dummyfs.js

var sys = require("sys");

function dummyfs(root) {
    if (!root) root = "/"; // default to actual root ... probably should default to process owner's home instead
    this.dir = root;
}
// this is deprecated in future versions of node, in favor of: util.inherits(...)
sys.inherits(dummyfs, process.EventEmitter);
exports.dummyfs = dummyfs;

dummyfs.prototype.chdir = function(dir) {
    if(dir.charAt(dir.length-1) != "/") dir += "/";
    // this still might not be smart enough
    if(dir.charAt(0) != "/") {
        if(dir.substr(0,2) == "..") {
            x = dir.split("/");
            for(i=0; i<x.length; i++) {
                if(x[i] == "..") {
                    part = this.dir.split("/");
                    part.splice(part.length -2, 1);
                    ret = part.join("/");
                    if(ret.charAt(ret.length-1) != "/") ret += "/";
                    this.dir = ret;
                } else {
                    this.dir += x[i];
                }
            }
        } else {
            if(dir.substr(0,2) == "./") {
                this.dir += dir.substr(2,dir.length);
            } else {
                this.dir += dir;
            }
        }
    } else {
        this.dir = dir;
    }
    if(this.dir.charAt(this.dir.length-1) != "/") this.dir += "/";
    return(this.dir);
}

dummyfs.prototype.cwd = function() {
    return(this.dir);
}