<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [  <!ENTITY debian  "<productname>Debian GNU/Linux</productname>">  <!ENTITY docbook "<productname>DocBook</productname>">  <!ENTITY sgml    "<abbrev>SGML</abbrev>">]><!-- Stolen from manual page for docbook-to-man, DocBook source file     (C) 1999 W. Borgert debacle@debian.org     $Id: docbook-to-man.sgml,v 1.8 2002/04/27 15:28:02 debacle Exp $ --><refentry>  <refentryinfo>    <address>      <email>rusty@rustcorp.com.au</email>    </address>    <author>      <firstname>Rusty</firstname>      <surname>Russell</surname>    </author>    <date>2002-12-27</date>  </refentryinfo>  <refmeta>    <refentrytitle>depmod</refentrytitle>    <manvolnum>8</manvolnum>  </refmeta>  <refnamediv>    <refname>depmod</refname> <refpurpose>program to generate <filename>modules.dep</filename> and map files.</refpurpose>  </refnamediv>  <refsynopsisdiv>    <cmdsynopsis>      <command>depmod</command>      <arg><option>-b <replaceable>basedir</replaceable></option></arg>      <arg><option>-e</option></arg>      <arg><option>-F <replaceable>System.map</replaceable></option></arg>      <arg><option>-n</option></arg>      <arg><option>-v</option></arg>      <arg><option><replaceable>version</replaceable></option></arg>      <arg><option>-A</option>    </cmdsynopsis>    <cmdsynopsis>      <command>depmod</command>      <arg><option>-e</option></arg>      <arg><option>-F<replaceable>System.map</replaceable></option></arg>      <arg><option>-n</option></arg>      <arg><option>-v</option></arg>      <arg><option><replaceable>version</replaceable></option></arg>      <arg rep='repeat'><option><replaceable>filename</replaceable></option></arg>    </cmdsynopsis>  </refsynopsisdiv>  <refsect1>    <title>DESCRIPTION</title>    <para>      Linux kernel modules can provide services (called "symbols") for      other modules to use (using EXPORT_SYMBOL in the code).  If a      second module uses this symbol, that second module clearly      depends on the first module.  These dependencies can get quite      complex.    </para>    <para>      <command>depmod</command> creates a list of module dependencies,      by reading each module under      <filename>/lib/modules/</filename><replaceable>version</replaceable>       and determining what symbols it exports, and what symbols it      needs.  By default this list is written to      <filename>modules.dep</filename> in the same directory.  If      filenames are given on the command line, only those modules are      examined (which is rarely useful, unless all modules are      listed).    </para>    <para>      If a <replaceable>version</replaceable> is provided, then that      kernel version's module directory is used, rather than the      current kernel version (as returned by "uname -r").    </para>    <para>      <command>depmod</command> will also generate various map files      in this directory, for use by the hotplug infrastructure.    </para>  </refsect1>  <refsect1>    <title>OPTIONS</title>    <variablelist>      <varlistentry>	  <term><option>-b <replaceable>basedir</replaceable></option> <option>--basedir <replaceable>basedir</replaceable></option>	  </term>	  <listitem>	    <para>	      If your modules are not currently in the (normal)	      directory	      <filename>/lib/modules/</filename><replaceable>version</replaceable>,	      but in a staging area, you can specify a	      <replaceable>basedir</replaceable> which is prepended to	      the directory name.  This	      <replaceable>basedir</replaceable> is stripped from the	      resulting <filename>modules.dep</filename> file, so it	      is ready to be moved into the normal location.	    </para>        </listitem>      </varlistentry>      <varlistentry>        <term><option>-e</option> <option>--errsyms</option>        </term>	  <listitem>	    <para>	      When combined with the <option>-F</option> option, this	      reports any symbols which a module needs which are not	      supplied by other modules or the kernel.  Normally, any	      symbols not provided by modules are assumed to be	      provided by the kernel (which should be true in a	      perfect world).	    </para>	  </listitem>      </varlistentry>      <varlistentry>        <term><option>-F</option> <option>--filesyms <replaceable>System.map</replaceable></option>        </term>        <listitem>          <para>	    Supplied with the <filename>System.map</filename> produced	    when the kernel was built, this allows the	    <option>-e</option> option to report unresolved symbols.	  </para>        </listitem>      </varlistentry>      <varlistentry>        <term><option>-n</option> <option>--dry-run</option>        </term>        <listitem>          <para>	    This sends the resulting modules.dep, then the various	    map files, to standard output, rather than writing them into	    the module directory.	  </para>        </listitem>      </varlistentry>      <varlistentry>        <term><option>-A</option> <option>--quick</option>        </term>        <listitem>          <para>	    This option scans to see if any modules are newer the	    <filename>modules.dep</filename> file before any work is	    done: if not, it silently exits rather than regenerating	    the files.	  </para>        </listitem>      </varlistentry>    </variablelist>  </refsect1>  <refsect1>    <title>BACKWARDS COMPATIBILITY</title>    <para>      This version of <command>depmod</command> is for kernels      <literal>2.5.48</literal> and above.  If it detects a kernel      with support for old-style modules, or the version specified is      before <literal>2.5.48</literal>, it will attempt to run      <command>depmod.old</command> in its place, so it is completely      transparent to the user.    </para>  </refsect1>  <refsect1>    <title>COPYRIGHT</title>    <para>      This manual page Copyright 2002, Rusty Russell, IBM Corporation.    </para>  </refsect1>  <refsect1>    <title>SEE ALSO</title>    <para>      <citerefentry>	<refentrytitle>modprobe</refentrytitle><manvolnum>8</manvolnum>      </citerefentry>,      <citerefentry>	<refentrytitle>modules.dep</refentrytitle><manvolnum>5</manvolnum>      </citerefentry>,      <citerefentry>	<refentrytitle>depmod.old</refentrytitle><manvolnum>8</manvolnum>      </citerefentry>    </para>  </refsect1></refentry><!-- Keep this comment at the end of the fileLocal variables:mode: sgmlsgml-omittag:tsgml-shorttag:tsgml-minimize-attributes:nilsgml-always-quote-attributes:tsgml-indent-step:2sgml-indent-data:tsgml-parent-document:nilsgml-default-dtd-file:nilsgml-exposed-tags:nilsgml-local-catalogs:nilsgml-local-ecat-files:nilEnd:-->