ZIP_FILE_EXTRA_FIELD_SET

Section: Library Functions Manual (3)
Updated: February 20, 2013
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NAME

zip_file_extra_field_set - set extra field for file in zip  

LIBRARY

libzip (-lzip)  

SYNOPSIS

#include <zip.h>

int
zip_file_extra_field_set(struct zip *archivezip_uint64_t indexzip_uint16_t extra_field_idzip_uint16_t extra_field_indexconst zip_uint8_t *extra_field_datazip_uint16_t lenzip_flags_t flags);  

DESCRIPTION

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 archive. 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 comment), 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.  

RETURN VALUES

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

ERRORS

zip_file_extra_field_set() fails if:
[ZIP_ER_INVAL]
The extra field size is too large (ID and length need 4 bytes; the maximum 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.
 

SEE ALSO

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

AUTHORS

Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>


 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
SEE ALSO
AUTHORS