shutdown/shutdown-button.sh

   1 #!/bin/bash
   2
   3 # monitor GPIO pin 17 for shutdown signal
   4
   5 # export GPIO pin 17 and set to input with pull-up
   6 echo "17" > /sys/class/gpio/export
   7 echo "in" > /sys/class/gpio/gpio17/direction
   8 echo "high" > /sys/class/gpio/gpio17/direction
   9
  10 # wait for pin to go low
  11 while [ true ]
  12 do
  13 if [ "$(cat /sys/class/gpio/gpio17/value)" == '0' ]
  14 then
  15  echo "Raspberry Pi Shutting Down!"
  16  #halt &
  17  shutdown -h now
  18  exit 0
  19 fi
  20 sleep 1
  21 done