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+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!--
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+<refentry id="binfmt.d">
+
+ <refentryinfo>
+ <title>binfmt.d</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>binfmt.d</refentrytitle>
+ <manvolnum>5</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>binfmt.d</refname>
+ <refpurpose>Configure additional binary formats for
+ executables at boot</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>/etc/binfmt.d/*.conf</filename></para>
+ <para><filename>/run/binfmt.d/*.conf</filename></para>
+ <para><filename>/usr/lib/binfmt.d/*.conf</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>At boot,
+ <citerefentry><refentrytitle>systemd-binfmt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ reads configuration files from the above directories
+ to register in the kernel additional binary
+ formats for executables.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Configuration Format</title>
+
+ <para>Each file contains a list of binfmt_misc kernel
+ binary format rules. Consult <ulink
+ url="http://www.kernel.org/doc/Documentation/binfmt_misc.txt">binfmt_misc.txt</ulink>
+ for more information on registration of additional
+ binary formats and how to write rules.</para>
+
+ <para>Empty lines and lines beginning with ; and # are
+ ignored. Note that this means you may not use ; and #
+ as delimiter in binary format rules.</para>
+
+ <para>Each configuration file shall be named in the
+ style of <filename>&lt;program&gt;.conf</filename>.
+ Files in <filename>/etc/</filename> override files
+ with the same name in <filename>/usr/lib/</filename>
+ and <filename>/run/</filename>. Files in
+ <filename>/run/</filename> override files with the
+ same name in <filename>/usr/lib/</filename>. Packages
+ should install their configuration files in
+ <filename>/usr/lib/</filename>, files in
+ <filename>/etc/</filename> are reserved for the local
+ administrator, who may use this logic to override the
+ configuration files installed from vendor
+ packages. All files are sorted by their filename in
+ alphabetical order, regardless in which of the
+ directories they reside, to guarantee that a specific
+ configuration file takes precedence over another file
+ with an alphabetically later name.</para>
+
+ <para>If the administrator wants to disable a
+ configuration file supplied by the vendor the
+ recommended way is to place a symlink to
+ <filename>/dev/null</filename> in
+ <filename>/etc/binfmt.d/</filename> bearing the
+ same file name.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Example</title>
+ <example>
+ <title>/etc/binfmt.d/wine.conf example:</title>
+
+ <programlisting># Start WINE on Windows executables
+:DOSWin:M::MZ::/usr/bin/wine:</programlisting>
+ </example>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-binfmt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>wine</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>