FreeBSD / FreeNAS script to send a status report containing CPU and HDD temps and status to a given email address. Tested on FreeNAS 9.1.0-RELEASE (based on FreeBSD 9-STABLE). Based on the script available at http://forums.freenas.org/threads/how-to-monitor-system-cpu-hdd-mobo-gpu-temperatures-on-freenas-8.2994/#post-38847.

temperature.sh

#! /usr/local/bin/sh

# Write email header to temp file
(
  echo "To: your@email"
  echo "Subject: System Temperatures INFO"
  echo " "
) > /var/cover

# Define adastat function, which writes drive activity to temp file
adastat () {
  CM=$(camcontrol cmd $1 -a "E5 00 00 00 00 00 00 00 00 00 00 00" -r - | awk '{print $10}')
  if [ "$CM" = "FF" ] ; then
  echo " SPINNING" >> /var/cover
  elif [ "$CM" = "00" ] ; then
  echo " IDLE" >> /var/cover
  else
  echo " UNKNOWN ($CM)" >> /var/cover
  fi
}

# Write some general information
echo System Temperatures - `date` >> /var/cover
cat /etc/version >> /var/cover
uptime | awk '{ print "\nSystem Load:",$10,$11,$12,"\n" }' >> /var/cover

# Write CPU temperatures
echo "CPU Temperature:" >> /var/cover
sysctl -a | egrep -E "cpu\.[0-9]+\.temp" >> /var/cover
echo >> /var/cover

# Write HDD temperatures and status
echo "HDD Temperature:" >> /var/cover
for i in $(sysctl -n kern.disks | awk '{for (i=NF; i!=0 ; i--) if(match($i, '/ada/')) print $i }' )
do
echo -n $i: `smartctl -a /dev/$i | awk '/Temperature_Celsius/{DevTemp=$10;} /Serial Number:/{DevSerNum=$3}; /Device Model:/{DevVendor=$3; DevName=$4} \
END {printf "%s C - %s %s (%s) - ", DevTemp,DevVendor,DevName,DevSerNum }'` >> /var/cover;
adastat $i;
done

# Send status email
sendmail -t < /var/cover
exit 0