#! /bin/sh

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin

PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
REVISION="1.0.0"

. $PROGPATH/utils.sh


print_usage() {
	echo "Usage: $PROGNAME [ Temperature sensor name's. eg. 'CPU temp' ]"
}

print_revision() {
	echo "$PROGNAME"
	echo "Nagios plugin to monitor the values of sensors detected by lm_sensors package"
	echo "Version: $REVISION"
	echo "Egidio Garbin - http://www.gnu.org/licenses/gpl-2.0.txt"
}

print_help() {	
	echo ""
	print_usage
	echo ""
	echo "This plugin checks hardware status using the lm_sensors package."
	echo "First configure lm_sensors with your rights parameters. eg. /etc/sensors"
	echo "Report OK if all ok or CRITICAL state if an alarm was detected."
	echo ""
	print_revision
	echo ""
	support
	exit 0
}

case "$1" in
	--help)
		print_help
		exit 0
		;;
	-h)
		print_help
		exit 0
		;;
	--version)
   		print_revision
		exit 0
		;;
	-v)
		print_revision
		exit 0
		;;
	*)
		
		type sensors >& /dev/null
		RET=$?
		if [ "$RET" -eq 0 ] ; then
			if [ -n "$1" ] ; then
				TEMP=$(sensors | grep "$1" | grep -Eo "[0-9]{1,}")
				CTEMP=$(echo $TEMP | cut -d' ' -f1)
				LTEMP=$(echo $TEMP | cut -d' ' -f2)
				HTEMP=$(echo $TEMP | cut -d' ' -f3)
				
				if [ "$CTEMP" -gt "$HTEMP" ] || [ "$CTEMP" -lt "$LTEMP" ] ; then
					WRONG=1
				fi
			fi	
			ALARM=$(sensors | grep ALARM | cut -d' ' -f1 | sed s/://g)
			if [ -z "$ALARM" ] && [ -z "$WRONG" ] ; then
				echo "OK SENSORS"
				exit 0			
			else		
				# TEMP AND ALARM
				if [ -n "$WRONG" ] && [ -n "$ALARM" ] ; then
					echo -e "CRITICAL TEMP and ALARM\nTEMPERATURE IS $CTEMP\nALARM ON:\n$ALARM"
					exit 2
				# TEMP
				elif [ -n "$CTEMP" ] ; then
					echo -e "CRITICAL - TEMPERATURE IS $CTEMP"
					exit 2
				# ALARM
				elif [ -n "$CHECK" ] ; then 
					echo -e "CRITICAL - ALARM ON:\n$ALARM"
					exit 2
				fi
			fi
		else
			echo "SENSORS UNKNOWN - Command not found"
			exit -1
		fi
		;;
esac