Demo of simple way to get file/line in node.js

simplefileline.js

var path = require('path');
function getfileline(stacklevel) {
	var index = stacklevel || 2;
	var stacklist = (new Error().stack).split('\n')[index];
	// regexps borrowed from "tracer" in npm
	var stackReg = /at\s+(.*)\s+\((.*):(\d*):(\d*)\)/gi;
	var stackReg2 = /at\s+()(.*):(\d*):(\d*)/gi;
	var sp = stackReg.exec(stacklist) || stackReg2.exec(stacklist);
	var result = {
		func: sp[1],
		filename: path.basename(sp[2]),
		fullfile: sp[2],
		path: path.dirname(sp[2]),
		line: sp[3]
	};
	return result;
}

function mylog() {
	var traceobj = getfileline(3);
	console.log(traceobj);
}

function tryit() {
	mylog();
}

tryit();

Just a test... I'll probably pull stuff out into a small module.