ZIP_FILE_EXTRA_FIELD_SET(3) - man page online | library functions

Set extra field for file in zip.

February 20, 2013
ZIP_FILE_EXTRA_FIELD_SET(3)          Library Functions Manual         ZIP_FILE_EXTRA_FIELD_SET(3)


zip_file_extra_field_set - set extra field for file in zip


libzip (-lzip)


zip.h int zip_file_extra_field_set zip_t *archive zip_uint64_t index zip_uint16_t extra_field_id zip_uint16_t extra_field_index const zip_uint8_t *extra_field_data zip_uint16_t len zip_flags_t flags


The zip_file_extra_field_set function sets the extra field with ID (two-byte signature) extra_field_id and index extra_field_index for the file at position index in the zip ar‐ chive. The extra field's data will be set to extra_field_data and length len. If a new entry shall be appended, set extra_field_index to ZIP_EXTRA_FIELD_NEW. At least one of the following flags must be set: ZIP_FL_CENTRAL Set extra field in the archive's central directory. ZIP_FL_LOCAL Set extra field in the local file headers. Please note that the extra field IDs 0x0001 (ZIP64 extension), 0x6375 (Infozip UTF-8 com‐ ment), and 0x7075 (Infozip UTF-8 file name) can not be set using zip_file_extra_field_set since they are set by libzip(3) automatically when needed.


Upon successful completion 0 is returned. Otherwise, -1 is returned and the error code in archive is set to indicate the error.


zip_file_extra_field_set fails if: [ZIP_ER_INVAL] The extra field size is too large (ID and length need 4 bytes; the maxi‐ mum length of all extra fields for one file combined is 65536 bytes). This error also occurs if extra_field_index is too large. [ZIP_ER_MEMORY] Required memory could not be allocated. [ZIP_ER_NOENT] index is not a valid file index in archive.


libzip(3), zip_file_extra_field_delete(3), zip_file_extra_field_get(3), zip_file_extra_fields_count(3)


Dieter Baron <> and Thomas Klausner <>
NiH February 20, 2013 ZIP_FILE_EXTRA_FIELD_SET(3)
This manual Reference Other manuals
zip_file_extra_field_set(3) referred by libzip(3) | zip_file_extra_field_delete(3) | zip_file_extra_field_delete_by_id(3) | zip_file_extra_field_get(3) | zip_file_extra_field_get_by_id(3) | zip_file_extra_fields_count(3) | zip_file_extra_fields_count_by_id(3)
refer to libzip(3) | zip_file_extra_field_delete(3) | zip_file_extra_field_get(3) | zip_file_extra_fields_count(3)