Instructions for the fs.fchmod method in node.js

method description:

Change file permissions (file descriptors).

syntax:

fs.fchmod(fd, mode, [callback(err)])

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

receive parameters:

fd                           file descriptor

mode                 file permissions

callback           callback, passing the exception parameter err

example:

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

  if (err) {

    throw err;

  }

  fs.fchmod(fd, 0777, function(err){

 if (err) {

      throw err;

    }

 console.log('fchmod complete');

    fs.close(fd, function () {

      console.log('Done');

    });

  })

});

source code:

fs.fchmod = function(fd, mode, callback) {

  binding.fchmod(fd, modeNum(mode), makeCallback(callback));

};