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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 2012 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="systemd-delta">
<refentryinfo>
<title>systemd-delta</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>systemd-delta</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-delta</refname>
<refpurpose>Find overridden configuration files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>systemd-delta</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="opt" rep="repeat"><replaceable>PREFIX</replaceable><optional>/<replaceable>SUFFIX</replaceable></optional>|<replaceable>SUFFIX</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-delta</command> may be used to
identify and compare configuration files that override
other configuration files. Files in
<filename>/etc</filename> have highest priority, files
in <filename>/run</filename> have the second highest
priority, ..., files in <filename>/lib</filename> have
lowest priority. Files in a directory with higher
priority override files with the same name in
directories of lower priority. In addition, certain
configuration files can have <literal>.d</literal>
directories which contain "drop-in" files with
configuration snippets which augment the main
configuration file. "Drop-in" files can be overriden
in the same way by placing files with the same name in
a directory of higher priority (except that in case of
"drop-in" files, both the "drop-in" file name and the
name of the containing directory, which corresponds to
the name of the main configuration file, must match).
For a fuller explanation, see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
</para>
<para>The command line argument will be split into a
prefix and a suffix. Either is optional. The prefix
must be one of the directories containing
configuration files (<filename>/etc</filename>,
<filename>/run</filename>,
<filename>/usr/lib</filename>, ...). If it is given,
only overriding files contained in this directory will
be shown. Otherwise, all overriding files will be
shown. The suffix must be a name of a subdirectory
containing configuration files like
<filename>tmpfiles.d</filename>,
<filename>sysctl.d</filename> or
<filename>systemd/system</filename>. If it is given,
only configuration files in this subdirectory (across
all configuration paths) will be analyzed. Otherwise,
all configuration files will be analyzed. If the
commandline argument is not given at all, all
configuration files will be analyzed. See below for
some examples.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>-h</option></term>
<term><option>--help</option></term>
<listitem><para>Prints a short help
text and exits.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--version</option></term>
<listitem><para>Prints a short version
string and exits.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--no-pager</option></term>
<listitem><para>Do not pipe output into a
pager.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-t</option></term>
<term><option>--type=</option></term>
<listitem><para>When listing the
differences, only list those that are
asked for. The list itself is a
comma-separated list of desired
difference types.</para>
<para>Recognized types are:
<variablelist>
<varlistentry>
<term><varname>masked</varname></term>
<listitem><para>Show masked files</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>equivalent</varname></term>
<listitem><para>Show overridden
files that while overridden, do
not differ in content.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>redirected</varname></term>
<listitem><para>Show files that
are redirected to another.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>overridden</varname></term>
<listitem><para>Show overridden,
and changed files.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>extended</varname></term>
<listitem><para>Show *.conf files in drop-in
directories for units.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>unchanged</varname></term>
<listitem><para>Show unmodified
files too.</para></listitem>
</varlistentry>
</variablelist>
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--diff=</option></term>
<listitem><para>When showing modified
files, when a file is overridden show a
diff as well. This option takes a
boolean argument. If omitted, it defaults
to <option>true</option>.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>To see all local configuration:</para>
<programlisting>systemd-delta</programlisting>
<para>To see all runtime configuration:</para>
<programlisting>systemd-delta /run</programlisting>
<para>To see all system unit configuration changes:</para>
<programlisting>systemd-delta systemd/system</programlisting>
<para>To see all runtime "drop-in" changes for system units:</para>
<programlisting>systemd-delta --type=extended /run/systemd/system</programlisting>
</refsect1>
<refsect1>
<title>Exit status</title>
<para>On success, 0 is returned, a non-zero failure
code otherwise.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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