nodejs(四)file System模块 解决Cross device link错误 EXDEV

 1 var fs = require('fs');
 2 
 3 /*cross device link
 4 fs.rename('c:\\err.LOG','d:\\err.LOG',function(err){
 5     console.log(err.code);
 6 });
 7 */
 8 
 9 move('c:\\err.LOG','d:\\err.LOG',function(err){
10     if(err) throw err;
11 });
12 
13 
14 function move(oldpath,newpath,callback){
15     fs.rename(oldpath,newpath,function(err){
16         if(err){
17             if(err.code === 'EXDEV'){
18                 copy();
19             }else{
20                 callback(err);
21             }
22         }else{
23             callback();
24         }
25     });
26 
27     function copy(){
28         var readStream = fs.createReadStream(oldpath);
29         var writeStream = fs.createWriteStream(newpath);
30         readStream.on('error',callback);
31         writeStream.on('error',callback);
32         readStream.on('close',function(){
33             fs.unlink(oldpath,callback);
34         });    
35     }
36 }