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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>eventfd_ctx_fileget</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /><link rel="home" href="index.html" title="Linux Filesystems API" /><link rel="up" href="fs_events.html" title="Chapter 3. Events based on file descriptors" /><link rel="prev" href="API-eventfd-ctx-fdget.html" title="eventfd_ctx_fdget" /><link rel="next" href="sysfs.html" title="Chapter 4. The Filesystem for Exporting Kernel Objects" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>eventfd_ctx_fileget</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-eventfd-ctx-fdget.html">Prev</a> </td><th width="60%" align="center">Chapter 3. Events based on file descriptors</th><td width="20%" align="right"> <a accesskey="n" href="sysfs.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="eventfd_ctx_fileget"><a id="API-eventfd-ctx-fileget"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>eventfd_ctx_fileget —
Acquires a reference to the internal eventfd context.
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">struct eventfd_ctx * <strong>fsfunceventfd_ctx_fileget </strong>(</code></td><td>struct file * <var class="pdparam">file</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2764347"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>file</code></em></span></dt><dd><p>
[in] Eventfd file pointer.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2764374"></a><h2>Description</h2><p>
Returns a pointer to the internal eventfd context, otherwise the error
</p></div><div class="refsect1" title="pointer"><a id="id2764385"></a><h2>pointer</h2><p>
</p><p>
-EINVAL : The <em class="parameter"><code>fd</code></em> file descriptor is not an eventfd file.
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