#!/bin/bash
#
# Nagios plugin to check slapd schema
# 
# Author : Benjamin Renard <brenard@easter-eggs.com>
# Date : Wed, 12 Jun 2019 13:15:33 +0200
# Source : http://gogs.zionetrix.net/check_slapd_schema
#

SUDO_USER=""
SLAPSCHEMA=slapschema
DB_ID=""
DB_BASEDN=""
DEBUG=0

function debug() {
	if [ $DEBUG -eq 1 ]
	then
		>&2 echo -e "[DEBUG] $1"
	fi
}

function usage() {
	cat << EOF
Usage : $0 [-d] [-h] [options]
	-u			Sudo as specified user to run slapschema
	-s			Path to slapschema (Default : auto-detected)
	-n			Slapd database ID (Default : auto-detected)
	-b			Slapd database base DN (Default : auto-detected)
	-d			Debug mode
	-h 			Show this message
EOF
}

while getopts "hu:s:n:b:d" OPTION
do
	case $OPTION in
		u)
			SUDO_USER=$OPTARG
		;;
		s)
			SLAPSCHEMA=$OPTARG
		;;
		n)
			DB_ID=$OPTARG
		;;
		b)
			DB_BASEDN=$OPTARG
		;;
		d)
			DEBUG=1
		;;
		h)
			usage
			exit 0
		;;
		*)
			echo "Unkown option '$OPTION'"
			usage
			exit 1
	esac
done

CMD="$SLAPSCHEMA"
[ -n "$DB_ID" ] && CMD="$CMD -n $DB_ID"
[ -n "$DB_BASEDN" ] && CMD="$CMD -b $DB_BASEDN"
debug "slapschema command = '$CMD'"

if [ -n "$SUDO_USER" ]
then
	debug "run slapdschema command as $SUDO_USER"
	ERRORS=$( sudo -u $SUDO_USER $CMD 2>&1 > /dev/null )
	EXITCODE=$?
else
	ERRORS=$( $CMD 2>&1 > /dev/null )
	EXITCODE=$?
fi
debug "Errors :\n$ERRORS"
debug "Exit code : $EXITCODE"

if [ $EXITCODE -ne 0 ]
then
	echo "UNKNOWN - slapschema exit with $EXITCODE"
	exit 3
elif [ -z "$ERRORS" ]
then
	echo "OK - no error detected in slapd schema"
	exit 0
else
	count=$( echo -e "$ERRORS"|wc -l )
	echo "WARNING - $count error(s) detected in slapd schema"
	echo -e "$ERRORS"
	exit 1
fi