Instructions for the fs.fstat method in node.js

method description:

Gets file information based on the file descriptor.

syntax:

fs.fstat(fd, [callback(err, stats)])

Since this method belongs to the fs module, it is necessary to introduce the fs module (var fs= require(" fs "))

before using it

receive parameters:

fd                           file descriptor

callback             callback, passing 2 parameters, exception parameter err and file information parameter stats

stats contains the following information :(the following information is the file information read in the case, not the default value)

{

 

 dev : 0 ,

 

 mode : 33206 ,

 

 nlink : 1 ,

 

 uid : 0 ,

 

 gid : 0 ,

 

 rdev : 0 ,

 

 ino : 0 ,

 

 size : 378( byte ) ,

 

 atime : Tue Jun 10 2014 13:57:13 GMT +0800 < Chinese standard time > ,

 

 mtime : Tue Jun 13 2014 09:48:31 GMT +0800 < Chinese standard time > ,

 

 ctime : Tue Jun 10 2014 13:57:13 GMT +0800 < Chinese standard time >

 

}

example:

var fs = require('fs');

fs.open('content.txt', 'a', function(err,fd){

 if(err){

  throw err;

 }

 console.log('file open');

 fs.fstat(fd, function(err, stats){

  if(err){

   throw err;

  }

  console.log(stats);

  fs.close(fd , function(){

   console.log('file close');

  })

 })

})

source code:

fs.lstat = function(path, callback) {

  callback = makeCallback(callback);

  if (!nullCheck(path, callback)) return;

  binding.lstat(pathModule._makeLong(path), callback);

};