<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML ><HEAD ><TITLE >call_usermodehelper</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="The Linux Kernel API" HREF="book1.html"><LINK REL="UP" TITLE="Module Loading" HREF="c7737.html#AEN7739"><LINK REL="PREVIOUS" TITLE="request_module" HREF="r7741.html"><LINK REL="NEXT" TITLE="Inter Module support" HREF="x7809.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The Linux Kernel API</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="r7741.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x7809.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="AEN7768" ></A ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >call_usermodehelper</SPAN ></SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN7772" ></A ><H2 >Name</H2 >call_usermodehelper -- start a usermode application </DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN7775" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN7777" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >int <TT CLASS="FUNCTION" >call_usermodehelper </TT ></CODE >(char * <TT CLASS="PARAMETER" ><I >path</I ></TT >, char ** <TT CLASS="PARAMETER" ><I >argv</I ></TT >, char ** <TT CLASS="PARAMETER" ><I >envp</I ></TT >);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN7787" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" ><I >path</I ></TT ></DT ><DD ><P > pathname for the application </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >argv</I ></TT ></DT ><DD ><P > null-terminated argument list </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >envp</I ></TT ></DT ><DD ><P > null-terminated environment list </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN7805" ></A ><H2 >Description</H2 ><P > Runs a user-space application. The application is started asynchronously. It runs as a child of keventd. It runs with full root capabilities. keventd silently reaps the child when it exits. </P ><P > Must be called from process context. Returns zero on success, else a negative error code. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="r7741.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="x7809.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >request_module</SPAN ></SPAN ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c7737.html#AEN7739" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Inter Module support</TD ></TR ></TABLE ></DIV ></BODY ></HTML >