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zip_open.mdoc -- open zip archive
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<title>ZIP_OPEN(3)</title>
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<body>
<table class="head">
<tr>
<td class="head-ltitle">ZIP_OPEN(3)</td>
<td class="head-vol">Library Functions Manual</td>
<td class="head-rtitle">ZIP_OPEN(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_open</code>,
<code class="Nm">zip_open_from_source</code> — <span class="Nd">open
zip archive</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">zip_t *</var>
<br/>
<code class="Fn">zip_open</code>(<var class="Fa" style="white-space: nowrap;">const
char *path</var>, <var class="Fa" style="white-space: nowrap;">int
flags</var>, <var class="Fa" style="white-space: nowrap;">int
*errorp</var>);</p>
<p class="Pp"><var class="Ft">zip_t *</var>
<br/>
<code class="Fn">zip_open_from_source</code>(<var class="Fa" style="white-space: nowrap;">zip_source_t
*zs</var>, <var class="Fa" style="white-space: nowrap;">int flags</var>,
<var class="Fa" style="white-space: nowrap;">zip_error_t *ze</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_open"><code class="Fn" id="zip_open">zip_open</code></a>()
function opens the zip archive specified by <var class="Ar">path</var> and
returns a pointer to a <var class="Ft">struct zip</var>, used to manipulate
the archive. The <var class="Fa">flags</var> are specified by
<a class="permalink" href="#or"><i class="Em" id="or">or</i></a><span class="No">'ing</span>
the following values, or 0 for none of them.</p>
<div class="Bd-indent">
<dl class="Bl-tag">
<dt id="ZIP_CHECKCONS"><a class="permalink" href="#ZIP_CHECKCONS"><code class="Dv">ZIP_CHECKCONS</code></a></dt>
<dd>Perform additional stricter consistency checks on the archive, and error
if they fail.</dd>
<dt id="ZIP_CREATE"><a class="permalink" href="#ZIP_CREATE"><code class="Dv">ZIP_CREATE</code></a></dt>
<dd>Create the archive if it does not exist.</dd>
<dt id="ZIP_EXCL"><a class="permalink" href="#ZIP_EXCL"><code class="Dv">ZIP_EXCL</code></a></dt>
<dd>Error if archive already exists.</dd>
<dt id="ZIP_TRUNCATE"><a class="permalink" href="#ZIP_TRUNCATE"><code class="Dv">ZIP_TRUNCATE</code></a></dt>
<dd>If archive exists, ignore its current contents. In other words, handle it
the same way as an empty archive.</dd>
<dt id="ZIP_RDONLY"><a class="permalink" href="#ZIP_RDONLY"><code class="Dv">ZIP_RDONLY</code></a></dt>
<dd>Open archive in read-only mode.</dd>
</dl>
</div>
<p class="Pp">If an error occurs and <var class="Ar">errorp</var> is
non-<code class="Dv">NULL</code>, it will be set to the corresponding error
code.</p>
<p class="Pp" id="zip_open_from_source">The
<a class="permalink" href="#zip_open_from_source"><code class="Fn">zip_open_from_source</code></a>()
function opens a zip archive encapsulated by the zip_source
<var class="Fa">zs</var> using the provided <var class="Fa">flags</var>. In
case of error, the zip_error <var class="Fa">ze</var> is filled in.</p>
</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 <code class="Fn">zip_open</code>() and
<code class="Fn">zip_open_from_source</code>() return a
<var class="Ft">struct zip</var> pointer. Otherwise,
<code class="Dv">NULL</code> is returned and
<code class="Fn">zip_open</code>() sets <var class="Ar">*errorp</var> to
indicate the error, while
<code class="Fn">zip_open_from</code>(<var class="Fa">source</var>) sets
<var class="Ar">ze</var> to indicate the error.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="EXAMPLES"><a class="permalink" href="#EXAMPLES">EXAMPLES</a></h1>
<p class="Pp">Here's an example of how you could report errors during
<code class="Nm">zip_open</code>:</p>
<div class="Bd Pp Li">
<pre> zip_t *za;
int err;
if ((za = zip_open(name, 0, &err)) == NULL) {
zip_error_t error;
zip_error_init_with_code(&error, err);
fprintf(stderr, "%s: cannot open zip archive '%s': %s\n",
progname, name, zip_error_strerror(&error));
zip_error_fini(&error);
return -1;
}</pre>
</div>
</section>
<section class="Sh">
<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
<p class="Pp">The archive specified by <var class="Ar">path</var> is opened
unless:</p>
<dl class="Bl-tag">
<dt id="ZIP_ER_EXISTS">[<a class="permalink" href="#ZIP_ER_EXISTS"><code class="Er">ZIP_ER_EXISTS</code></a>]</dt>
<dd>The file specified by <var class="Ar">path</var> exists and
<code class="Dv">ZIP_EXCL</code> is set.</dd>
<dt id="ZIP_ER_INCONS">[<a class="permalink" href="#ZIP_ER_INCONS"><code class="Er">ZIP_ER_INCONS</code></a>]</dt>
<dd>Inconsistencies were found in the file specified by
<var class="Ar">path</var>. This error is often caused by specifying
<code class="Dv">ZIP_CHECKCONS</code> but can also happen without it.</dd>
<dt id="ZIP_ER_INVAL">[<a class="permalink" href="#ZIP_ER_INVAL"><code class="Er">ZIP_ER_INVAL</code></a>]</dt>
<dd>The <var class="Ar">path</var> argument is
<code class="Dv">NULL</code>.</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_NOENT">[<a class="permalink" href="#ZIP_ER_NOENT"><code class="Er">ZIP_ER_NOENT</code></a>]</dt>
<dd>The file specified by <var class="Ar">path</var> does not exist and
<code class="Dv">ZIP_CREATE</code> is not set.</dd>
<dt id="ZIP_ER_NOZIP">[<a class="permalink" href="#ZIP_ER_NOZIP"><code class="Er">ZIP_ER_NOZIP</code></a>]</dt>
<dd>The file specified by <var class="Ar">path</var> is not a zip
archive.</dd>
<dt id="ZIP_ER_OPEN">[<a class="permalink" href="#ZIP_ER_OPEN"><code class="Er">ZIP_ER_OPEN</code></a>]</dt>
<dd>The file specified by <var class="Ar">path</var> could not be opened.</dd>
<dt id="ZIP_ER_READ">[<a class="permalink" href="#ZIP_ER_READ"><code class="Er">ZIP_ER_READ</code></a>]</dt>
<dd>A read error occurred; see <var class="Va">errno</var> for details.</dd>
<dt id="ZIP_ER_SEEK">[<a class="permalink" href="#ZIP_ER_SEEK"><code class="Er">ZIP_ER_SEEK</code></a>]</dt>
<dd>The file specified by <var class="Ar">path</var> does not allow
seeks.</dd>
</dl>
For newly created archives, <code class="Fn">zip_open</code>() does not try to
create the file; this is done when calling
<a class="Xr" href="zip_close.html">zip_close(3)</a> and any errors, like
missing write permissions, will be reported then.
</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_close.html">zip_close(3)</a>,
<a class="Xr" href="zip_error_strerror.html">zip_error_strerror(3)</a>,
<a class="Xr" href="zip_fdopen.html">zip_fdopen(3)</a>,
<a class="Xr" href="zip_source.html">zip_source(5)</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_open</code>() and
<code class="Fn">zip_open_from_source</code>() were added in libzip 1.0.</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>
</div>
<table class="foot">
<tr>
<td class="foot-date">May 5, 2025</td>
<td class="foot-os">NiH</td>
</tr>
</table>
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