#!/bin/bash

USER="CHANGEME"
HOST="CHANGEME"	# hostname of your mail (the part after @)
TMP="/tmp/checkacc.$$"		# filename of tmp-file (use $$ in filename to
				# suppress race-conditions
ALIASES="/etc/aliases"	# path to your aliases file

ADD=""

VERSION="0.1-release"
DATE="Sun Apr 27 15:44:25 CEST 2003"

# ChangeLog
# Sun Apr 27 15:44:25 CEST 2003
# Benjamin Schieder <blindcoder@scavenger.homeip.net>
# - released V0.1-release

# --- NO NEED TO CHANGE ANYTHING BEYOND THIS LINE --- #

if [ ! -x `which egrep` ] ; then
	echo "ERROR! Can't find egrep on this system!"
	exit 1
fi

if [ ! -x `which perl` ] ; then
	echo "ERROR! Can't find perl on this system!"
	exit 1
fi

if [ "$HOST" == "CHANGEME" ] ; then
	echo "ERROR! checkaccs.sh has not yet been configured!"
	exit 1
fi

touch $TMP
if [ ! -w $TMP ] ; then
	echo "ERROR! Can't write to $TMP! Please check!" >&2
	exit 1
fi

if [ ! -r $ALIASES ] ; then
	echo "ERROR! Can't read $ALIASES!" >&2
	exit 1
fi

STDIN="/dev/fd/0"
if [ ! -r $STDIN ] ; then
	STDIN="/dev/stdin"
	if [ ! -r $STDIN ] ; then
		echo "ERROR! Can't access /dev/fd/0 or /dev/stdin! Can't continue!" >&2
		exit 1
	fi
fi

cat $STDIN > $TMP

accs=`grep $USER $ALIASES | tr ':' '	' | cut -f1 `
accs="$USER $accs"

for x in $accs ; do
	if egrep -iq "^(To|CC):.*$x\@$HOST" $TMP ; then
		rm -rf $TMP
		exit 1
	fi
done

for x in $ADD ; do
	if egrep -iq "^(To|CC):.*$x" $TMP ; then
		rm -rf $TMP
		exit 1
	fi
done

cat $TMP | perl -e "while (<STDIN>) { s/^Subject/X-Suspicious: yes\nSubject/; print; }"

rm -f $TMP
exit 0