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 <div class="refentry" title="udev">
 <a name="libudev-udev"></a><div class="titlepage"></div>
 <div class="refnamediv"><table width="100%"><tr>
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 <h2><span class="refentrytitle"><a name="libudev-udev.top_of_page"></a>udev</span></h2>
 <p>udev — libudev context</p>
 </td>
 <td valign="top" align="right"></td>
 </tr></table></div>
 <div class="refsynopsisdiv" title="Synopsis">
 <a name="libudev-udev.synopsis"></a><h2>Synopsis</h2>
 <pre class="synopsis">struct              <a class="link" href="libudev-udev.html#udev" title="struct udev">udev</a>;
 struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> *       <a class="link" href="libudev-udev.html#udev-ref" title="udev_ref ()">udev_ref</a>                            (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 <span class="returnvalue">void</span>                <a class="link" href="libudev-udev.html#udev-unref" title="udev_unref ()">udev_unref</a>                          (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> *       <a class="link" href="libudev-udev.html#udev-new" title="udev_new ()">udev_new</a>                            (<em class="parameter"><code><span class="type">void</span></code></em>);
 <span class="returnvalue">void</span>                <a class="link" href="libudev-udev.html#udev-set-log-fn" title="udev_set_log_fn ()">udev_set_log_fn</a>                     (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">void</span> (log_fnstruct udev *udev, int priority, const char *file, int line, const char *fn, const char *format, va_list args) ()</code></em>);
 <span class="returnvalue">int</span>                 <a class="link" href="libudev-udev.html#udev-get-log-priority" title="udev_get_log_priority ()">udev_get_log_priority</a>               (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 <span class="returnvalue">void</span>                <a class="link" href="libudev-udev.html#udev-set-log-priority" title="udev_set_log_priority ()">udev_set_log_priority</a>               (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">int</span> priority</code></em>);
 const <span class="returnvalue">char</span> *        <a class="link" href="libudev-udev.html#udev-get-sys-path" title="udev_get_sys_path ()">udev_get_sys_path</a>                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 const <span class="returnvalue">char</span> *        <a class="link" href="libudev-udev.html#udev-get-dev-path" title="udev_get_dev_path ()">udev_get_dev_path</a>                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 <span class="returnvalue">void</span> *              <a class="link" href="libudev-udev.html#udev-get-userdata" title="udev_get_userdata ()">udev_get_userdata</a>                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
 <span class="returnvalue">void</span>                <a class="link" href="libudev-udev.html#udev-set-userdata" title="udev_set_userdata ()">udev_set_userdata</a>                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">void</span> *userdata</code></em>);
 </pre>
 </div>
 <div class="refsect1" title="Description">
 <a name="libudev-udev.description"></a><h2>Description</h2>
 <p>
 The context contains the default values read from the udev config file,
 and is passed to all library operations.
 </p>
 </div>
 <div class="refsect1" title="Details">
 <a name="libudev-udev.details"></a><h2>Details</h2>
 <div class="refsect2" title="struct udev">
 <a name="udev"></a><h3>struct udev</h3>
 <pre class="programlisting">struct udev;</pre>
 <p>
 Opaque object representing the library context.
 </p>
 </div>
 <hr>
 <div class="refsect2" title="udev_ref ()">
 <a name="udev-ref"></a><h3>udev_ref ()</h3>
 <pre class="programlisting">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> *       udev_ref                            (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 Take a reference of the udev library context.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> the passed udev library context
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_unref ()">
 <a name="udev-unref"></a><h3>udev_unref ()</h3>
 <pre class="programlisting"><span class="returnvalue">void</span>                udev_unref                          (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 Drop a reference of the udev library context. If the refcount
 reaches zero, the resources of the context will be released.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody><tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr></tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_new ()">
 <a name="udev-new"></a><h3>udev_new ()</h3>
 <pre class="programlisting">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> *       udev_new                            (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
 <p>
 Create udev library context. This reads the udev configuration
 file, and fills in the default values.
 </p>
 <p>
 The initial refcount is 1, and needs to be decremented to
 release the resources of the udev library context.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody><tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> a new udev library context
 </td>
 </tr></tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_set_log_fn ()">
 <a name="udev-set-log-fn"></a><h3>udev_set_log_fn ()</h3>
 <pre class="programlisting"><span class="returnvalue">void</span>                udev_set_log_fn                     (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">void</span> (log_fnstruct udev *udev, int priority, const char *file, int line, const char *fn, const char *format, va_list args) ()</code></em>);</pre>
 <p>
 The built-in logging writes to stderr. It can be
 overridden by a custom function, to plug log messages
 into the users' logging functionality.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody><tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr></tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_get_log_priority ()">
 <a name="udev-get-log-priority"></a><h3>udev_get_log_priority ()</h3>
 <pre class="programlisting"><span class="returnvalue">int</span>                 udev_get_log_priority               (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 The initial logging priority is read from the udev config file
 at startup.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> the current logging priority
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_set_log_priority ()">
 <a name="udev-set-log-priority"></a><h3>udev_set_log_priority ()</h3>
 <pre class="programlisting"><span class="returnvalue">void</span>                udev_set_log_priority               (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">int</span> priority</code></em>);</pre>
 <p>
 Set the current logging priority. The value controls which messages
 are logged.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>priority</code></em> :</span></p></td>
 <td>the new logging priority
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_get_sys_path ()">
 <a name="udev-get-sys-path"></a><h3>udev_get_sys_path ()</h3>
 <pre class="programlisting">const <span class="returnvalue">char</span> *        udev_get_sys_path                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 Retrieve the sysfs mount point. The default is "/sys". For
 testing purposes, it can be overridden with the environment
 variable SYSFS_PATH.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> the sys mount point
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_get_dev_path ()">
 <a name="udev-get-dev-path"></a><h3>udev_get_dev_path ()</h3>
 <pre class="programlisting">const <span class="returnvalue">char</span> *        udev_get_dev_path                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 Retrieve the device directory path. The default value is "/dev",
 the actual value may be overridden in the udev configuration
 file.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> the device directory path
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_get_userdata ()">
 <a name="udev-get-userdata"></a><h3>udev_get_userdata ()</h3>
 <pre class="programlisting"><span class="returnvalue">void</span> *              udev_get_userdata                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
 <p>
 Retrieve stored data pointer from library context. This might be useful
 to access from callbacks like a custom logging function.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 <td> stored userdata
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 <hr>
 <div class="refsect2" title="udev_set_userdata ()">
 <a name="udev-set-userdata"></a><h3>udev_set_userdata ()</h3>
 <pre class="programlisting"><span class="returnvalue">void</span>                udev_set_userdata                   (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
                                                          <em class="parameter"><code><span class="type">void</span> *userdata</code></em>);</pre>
 <p>
 Store custom <em class="parameter"><code>userdata</code></em> in the library context.
 </p>
 <div class="variablelist"><table border="0">
 <col align="left" valign="top">
 <tbody>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
 <td>udev library context
 </td>
 </tr>
 <tr>
 <td><p><span class="term"><em class="parameter"><code>userdata</code></em> :</span></p></td>
 <td>data pointer
 </td>
 </tr>
 </tbody>
 </table></div>
 </div>
 </div>
 </div>
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	<h2><span class="refentrytitle"><a name="libudev-udev.top_of_page"></a>udev</span></h2>
	<p>udev — libudev context</p>
	</td>
	<td valign="top" align="right"></td>
	</tr></table></div>
	<div class="refsynopsisdiv" title="Synopsis">
	<a name="libudev-udev.synopsis"></a><h2>Synopsis</h2>
	<pre class="synopsis">struct <a class="link" href="libudev-udev.html#udev" title="struct udev">udev</a>;
	struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * <a class="link" href="libudev-udev.html#udev-ref" title="udev_ref ()">udev_ref</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	<span class="returnvalue">void</span> <a class="link" href="libudev-udev.html#udev-unref" title="udev_unref ()">udev_unref</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * <a class="link" href="libudev-udev.html#udev-new" title="udev_new ()">udev_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
	<span class="returnvalue">void</span> <a class="link" href="libudev-udev.html#udev-set-log-fn" title="udev_set_log_fn ()">udev_set_log_fn</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">void</span> (log_fnstruct udev udev, int priority, const char file, int line, const char fn, const char format, va_list args) ()</code></em>);
	<span class="returnvalue">int</span> <a class="link" href="libudev-udev.html#udev-get-log-priority" title="udev_get_log_priority ()">udev_get_log_priority</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	<span class="returnvalue">void</span> <a class="link" href="libudev-udev.html#udev-set-log-priority" title="udev_set_log_priority ()">udev_set_log_priority</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">int</span> priority</code></em>);
	const <span class="returnvalue">char</span> * <a class="link" href="libudev-udev.html#udev-get-sys-path" title="udev_get_sys_path ()">udev_get_sys_path</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	const <span class="returnvalue">char</span> * <a class="link" href="libudev-udev.html#udev-get-dev-path" title="udev_get_dev_path ()">udev_get_dev_path</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	<span class="returnvalue">void</span> * <a class="link" href="libudev-udev.html#udev-get-userdata" title="udev_get_userdata ()">udev_get_userdata</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);
	<span class="returnvalue">void</span> <a class="link" href="libudev-udev.html#udev-set-userdata" title="udev_set_userdata ()">udev_set_userdata</a> (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">void</span> *userdata</code></em>);
	</pre>
	</div>
	<div class="refsect1" title="Description">
	<a name="libudev-udev.description"></a><h2>Description</h2>
	<p>
	The context contains the default values read from the udev config file,
	and is passed to all library operations.
	</p>
	</div>
	<div class="refsect1" title="Details">
	<a name="libudev-udev.details"></a><h2>Details</h2>
	<div class="refsect2" title="struct udev">
	<a name="udev"></a><h3>struct udev</h3>
	<pre class="programlisting">struct udev;</pre>
	<p>
	Opaque object representing the library context.
	</p>
	</div>
	<hr>
	<div class="refsect2" title="udev_ref ()">
	<a name="udev-ref"></a><h3>udev_ref ()</h3>
	<pre class="programlisting">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * udev_ref (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	Take a reference of the udev library context.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> the passed udev library context
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_unref ()">
	<a name="udev-unref"></a><h3>udev_unref ()</h3>
	<pre class="programlisting"><span class="returnvalue">void</span> udev_unref (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	Drop a reference of the udev library context. If the refcount
	reaches zero, the resources of the context will be released.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody><tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr></tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_new ()">
	<a name="udev-new"></a><h3>udev_new ()</h3>
	<pre class="programlisting">struct <a class="link" href="libudev-udev.html#udev" title="struct udev"><span class="returnvalue">udev</span></a> * udev_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
	<p>
	Create udev library context. This reads the udev configuration
	file, and fills in the default values.
	</p>
	<p>
	The initial refcount is 1, and needs to be decremented to
	release the resources of the udev library context.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody><tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> a new udev library context
	</td>
	</tr></tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_set_log_fn ()">
	<a name="udev-set-log-fn"></a><h3>udev_set_log_fn ()</h3>
	<pre class="programlisting"><span class="returnvalue">void</span> udev_set_log_fn (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">void</span> (log_fnstruct udev udev, int priority, const char file, int line, const char fn, const char format, va_list args) ()</code></em>);</pre>
	<p>
	The built-in logging writes to stderr. It can be
	overridden by a custom function, to plug log messages
	into the users' logging functionality.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody><tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr></tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_get_log_priority ()">
	<a name="udev-get-log-priority"></a><h3>udev_get_log_priority ()</h3>
	<pre class="programlisting"><span class="returnvalue">int</span> udev_get_log_priority (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	The initial logging priority is read from the udev config file
	at startup.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> the current logging priority
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_set_log_priority ()">
	<a name="udev-set-log-priority"></a><h3>udev_set_log_priority ()</h3>
	<pre class="programlisting"><span class="returnvalue">void</span> udev_set_log_priority (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">int</span> priority</code></em>);</pre>
	<p>
	Set the current logging priority. The value controls which messages
	are logged.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>priority</code></em> :</span></p></td>
	<td>the new logging priority
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_get_sys_path ()">
	<a name="udev-get-sys-path"></a><h3>udev_get_sys_path ()</h3>
	<pre class="programlisting">const <span class="returnvalue">char</span> * udev_get_sys_path (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	Retrieve the sysfs mount point. The default is "/sys". For
	testing purposes, it can be overridden with the environment
	variable SYSFS_PATH.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> the sys mount point
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_get_dev_path ()">
	<a name="udev-get-dev-path"></a><h3>udev_get_dev_path ()</h3>
	<pre class="programlisting">const <span class="returnvalue">char</span> * udev_get_dev_path (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	Retrieve the device directory path. The default value is "/dev",
	the actual value may be overridden in the udev configuration
	file.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> the device directory path
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_get_userdata ()">
	<a name="udev-get-userdata"></a><h3>udev_get_userdata ()</h3>
	<pre class="programlisting"><span class="returnvalue">void</span> * udev_get_userdata (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>);</pre>
	<p>
	Retrieve stored data pointer from library context. This might be useful
	to access from callbacks like a custom logging function.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
	<td> stored userdata
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	<hr>
	<div class="refsect2" title="udev_set_userdata ()">
	<a name="udev-set-userdata"></a><h3>udev_set_userdata ()</h3>
	<pre class="programlisting"><span class="returnvalue">void</span> udev_set_userdata (<em class="parameter"><code><span class="type">struct udev</span> *udev</code></em>,
	<em class="parameter"><code><span class="type">void</span> *userdata</code></em>);</pre>
	<p>
	Store custom <em class="parameter"><code>userdata</code></em> in the library context.
	</p>
	<div class="variablelist"><table border="0">
	<col align="left" valign="top">
	<tbody>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>udev</code></em> :</span></p></td>
	<td>udev library context
	</td>
	</tr>
	<tr>
	<td><p><span class="term"><em class="parameter"><code>userdata</code></em> :</span></p></td>
	<td>data pointer
	</td>
	</tr>
	</tbody>
	</table></div>
	</div>
	</div>
	</div>
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