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

 var fs = require('fs');

 /*cross device link
 fs.rename('c:\\err.LOG','d:\\err.LOG',function(err){
     console.log(err.code);
 });
 */

 move('c:\\err.LOG','d:\\err.LOG',function(err){
     if(err) throw err;
 });

 function move(oldpath,newpath,callback){
     fs.rename(oldpath,newpath,function(err){
         if(err){
             if(err.code === 'EXDEV'){
                 copy();
             }else{
                 callback(err);
             }
         }else{
             callback();
         }
     });

     function copy(){
         var readStream = fs.createReadStream(oldpath);
         var writeStream = fs.createWriteStream(newpath);
         readStream.on('error',callback);
         writeStream.on('error',callback);
         readStream.on('close',function(){
             fs.unlink(oldpath,callback);
         });
     }
 }