speedfans

#!/usr/bin/env bash
IPMIHOST=192.168.1.100
IPMIUSER=operator
IPMIPW=1234
IPMIEK=0000000000000000000000000000000000000000

FANSPEEDHEX="0xA"
MAXTEMP=60
HYSTERESIS=5

INTERVAL=5

function ipmi() {
        ipmitool -I lanplus -H "$IPMIHOST" -U "$IPMIUSER" -P "$IPMIPW" -y "$IPMIEK" "$@"
}

function auto_fans() {
	ipmi raw 0x30 0x30 0x01 0x01
}

function manual_fans() {
	ipmi raw 0x30 0x30 0x01 0x00 
	ipmi raw 0x30 0x30 0x02 0xff "$FANSPEEDHEX"
}

function emergency() {
	# insert here what should happen when the sensor readings fail.
	auto_fans
	exit 1
}

function d_start() {
	while sleep $INTERVAL
	do

		if ! TEMPS=$(ipmi sdr type temperature | grep -vi inlet | grep -vi exhaust | grep -Po '\d{2,3}' 2>&1); then
			# Emergency
			echo "problem with reading the temperature"
			emergency
		fi
		
		HIGHTEMP=0
		LOWTEMP=1
		MSG="TEMPS"
		for TEMP in $TEMPS; do

			MSG+=" $TEMP"

			if [[ $TEMP > $MAXTEMP ]]; then
				HIGHTEMP=1
			fi
			if [[ $TEMP > $((MAXTEMP - HYSTERESIS)) ]]; then
				LOWTEMP=0
			fi
		done

		echo $MSG

		if [[ $HIGHTEMP == 1 ]]; then
			#Automatic fan control
			auto_fans
		elif [[ $LOWTEMP == 1 ]]; then
			#Manual fan control
			manual_fans
		fi

	done
}

function d_stop() {
	emergency
}


case "$1" in
	start)
		d_start
	;;
	stop)
		d_stop
	;;
	restart)
		d_restart
	;;
	status)
		d_status
	;;
*)
esac