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<!-- This is an automatically generated file. Do not edit.
zip_file_set_mtime.mdoc -- set mtime for file in zip
Copyright (C) 2014-2022 Dieter Baron and Thomas Klausner
This file is part of libzip, a library to manipulate ZIP files.
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<title>ZIP_FILE_SET_MTIME(3)</title>
</head>
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<table class="head">
<tr>
<td class="head-ltitle">ZIP_FILE_SET_MTIME(3)</td>
<td class="head-vol">Library Functions Manual</td>
<td class="head-rtitle">ZIP_FILE_SET_MTIME(3)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">zip_file_set_dostime</code>,
<code class="Nm">zip_file_set_mtime</code> — <span class="Nd">set
last modification time (mtime) for file in zip</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
<p class="Pp">libzip (-lzip)</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="In">#include
<<a class="In">zip.h</a>></code></p>
<p class="Pp"><var class="Ft">int</var>
<br/>
<code class="Fn">zip_file_set_dostime</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
dostime</var>, <var class="Fa" style="white-space: nowrap;">zip_uint16_t
dosdate</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_set_mtime</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;">time_t
mtime</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>
<p class="Pp">The
<a class="permalink" href="#zip_file_set_mtime"><code class="Fn" id="zip_file_set_mtime">zip_file_set_mtime</code></a>()
function sets the last modification time (mtime) for the file at position
<var class="Ar">index</var> in the zip archive to
<var class="Ar">mtime</var>. Currently, no support for any
<var class="Ar">flags</var> is implemented.</p>
<p class="Pp" id="zip_file_set_dostime">In the zip archive, the time and date
are saved as two 16-bit integers. To set the values directly, call the
<a class="permalink" href="#zip_file_set_dostime"><code class="Fn">zip_file_set_dostime</code></a>()
function. The values of the time bytes are defined as follows:</p>
<div class="Bd-indent">
<dl class="Bl-tag">
<dt>0-4</dt>
<dd>seconds divided by two (1-2 = 1, 3-4 = 2, ...)</dd>
<dt>5-10</dt>
<dd>minute (0-59)</dd>
<dt>11-15</dt>
<dd>hour (0-23)</dd>
</dl>
</div>
<p class="Pp">The values of the date bytes are defined as follows:</p>
<div class="Bd-indent">
<dl class="Bl-tag">
<dt>0-4</dt>
<dd>day of the month (1-31)</dd>
<dt>5-8</dt>
<dd>month (January = 1, February = 2, ...)</dd>
<dt>9-15</dt>
<dd>year offset from 1980 (1980 = 0, 1981 = 1, ...)</dd>
</dl>
</div>
</section>
<section class="Sh">
<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
VALUES</a></h1>
<p class="Pp">Upon successful completion 0 is returned. Otherwise, -1 is
returned and the error information in <var class="Ar">archive</var> is set
to indicate the error.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
<p class="Pp"><code class="Fn">zip_file_set_dostime</code>() and
<code class="Fn">zip_file_set_mtime</code>() fail if:</p>
<dl class="Bl-tag">
<dt id="ZIP_ER_INVAL">[<a class="permalink" href="#ZIP_ER_INVAL"><code class="Er">ZIP_ER_INVAL</code></a>]</dt>
<dd><var class="Ar">index</var> is not a valid file index in
<var class="Ar">archive</var>.</dd>
<dt id="ZIP_ER_MEMORY">[<a class="permalink" href="#ZIP_ER_MEMORY"><code class="Er">ZIP_ER_MEMORY</code></a>]</dt>
<dd>Required memory could not be allocated.</dd>
<dt id="ZIP_ER_OPNOTSUPP">[<a class="permalink" href="#ZIP_ER_OPNOTSUPP"><code class="Er">ZIP_ER_OPNOTSUPP</code></a>]</dt>
<dd>Traditional PKWare encryption uses the file's mtime, therefore it cannot
be changed without re-encrypting the data.</dd>
<dt id="ZIP_ER_RDONLY">[<a class="permalink" href="#ZIP_ER_RDONLY"><code class="Er">ZIP_ER_RDONLY</code></a>]</dt>
<dd>The <var class="Ar">archive</var> was opened in read-only mode.</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<p class="Pp"><a class="Xr" href="libzip.html">libzip(3)</a>,
<a class="Xr" href="zip_stat.html">zip_stat(3)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp"><code class="Fn">zip_file_set_mtime</code>() was added in libzip
1.0. <code class="Fn">zip_file_set_dostime</code>() was added in libzip
1.6.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Dieter Baron</span>
<<a class="Mt" href="mailto:dillo@nih.at">dillo@nih.at</a>> and
<span class="An">Thomas Klausner</span>
<<a class="Mt" href="mailto:wiz@gatalith.at">wiz@gatalith.at</a>></p>
</section>
<section class="Sh">
<h1 class="Sh" id="CAVEATS"><a class="permalink" href="#CAVEATS">CAVEATS</a></h1>
<p class="Pp">Following historical practice, the
<code class="Fn">zip_file_set_mtime</code>() function translates the time
from the zip archive into the local time zone. If you want to avoid this,
use the <code class="Fn">zip_file_set_dostime</code>() function instead.</p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">June 18, 2022</td>
<td class="foot-os">NiH</td>
</tr>
</table>
</body>
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