var fs = require("fs");var log = function(msg) {    console.log(msg);}function copyFile(source, destination) {    if (fs.existsSync(source)) {        var rOption = {            flags: 'r',            encoding: null,            mode: 0666        }        var wOption = {            flags: 'a',            encoding: null,            mode: 0666        }        var stream = fs.createReadStream(source, rOption);        var writable = fs.createWriteStream(destination);        stream.pipe(writable, wOption);        writable.on('close', function() {            log('done');        });        // fs.rename(source, destination,function(){
            //     console.log("ok");        // });    }}//copyFile("F:\\video\\阿甘正传(1).rmvb", "D:\\阿甘正传(1).rmvb");function copyDir(dir1, dir2) {    if (!fs.existsSync(dir2)) {        fs.mkdirSync(dir2);    }    var files = fs.readdirSync(dir1);    for (var i in files) {        var file = files[i];        file1 = dir1 + "\\" + file;        file2 = dir2 + "\\" + file;        var sta = fs.statSync(file1);        if (sta.isDirectory()) {            copyDir(file1, file2);        } else {            copyFile(file1, file2);        }    }}copyDir("D:\\VM\\centos", "f:\\ttt")