tempcheck on raspberry pi

tempcheck

#!/bin/bash
# vi /usr/bin/tempcheck
# */5 *   *   *   *    /usr/bin/tempcheck
# chmod 744 /usr/bin/tempcheck

#!/bin/sh
#  This script reads the Broadcom SoC temperature value and shuts down if it 
#  exceeds a particular value.
#  80oC is the maximum allowed for a Raspberry Pi.

# Get the reading from the sensor and strip the non-number parts
SENSOR="`/opt/vc/bin/vcgencmd measure_temp | cut -d "=" -f2 | cut -d "'" -f1`"
#echo $SENSOR
# -gt only deals with whole numbers, so round it.
TEMP="`/usr/bin/printf "%.0f\n" ${SENSOR}`"
# How hot will we allow the SoC to get?
MAX="78"

if [ "${TEMP}" -gt "${MAX}" ] ; then
# This will be mailed to root if called from cron
echo "${TEMP}şC is too hot!"
# Send a message to syslog
/usr/bin/logger "Shutting down due to SoC temp ${TEMP}."
# Halt the box
/sbin/shutdown -h now
else
exit 0
fi