Demonstrate different error codes being thrown depending on platform when attempting to write to a read-only file

eacces-eperm-inconsistency.js

const fs = require('fs');
const path = require('path');

const code = '444';
const filename = '00000';
const content = 'abcdefghijklmnopqrstuvwxyz';
const filePath = path.join(__dirname, filename);

// set up a read-only file
fs.writeFileSync(filePath, content);
fs.chmodSync(filePath, '444');

fs.writeFile(filePath, content, function (err) {
  throw err;
});