Instructions for using the fs.fstat method in node.js_node.js

Method description:

Get file information based on file descriptor.

Grammar:

Copy code The code is as follows:

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

Since this method belongs to the fs module, the fs module needs to be introduced before use (var fs= require(“fs”) )

Receive parameters:

fd File descriptor

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

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

Copy code The code is as follows:

{

dev : 0 ,

mode: 33206,

nlink : 1 ,

uid : 0 ,

gid : 0 ,

rdev : 0 ,

ino : 0 ,

size: 378 (bytes) ,

atime : Tue Jun 10 2014 13:57:13 GMT 0800 ,

mtime : Tue Jun 13 2014 09:48:31 GMT 0800 ,

ctime : Tue Jun 10 2014 13:57:13 GMT 0800

}

Example:

Copy code The code is as follows:

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:

Copy code The code is as follows:

fs.lstat = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
binding.lstat(pathModule._makeLong(path), callback);
};