Instructions for using the fs.fsync method in node.js

Method description:

Synchronize the disk cache.

Grammar:

fs.fsync(fd, [callback(err)])

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

Receiving parameters:

Fd                            File descriptor

Callback        Callback, passing an exception parameter err

Example:

var fs = require('fs');

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

 if(err){

  throw err;

 }

 console.log('file open');

 fs.fsync(fd, function(err){

  if(err){

   throw err;

  }

  console.log('done');

  fs.close(fd,function(err){

   if(err){

    throw err;

   }

   console.log('file closed');

  })

 })

})

Source:

fs.fsync(fd, callback)fs.fsync = function(fd, callback) {

  binding.fsync(fd, makeCallback(callback));

};