NAME

       zip_file_extra_field_delete,  zip_file_extra_field_delete_by_id  -  delete extra field for
       file in zip

LIBRARY

       libzip (-lzip)

SYNOPSIS

       zip.h int  zip_file_extra_field_delete  zip_t  *archive  zip_uint64_t  index  zip_uint16_t
       extra_field_index  zip_flags_t  flags int zip_file_extra_field_delete_by_id zip_t *archive
       zip_uint64_t index zip_uint16_t extra_field_id zip_uint16_t extra_field_index  zip_flags_t
       flags

DESCRIPTION

       The   zip_file_extra_field_delete   function   deletes   the   extra   field   with  index
       extra_field_index for the file at position index in the zip archive.

       If extra_field_index is ZIP_EXTRA_FIELD_ALL, then all extra fields will be deleted.

       The following flags are supported:

       ZIP_FL_CENTRAL
              Delete extra fields from the archive's central directory.

       ZIP_FL_LOCAL
              Delete extra fields from the local file headers.

       The zip_file_extra_field_delete_by_id function deletes the extra field with  ID  (two-byte
       signature)   extra_field_id   and   index   extra_field_index   (in   other   words,   the
       extra_field_index'th extra field with ID extra_field_id) The other arguments are the  same
       as  for  zip_file_extra_field_delete  (ZIP_EXTRA_FIELD_ALL will delete all extra fields of
       the specified ID).

       Please note that due to the library design, the index of an extra field may  be  different
       between  central  directory and local file headers.  For this reason, it is not allowed to
       specify both ZIP_FL_CENTRAL and ZIP_FL_LOCAL in flags,  except  when  deleting  all  extra
       fields (i.e., extra_field_index being ZIP_EXTRA_FIELD_ALL).

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_delete and zip_file_extra_field_delete_by_id fail if:

       [ZIP_ER_NOENT]   index is not a valid file index in archive.

SEE ALSO

       libzip(3),            zip_file_extra_field_get(3),            zip_file_extra_field_set(3),
       zip_file_extra_fields_count(3)

AUTHORS

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