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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>call_usermodehelper_setfns</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux Kernel API" /><link rel="up" href="ch08.html#id2995747" title="Module Loading" /><link rel="prev" href="re298.html" title="call_usermodehelper_setkeys" /><link rel="next" href="re300.html" title="call_usermodehelper_exec" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>call_usermodehelper_setfns</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re298.html">Prev</a> </td><th width="60%" align="center">Module Loading</th><td width="20%" align="right"> <a accesskey="n" href="re300.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="call_usermodehelper_setfns"><a id="API-call-usermodehelper-setfns"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>call_usermodehelper_setfns —
set a cleanup/init function
</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">void <b class="fsfunc">call_usermodehelper_setfns </b>(</code></td><td>struct subprocess_info * <var class="pdparam">info</var>, </td></tr><tr><td> </td><td>int (*<var class="pdparam">init</var>)
<code>(</code>struct subprocess_info *info<code>)</code>, </td></tr><tr><td> </td><td>void (*<var class="pdparam">cleanup</var>)
<code>(</code>struct subprocess_info *info<code>)</code>, </td></tr><tr><td> </td><td>void * <var class="pdparam">data</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2996373"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>info</code></em></span></dt><dd><p>
a subprocess_info returned by call_usermodehelper_setup
</p></dd><dt><span class="term"><em class="parameter"><code>init</code></em></span></dt><dd><p>
an init function
</p></dd><dt><span class="term"><em class="parameter"><code>cleanup</code></em></span></dt><dd><p>
a cleanup function
</p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
arbitrary context sensitive data
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2996452"></a><h2>Description</h2><p>
The init function is used to customize the helper process prior to
exec. A non-zero return code causes the process to error out, exit,
and return the failure to the calling process
</p><p>
The cleanup function is just before ethe subprocess_info is about to
be freed. This can be used for freeing the argv and envp. The
Function must be runnable in either a process context or the
context in which call_usermodehelper_exec is called.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re298.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch08.html#id2995747">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re300.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>call_usermodehelper_setkeys</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>call_usermodehelper_exec</span></td></tr></table></div></body></html>
