#!/bin/sh

# Replace COMMANDE by mailq if you want both new and old messages listed
COMMANDE="/usr/sbin/sendmail -bp"
WARNING_REQ=10
CRITICAL_REQ=15
WARNING_SIZE=20000000
CRITICAL_SIZE=50000000


# 
# Fonction d'aide
#
usage() {
	cat <<EOF
Usage :
  $0 -h	
  $0 [-w warning_nb_mails] [-c critical_nb_mails] [-W warning_size] [-C critical_size]

Valeurs par défaut:
  warning_nb_mails: $WARNING_REQ
  critical_nb_mails: $CRITICAL_REQ
  warning_size: $WARNING_SIZE
  critical_size: $CRITICAL_SIZE
EOF
}

#
# Gestion des paramètres
#
while getopts hw:c:W:C: f; do
	case "$f" in
		'h')
			usage
			exit
			;;

		'w')
			WARNING_REQ="$OPTARG"
			;;

		'c')
			CRITICAL_REQ="$OPTARG"
			;;

		'W')
			WARNING_SIZE="$OPTARG"
			;;

		'C')
			CRITICAL_SIZE="$OPTARG"
			;;

		\?)
			usage
			exit 1
			;;
	esac
done


#
# Lancement de la commande
#
RESULT=$( $COMMANDE | grep -v "^[^A-Za-z0-9]" | grep -v "^[[:space:]]" | awk '{ print $2 }' )
# ... et analyse de la sortie
if [ -z "$RESULT" ]; then
	# Queue vide
	REQ=0
	SIZE=0
else
	REQ=$( echo "$RESULT" | wc -w )
	SIZE=0
	for i in $RESULT; do
		SIZE=$(( $SIZE + $i ))
	done
fi

#
# Analyse des résultats
#
if [ "$SIZE" -ge "$CRITICAL_SIZE" ] || [ "$REQ" -ge "$CRITICAL_REQ" ]; then
	RETURN_STATUS=2
	printf "CRITICAL ($REQ mail(s) in queue for $SIZE byte(s))"
else
	if [ "$SIZE" -ge "$WARNING_SIZE" ] || [ "$REQ" -ge "$WARNING_REQ" ]; then
		RETURN_STATUS=1
		printf "WARNING ($REQ mail(s) in queue for $SIZE byte(s))"
	else
		RETURN_STATUS=0
		printf "OK ($REQ mail(s) in queue for $SIZE byte(s))"
	fi
fi

printf " | req=%d;%d;%d size=%dB;%d;%d\n" "$REQ" "$WARNING_REQ" "$CRITICAL_REQ" "$SIZE" "$WARNING_SIZE" "$CRITICAL_SIZE"
exit $RETURN_STATUS