Retrieves the name of another entry in the directory, or
The order of entries returned from this function is not defined,
and may vary by file system or other operating-system dependent factors.
NULL may also be returned in case of errors. On Unix, you can
errno to find out if
NULL was returned because of an error.
On Unix, the ‘.’ and ‘..’ entries are omitted, and the returned name is in the on-disk encoding.
On Windows, as is true of all GLib functions which operate on filenames, the returned name is in UTF-8.