#!/bin/ksh

maxtemp=30
#maxtemp=32

hour=`date +%Y-%m-%d-%H`
second=`date +%H:%M:%S`

bomb() {
	echo error: $@
	exit 1
}

alarm() {
	if [[ -f /var/tmp/alert-cpu-temperature-$hour.lock ]]; then
		echo $temp >> /var/tmp/alert-cpu-temperature-$hour.lock
	else
		echo $temp > /var/tmp/alert-cpu-temperature-$hour.lock
		echo cpu temperature $temp above threshold $maxtemp
	fi
}

clear_alarm() {
	if [[ -f /var/tmp/alert-cpu-temperature-$hour.lock ]]; then
		echo cpu temperature back to normal: $temp
		mv -f /var/tmp/alert-cpu-temperature-$hour.lock /var/tmp/alert-cpu-temperature-$second.lock.disabled
	fi
}

float temp=`sensors | grep ^Tctl: | awk '{print $2}' | sed -r 's/\+([[:digit:]\.]+).*/\1/'`

[[ -z $temp ]] && bomb could not evaluate cpu temperature - \$temp is empty

if (( temp >= maxtemp )); then
	alarm
else
	clear_alarm
fi