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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_exec</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#id2663273" title="Module Loading" /><link rel="prev" href="re297.html" title="call_usermodehelper_setfns" /><link rel="next" href="ch08s02.html" title="Inter Module support" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>call_usermodehelper_exec</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re297.html">Prev</a> </td><th width="60%" align="center">Module Loading</th><td width="20%" align="right"> <a accesskey="n" href="ch08s02.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="call_usermodehelper_exec"><a id="API-call-usermodehelper-exec"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>call_usermodehelper_exec —
start a usermode application
</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">int <b class="fsfunc">call_usermodehelper_exec </b>(</code></td><td>struct subprocess_info * <var class="pdparam">sub_info</var>, </td></tr><tr><td> </td><td>enum umh_wait <var class="pdparam">wait</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2664086"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>sub_info</code></em></span></dt><dd><p>
information about the subprocessa
</p></dd><dt><span class="term"><em class="parameter"><code>wait</code></em></span></dt><dd><p>
wait for the application to finish and return status.
when -1 don't wait at all, but you get no useful error back when
the program couldn't be exec'ed. This makes it safe to call
from interrupt context.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2664133"></a><h2>Description</h2><p>
Runs a user-space application. The application is started
asynchronously if wait is not set, and runs as a child of keventd.
(ie. it runs with full root capabilities).
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