Node.js sys pump

var spawn=require('child_process').spawn,
  pump=require('sys').pump;

var cat=spawn('cat');
cat.stdin.write('hello ');


setTimeout(function(){
  cat.stdin.end('bye\n');
}, 2000);//from   w  w  w.  ja  va 2 s  .  c o  m

pump(cat.stdout, process.stdout);