zzip_opendir, zzip_opendir_ext_io - start usage.

        Guido Draheim <guidod@gmx.de>

        Copyright (c) Guido Draheim, use under copyleft (LGPL,MPL)

zziplib                                              0.13.78                                     zzip_opendir(3)

        The zzip_opendir function is the equivalent of opendir(3) for a realdir or zipfile.

        The zzip_opendir function has some magic - if the given argument-path is a directory, it will wrap a
       real opendir(3) into the ZZIP_DIR structure. Otherwise it will divert to zzip_dir_open which can also
       attach a ".zip" extension if needed to find the archive.

        the error-code is mapped to errno(3).

        The zzip_opendir_ext_io function uses explicit ext and io instead of the internal defaults, setting them
       to zero is equivalent to zzip_opendir

       zzip_opendir, zzip_opendir_ext_io -  start usage.

#include<zzip/lib.h>

       ZZIP_DIR*
       zzip_opendir(zzip_char_t* filename)

       ZZIP_DIR*
       zzip_opendir_ext_io(zzip_char_t* filename, int o_modes, zzip_strings_t* ext, zzip_plugin_io_t io)