get-stdin 
Easier stdin
Install
$ npm install --save get-stdin
Usage
// example.js
var stdin = require('get-stdin');
stdin(function (data) {
console.log(data);
//=> unicorns
});
$ echo unicorns | node example.js
unicorns
API
stdin(callback)
Get stdin as a string.
stdin.buffer(callback)
Get stdin as a buffer.
License
MIT © Sindre Sorhus