bash | Death by Logic

This is a simple bash script, that took way to long to get correct, to unexport all the of exported gpio pins on your BeagleBone board at once.

#!/bin/bash
GPIO=/sys/class/gpio/*
UEXT=/sys/class/gpio/unexport

for file in $GPIO
do
  if [[ $file =~ (.*)(gpio)([0-9]+) ]]
  then
    echo "unexporting gpio${BASH_REMATCH[3]}"
    echo "${BASH_REMATCH[3]}" > $UEXT
  fi
done

#!/bin/bash

GPIO=/sys/class/gpio/*

UEXT=/sys/class/gpio/unexport

for file in $GPIO

if [[ $file =~ (.*)(gpio)([0-9]+) ]]

then

echo "unexporting gpio${BASH_REMATCH[3]}"

echo "${BASH_REMATCH[3]}" > $UEXT

done

Death by Logic

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Tag Archives: bash

BealgeBone unexport gpio script