output from
#	spamAssassin is the 'new' mailpack with the added headers.

$SA $SA_PARAMS < $MAILPACK > ${MAILPACK}.tmp
RETURN_CODE=$?

# Move the oroginal mailpack to $MAILPACK.org so that
#	we have a safety backup
#
# Then move the .tmp mailpack ( output from SA ) to our
#	original mailpack name

if [ -f ${MAILPACK}.tmp ]; then

	mv $MAILPACK $MAILPACK.org
	mv $MAILPACK.tmp $MAILPACK

fi

# We don't return SpamAssassin's exit code - because it returns non-zero
#	for when it finds spam, however, Xamime isn't interested in non-zero 
#	returns unless an error has occured.

exit 0