simple bash script to turn printer on

printer.sh

#!/bin/bash

PIN="26"

if [ ! -d "/sys/class/gpio/gpio$PIN" ]; then
  echo $PIN > /sys/class/gpio/export;
fi

if [ "`cat /sys/class/gpio/gpio$PIN/direction`" != "out" ]; then
  echo out > /sys/class/gpio/gpio$PIN/direction;
fi

case $1 in
on)
  echo "Turning printer on";
  echo 1 > /sys/class/gpio/gpio$PIN/value;
  ;;
off)
  echo "Turning printer off";
  echo 0 > /sys/class/gpio/gpio$PIN/value;
  ;;
esac