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zip_file_extra_field_delete.man
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zip_file_extra_field_delete.man
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.\" Automatically generated from an mdoc input file. Do not edit.
.\" 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 <[email protected]>
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\" 3. The names of the authors may not be used to endorse or promote
.\" products derived from this software without specific prior
.\" written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
.\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
.\" IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.TH "ZIP_FILE_EXTRA_FIELD_DELETE" "3" "December 18, 2017" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
\fBzip_file_extra_field_delete\fR,
\fBzip_file_extra_field_delete_by_id\fR
\- delete extra field for file in zip
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
\fB#include <zip.h>\fR
.sp
\fIint\fR
.br
.PD 0
.HP 4n
\fBzip_file_extra_field_delete\fR(\fIzip_t\ *archive\fR, \fIzip_uint64_t\ index\fR, \fIzip_uint16_t\ extra_field_index\fR, \fIzip_flags_t\ flags\fR);
.PD
.PP
\fIint\fR
.br
.PD 0
.HP 4n
\fBzip_file_extra_field_delete_by_id\fR(\fIzip_t\ *archive\fR, \fIzip_uint64_t\ index\fR, \fIzip_uint16_t\ extra_field_id\fR, \fIzip_uint16_t\ extra_field_index\fR, \fIzip_flags_t\ flags\fR);
.PD
.SH "DESCRIPTION"
The
\fBzip_file_extra_field_delete\fR()
function deletes the extra field with index
\fIextra_field_index\fR
for the file at position
\fIindex\fR
in the zip archive.
.PP
If
\fIextra_field_index\fR
is
\fRZIP_EXTRA_FIELD_ALL\fR,
then all extra fields will be deleted.
.PP
The following
\fIflags\fR
are supported:
.RS 6n
.TP 18n
\fRZIP_FL_CENTRAL\fR
Delete extra fields from the archive's central directory.
.TP 18n
\fRZIP_FL_LOCAL\fR
Delete extra fields from the local file headers.
.RE
.PP
The
\fBzip_file_extra_field_delete_by_id\fR()
function deletes the extra field with ID (two-byte signature)
\fIextra_field_id\fR
and index
\fIextra_field_index\fR
(in other words, the
\fIextra_field_index\fR'th
extra field with ID
\fIextra_field_id\fR)
The other arguments are the same as for
\fBzip_file_extra_field_delete\fR()
(\fRZIP_EXTRA_FIELD_ALL\fR
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
\fRZIP_FL_CENTRAL\fR
and
\fRZIP_FL_LOCAL\fR
in
\fIflags\fR,
except when deleting all extra fields (i.e.,
\fIextra_field_index\fR
being
\fRZIP_EXTRA_FIELD_ALL\fR).
.SH "RETURN VALUES"
Upon successful completion 0 is returned.
Otherwise, \-1 is returned and the error code in
\fIarchive\fR
is set to indicate the error.
.SH "ERRORS"
\fBzip_file_extra_field_delete\fR()
and
\fBzip_file_extra_field_delete_by_id\fR()
fail if:
.TP 19n
[\fRZIP_ER_NOENT\fR]
\fIindex\fR
is not a valid file index in
\fIarchive\fR.
.SH "SEE ALSO"
libzip(3),
zip_file_extra_field_get(3),
zip_file_extra_field_set(3),
zip_file_extra_fields_count(3)
.SH "HISTORY"
\fBzip_file_extra_field_delete\fR()
and
\fBzip_file_extra_field_delete_by_id\fR()
were added in libzip 0.11.
.SH "AUTHORS"
Dieter Baron <\[email protected]\fR>
and
Thomas Klausner <\[email protected]\fR>