Creates a DOT Graph from PS Output http://dtrace.org/blogs/brendan/2011/10/04/visualizing-the-cloud example graph http://www.flickr.com/photos/phaus/9661447185/

plotPS.sh

#!/usr/bin/env node

var sys = require('sys')
var exec = require('child_process').exec;
var fs = require('fs');

var cmd;
switch(process.platform){
	case 'darwin':
		cmd = 'ps -A -c -o pid,ppid,pcpu,comm,uid -r';
		break;
}

function parse(line){
	var parts = line.split(" ");
	var out = [];
	var c = 0;
	for(var i in parts){
		if(parts[i].trim().length > 0){
			out[c] = parts[i].trim();
			c++;
		}
	}
	return out;
}

function header(){
	console.log("graph G {");
	console.log("layout=twopi;");
	console.log("rankdir=TB;");
	console.log("nodesep=5.0;");
	console.log("ratio=auto;");
	console.log("ranksep=15.0;");
	console.log("root=\"0\";");
	console.log("0 [label=\"0\"]");	
}

function scanCli(error, stdout, stderr) { 
	if (error) {
		return console.log(error);
  	}	
  	header();
	var lines = stdout.split("\n");
	for(var c in lines){
		if(lines[c].length > 0 && c > 0){
			var parts = parse(lines[c]);
			var entry = {
				pid: parts[0].trim(),
				ppid: parts[1].trim(),
				pcpu: parts[2].trim(),
				cmd: parts[3].trim(),
				uid: parts[4].trim()
			};
			console.log(entry.pid+" [label=\""+entry.cmd+" ("+entry.uid+")\"]");
			console.log(entry.ppid+" -- "+entry.pid);
		}
	}
	console.log("}");
}

function scanFile(err,data){
	if (err) {
		return console.log(err);
  	}
	header();
	var lines = data.split("\n");
	for(var c in lines){
		if(lines[c].length > 0 && c > 0){
			var parts = parse(lines[c]);
			var entry = {
				pid: parts[0].trim(),
				ppid: parts[1].trim(),
				pcpu: parts[2].trim(),
				cmd: parts[3].trim(),
				uid: parts[4].trim()
			};
			console.log(entry.pid+" [label=\""+entry.cmd+" ("+entry.uid+")\"]");
			console.log(entry.ppid+" -- "+entry.pid);
		}
	}
	console.log("}");	
}

if(process.argv.length == 2){
	exec(cmd, scanCli);	
} else {
	fs.readFile(process.argv[2], 'utf8', scanFile);	
}