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zip_file_extra_field_delete.mdoc -- delete extra field for file in zip
Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner
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<title>ZIP_FILE_EXTRA_FIELD_DELETE(3)</title>
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<table class="head">
<tr>
<td class="head-ltitle">ZIP_FILE_EXTRA_FIELD_DELETE(3)</td>
<td class="head-vol">Library Functions Manual</td>
<td class="head-rtitle">ZIP_FILE_EXTRA_FIELD_DELETE(3)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<code class="Nm">zip_file_extra_field_delete</code>,
<code class="Nm">zip_file_extra_field_delete_by_id</code> —
<div class="Nd">delete extra field for file in zip</div>
</section>
<section class="Sh">
<h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
libzip (-lzip)
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<code class="In">#include <<a class="In">zip.h</a>></code>
<p class="Pp"><var class="Ft">int</var>
<br/>
<code class="Fn">zip_file_extra_field_delete</code>(<var class="Fa" style="white-space: nowrap;">zip_t
*archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
index</var>, <var class="Fa" style="white-space: nowrap;">zip_uint16_t
extra_field_index</var>,
<var class="Fa" style="white-space: nowrap;">zip_flags_t flags</var>);</p>
<p class="Pp"><var class="Ft">int</var>
<br/>
<code class="Fn">zip_file_extra_field_delete_by_id</code>(<var class="Fa" style="white-space: nowrap;">zip_t
*archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
index</var>, <var class="Fa" style="white-space: nowrap;">zip_uint16_t
extra_field_id</var>,
<var class="Fa" style="white-space: nowrap;">zip_uint16_t
extra_field_index</var>,
<var class="Fa" style="white-space: nowrap;">zip_flags_t flags</var>);</p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
The <code class="Fn">zip_file_extra_field_delete</code>() function deletes the
extra field with index <var class="Ar">extra_field_index</var> for the file at
position <var class="Ar">index</var> in the zip archive.
<p class="Pp">If <var class="Ar">extra_field_index</var> is
<code class="Dv">ZIP_EXTRA_FIELD_ALL</code>, then all extra fields will be
deleted.</p>
<p class="Pp">The following <var class="Ar">flags</var> are supported:</p>
<div class="Bd-indent">
<dl class="Bl-tag">
<dt><a class="permalink" href="#ZIP_FL_CENTRAL"><code class="Dv" id="ZIP_FL_CENTRAL">ZIP_FL_CENTRAL</code></a></dt>
<dd>Delete extra fields from the archive's central directory.</dd>
<dt><a class="permalink" href="#ZIP_FL_LOCAL"><code class="Dv" id="ZIP_FL_LOCAL">ZIP_FL_LOCAL</code></a></dt>
<dd>Delete extra fields from the local file headers.</dd>
</dl>
</div>
<p class="Pp">The <code class="Fn">zip_file_extra_field_delete_by_id</code>()
function deletes the extra field with ID (two-byte signature)
<var class="Ar">extra_field_id</var> and index
<var class="Ar">extra_field_index</var> (in other words, the
<var class="Ar">extra_field_index</var><span class="No">'th</span> extra
field with ID <var class="Ar">extra_field_id</var>) The other arguments are
the same as for <code class="Fn">zip_file_extra_field_delete</code>()
(<code class="Dv">ZIP_EXTRA_FIELD_ALL</code> will delete all extra fields of
the specified ID).</p>
<p class="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
<code class="Dv">ZIP_FL_CENTRAL</code> and
<code class="Dv">ZIP_FL_LOCAL</code> in <var class="Ar">flags</var>, except
when deleting all extra fields (i.e.,
<var class="Ar">extra_field_index</var> being
<code class="Dv">ZIP_EXTRA_FIELD_ALL</code>).</p>
</section>
<section class="Sh">
<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
VALUES</a></h1>
Upon successful completion 0 is returned. Otherwise, -1 is returned and the
error code in <var class="Ar">archive</var> is set to indicate the error.
</section>
<section class="Sh">
<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
<code class="Fn">zip_file_extra_field_delete</code>() and
<code class="Fn">zip_file_extra_field_delete_by_id</code>() fail if:
<dl class="Bl-tag">
<dt>[<a class="permalink" href="#ZIP_ER_NOENT"><code class="Er" id="ZIP_ER_NOENT">ZIP_ER_NOENT</code></a>]</dt>
<dd><var class="Ar">index</var> is not a valid file index in
<var class="Ar">archive</var>.</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<a class="Xr" href="libzip.html">libzip(3)</a>,
<a class="Xr" href="zip_file_extra_field_get.html">zip_file_extra_field_get(3)</a>,
<a class="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3)</a>,
<a class="Xr" href="zip_file_extra_fields_count.html">zip_file_extra_fields_count(3)</a>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<code class="Fn">zip_file_extra_field_delete</code>() and
<code class="Fn">zip_file_extra_field_delete_by_id</code>() were added in
libzip 0.11.
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<span class="An">Dieter Baron</span>
<<a class="Mt" href="mailto:[email protected]">[email protected]</a>> and
<span class="An">Thomas Klausner</span>
<<a class="Mt" href="mailto:[email protected]">[email protected]</a>>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">December 18, 2017</td>
<td class="foot-os">NiH</td>
</tr>
</table>
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