#!/bin/sh

PIN=$1
VALUE=$2

PIN_FILE=/sys/class/gpio/gpio$PIN

if [ -z "$PIN" -o -z "$VALUE" ]; then
    exit 1
fi

echo $PIN >/sys/class/gpio/export

if [ $(cat $PIN_FILE/direction) = "out" ]; then
    echo $VALUE >$PIN_FILE/value
fi

echo $PIN >/sys/class/gpio/unexport