index.js

'use strict';

var spawn = require('child_process').spawn;

var cpu = require('./available-configs/cpu.json');
// Use Gnu stdbuf to avoid buffering from commands
var child = spawn('stdbuf', ['-oL', 'bash', '-c', cpu.command]); 
    
child.stdout.on('data', function(data) {
    process.stdout.write(data);
});

child.stderr.on('data', function(data) {
    process.stderr.write(data);
});

child.on('close', function(code) {
    if(code !== 0) {
        console.log(`exited with error code ${code}`);
    }
});

child.on('error', function(err) {
    console.log(`Failed to start process.`);
    console.log(err);
});