#!/bin/bash
# Very Mickey Mouse as when a bash script is run as a background task in a putty session it doesn't receive SIGWINCH
# so you'd need to send the signal to the script's pid using kill -28.  But i hardly ever resize a putty session
# so no biggy. I think xterm does receive it though.
# Print temp & power status in the top right-hand corner of the tty/console/terminal window
# using vcgencmd for temp & Gordon henderson's gpio utility for power.

export XPos
trap 'get_xposition' SIGWINCH
get_xposition() {
  tput clear
  columns=`tput cols`
  export XPos=$(($columns-14))
}
get_xposition
gpio -g mode 35 input
OkColour=`tput setaf 2`
UhOhColour=`tput setaf 1`
Reset=`tput sgr0`

while :
do
  temperature=`vcgencmd measure_temp | awk -F'=' '{print $2}'`
  lowpower=`gpio -g read 35`
  tput sc
  tput cup 0 $XPos
  if [ `echo $temperature | awk -F'.' '{print $1}'` -lt 70 ]; then
     echo -n $OkColour$temperature $Reset
  else
     echo -n $UhOhColour$temperature $Reset
  fi
  if [ $lowpower -eq 0 ]; then
    echo -n  $UhOhColour"LOW"$Reset
  else
    echo -n $OkColour" OK"$Reset
  fi
  tput rc
  sleep 1
done