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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>udev_monitor_new_from_netlink</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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<span style="float:right">systemd 221</span><hr><div class="refentry"><a name="udev_monitor_new_from_netlink"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>udev_monitor_new_from_netlink, udev_monitor_ref, udev_monitor_unref — Create, acquire and release a udev monitor object</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <libudev.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct udev_monitor *<b class="fsfunc">udev_monitor_new_from_netlink</b>(</code></td><td>struct udev *<var class="pdparam">udev</var>, </td></tr><tr><td> </td><td>const char *<var class="pdparam">name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct udev_monitor *<b class="fsfunc">udev_monitor_ref</b>(</code></td><td>struct udev_monitor *<var class="pdparam">udev_monitor</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct udev_monitor *<b class="fsfunc">udev_monitor_unref</b>(</code></td><td>struct udev_monitor *<var class="pdparam">udev_monitor</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm47337545715488"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>On success,
<code class="function">udev_monitor_new_from_netlink()</code> returns a
pointer to the allocated udev monitor. On failure,
<code class="constant">NULL</code> is returned.
<code class="function">udev_monitor_ref()</code> returns the argument
that it was passed, unmodified.
<code class="function">udev_monitor_unref()</code> always returns
<code class="constant">NULL</code>.</p></div><div class="refsect1"><a name="idm47337545711808"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="udev_new.html"><span class="citerefentry"><span class="refentrytitle">udev_new</span>(3)</span></a>,
<a href="udev_device_new_from_syspath.html"><span class="citerefentry"><span class="refentrytitle">udev_device_new_from_syspath</span>(3)</span></a>,
<a href="udev_enumerate_new.html"><span class="citerefentry"><span class="refentrytitle">udev_enumerate_new</span>(3)</span></a>,
<a href="udev_monitor_filter_update.html"><span class="citerefentry"><span class="refentrytitle">udev_monitor_filter_update</span>(3)</span></a>,
<a href="udev_monitor_receive_device.html"><span class="citerefentry"><span class="refentrytitle">udev_monitor_receive_device</span>(3)</span></a>,
<a href="udev_list_entry.html"><span class="citerefentry"><span class="refentrytitle">udev_list_entry</span>(3)</span></a>,
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
</p></div></div></body></html>
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