zip_file_set_mtime man page
zip_file_set_mtime — set last modification time (mtime) for file in zip
zip_file_set_mtime(zip_t *archive, zip_uint64_t index, time_t mtime, zip_flags_t flags);
The zip_file_set_mtime() function sets the last modification time (mtime) for the file at position index in the zip archive to mtime. Currently, no support for any flags is implemented.
Upon successful completion 0 is returned. Otherwise, -1 is returned and the error information in archive is set to indicate the error.
zip_file_set_mtime() fails if:
index is not a valid file index in archive.
Required memory could not be allocated.
The archive was opened in read-only mode.
Dieter Baron <firstname.lastname@example.org> and Thomas Klausner <email@example.com>