How do I calculate free disk space on Linux in JavaScript?

Question

How do I calculate free disk space on Linux in JavaScript?

I want calculate and display the free space of the home filesystem but there are 3-4 users, and all should be in javascript, how can we do ?

I know in linux shell , we can do :

df -h

But in javascript it's not

javascript
linux
node.js

Answer 1

Node diskusage will do this.

Copying their example code:

#!/usr/bin/env node
var disk = require('diskusage');

// get disk usage. Takes mount point as first parameter
disk.check('/', function(err, info) {
    console.log(info.free);
    console.log(info.total);
});

You'll need to install node (if you don't already have it) and fetch the node-diskfree package from npm of course.

Edit: switched to a cross platform package, that runs on all OSs and doesn't scrape command line tools.

Answer 2

What JavaScript environment are you using? NodeJS has a childprocess module that you can use to spawn a df command, see http://nodejs.org/api/child_process.html for more details.

I imagine that you're not attempting this in a browser based JavaScript sandbox.