| .\" zip_file_extra_field_delete.mdoc -- delete extra field for file in zip |
| .\" Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner |
| .\" |
| .\" This file is part of libzip, a library to manipulate ZIP files. |
| .\" The authors can be contacted at <libzip@nih.at> |
| .\" |
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| .\" 3. The names of the authors may not be used to endorse or promote |
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| .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS |
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| .Dd December 18, 2017 |
| .Dt ZIP_FILE_EXTRA_FIELD_DELETE 3 |
| .Os |
| .Sh NAME |
| .Nm zip_file_extra_field_delete , |
| .Nm zip_file_extra_field_delete_by_id |
| .Nd delete extra field for file in zip |
| .Sh LIBRARY |
| libzip (-lzip) |
| .Sh SYNOPSIS |
| .In zip.h |
| .Ft int |
| .Fn zip_file_extra_field_delete "zip_t *archive" "zip_uint64_t index" "zip_uint16_t extra_field_index" "zip_flags_t flags" |
| .Ft int |
| .Fn 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" |
| .Sh DESCRIPTION |
| The |
| .Fn zip_file_extra_field_delete |
| function deletes the extra field with index |
| .Ar extra_field_index |
| for the file at position |
| .Ar index |
| in the zip archive. |
| .Pp |
| If |
| .Ar extra_field_index |
| is |
| .Dv ZIP_EXTRA_FIELD_ALL , |
| then all extra fields will be deleted. |
| .Pp |
| The following |
| .Ar flags |
| are supported: |
| .Bl -tag -width ZIP_FL_CENTRALXX -offset indent |
| .It Dv ZIP_FL_CENTRAL |
| Delete extra fields from the archive's central directory. |
| .It Dv ZIP_FL_LOCAL |
| Delete extra fields from the local file headers. |
| .El |
| .Pp |
| The |
| .Fn zip_file_extra_field_delete_by_id |
| function deletes the extra field with ID (two-byte signature) |
| .Ar extra_field_id |
| and index |
| .Ar extra_field_index |
| (in other words, the |
| .Ar extra_field_index Ns No 'th |
| extra field with ID |
| .Ar extra_field_id ) |
| The other arguments are the same as for |
| .Fn zip_file_extra_field_delete |
| .Dv ( ZIP_EXTRA_FIELD_ALL |
| will delete all extra fields of the specified ID). |
| .Pp |
| 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 |
| .Dv ZIP_FL_CENTRAL |
| and |
| .Dv ZIP_FL_LOCAL |
| in |
| .Ar flags , |
| except when deleting all extra fields (i.e., |
| .Ar extra_field_index |
| being |
| .Dv ZIP_EXTRA_FIELD_ALL ) . |
| .Sh RETURN VALUES |
| Upon successful completion 0 is returned. |
| Otherwise, \-1 is returned and the error code in |
| .Ar archive |
| is set to indicate the error. |
| .Sh ERRORS |
| .Fn zip_file_extra_field_delete |
| and |
| .Fn zip_file_extra_field_delete_by_id |
| fail if: |
| .Bl -tag -width Er |
| .It Bq Er ZIP_ER_NOENT |
| .Ar index |
| is not a valid file index in |
| .Ar archive . |
| .El |
| .Sh SEE ALSO |
| .Xr libzip 3 , |
| .Xr zip_file_extra_field_get 3 , |
| .Xr zip_file_extra_field_set 3 , |
| .Xr zip_file_extra_fields_count 3 |
| .Sh HISTORY |
| .Fn zip_file_extra_field_delete |
| and |
| .Fn zip_file_extra_field_delete_by_id |
| were added in libzip 0.11. |
| .Sh AUTHORS |
| .An -nosplit |
| .An Dieter Baron Aq Mt dillo@nih.at |
| and |
| .An Thomas Klausner Aq Mt tk@giga.or.at |
