php - How to create a folder in site->default->files with write read permissions with Drupal? -

im working on ubuntu , need create folder in drupal's default->files folder write permission able add files folder later on.

here code i'm having,

please help.

drupal_mkdir('public://' . $new_dir . '/'); $file = file_copy($file, 'public://' . $new_dir . '/' . $file_name);

    drupal_mkdir('public://' . $new_dir , 0777);

if need recursive set third argument true.

update:

    $oldumask = umask(0);     drupal_mkdir("public://". $new_dir , 0777);     umask($oldumask);

Scrio