Keeping Tabs On Multiple Spawned Processes in NodeJS

Spawner.js

//First make placeholders for results as globals
results = {}
processes = {}

//Now Spawn Processes within code you need, where index is an identifier
spawn_list[index] = spawn(/*file here*/)
processes[index] = spawn_list[index].pid
results[processes[index]] = {}
results[processes[index]]['index'] = index //funny looking but important
results[processes[index]]['stdout'] = ""
results[processes[index]]['stderr'] = ""
	
spawn_list[index].stdout.on('data',function(data){results[processes[index]]['stdout'] += data})
spawn_list[index].stderr.on('data',function(data){results[processes[index]]['stderr'] += data})
	
spawn_list[page_name].on('exit',function(code)
{
	this_pid = this.pid
	console.log(this_pid)
	console.log(code)
	stdout = results[this_pid]['stdout']
	stderr = results[this_pid]['stderr']
	this_index = results[this_pid]['index']
	end_time = new Date().getTime()
	big_out = {'out':stdout,'outerr':stderr}
	//do something with bigoutput
        //......
        //Clean up, clean up, everybody clean up
	delete processes[this_index];		
	delete spawn_list[this_index];
	delete results[this_index];		
		
		
})