zip_register_cancel_callback_with_state — allow cancelling during zip_close

       Dieter Baron <dillo@nih.at> and Thomas Klausner <wiz@gatalith.at>

Debian                                            June 18, 2022       ZIP_REGISTER_CANCEL_CALLBACK_WITH_STATE(3)

       This function can be used to cancel writing of a zip archive during zip_close(3).

       The zip_register_cancel_callback_with_state() function registers a callback function callback for the zip
       archive archive.  The ud_free function is called during cleanup for deleting the userdata supplied in ud.

       The callback function is called during zip_close(3) in regular intervals (after every zip  archive  entry
       that's  completely  written to disk, and while writing data for entries) with zip archive archive and the
       user-provided user-data ud as arguments.  When the callback function returns a non-zero value, writing is
       cancelled and zip_close(3) returns an error.

       The callback function should be fast, since it will be called often.

zip_register_cancel_callback_with_state() was added in libzip 1.6.0.

       libzip (-lzip)

       zip_register_cancel_callback_with_state — allow cancelling during zip_close

libzip(3), zip_close(3), zip_register_progress_callback_with_state(3)

#include<zip.h>typedefint(*zip_cancel_callback)(zip_t*,void*);voidzip_register_cancel_callback_with_state(zip_t*archive,        zip_cancel_callbackcallback,
           void(*ud_free)(void*), void*ud);