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184d190473
In the future we might want to allow additional syntax (for example "unset VAR". But let's check that the data we're getting does not contain anything unexpected.
115 lines
4.2 KiB
XML
115 lines
4.2 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2016 Red Hat, Inc.
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Copyright 2017 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="environment.d" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>environment.d</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Ray</firstname>
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<surname>Strode</surname>
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<email>rstrode@redhat.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>environment.d</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>environment.d</refname>
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<refpurpose>Definition of user session environment</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>~/.config/environment.d/*.conf</filename></para>
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<para><filename>/etc/environment.d/*.conf</filename></para>
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<para><filename>/run/environment.d/*.conf</filename></para>
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<para><filename>/usr/lib/environment.d/*.conf</filename></para>
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<para><filename>/etc/environment</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>The <filename>environment.d</filename> directories contain a list of "global" environment
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variable assignments for the user environment.
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<citerefentry><refentrytitle>systemd-environment-d-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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parses them and updates the environment exported by the systemd user instance to the services it
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starts.</para>
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<para>It is recommended to use numerical prefixes for file names to simplify ordering.</para>
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<para>For backwards compatibility, a symlink to <filename>/etc/environment</filename> is
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installed, so this file is also parsed.</para>
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</refsect1>
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<xi:include href="standard-conf.xml" xpointer="confd" />
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<refsect1>
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<title>Configuration Format</title>
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<para>The configuration files contain a list of
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<literal><replaceable>KEY</replaceable>=<replaceable>VALUE</replaceable></literal> environment
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variable assignments, separated by newlines. The right hand side of these assignments may
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reference previously defined environment variables, using the <literal>${OTHER_KEY}</literal>
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and <literal>$OTHER_KEY</literal> format. No other elements of shell syntax are supported.
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</para>
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<para>Each<replaceable>KEY</replaceable> must be a valid variable name. Empty lines
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and lines beginning with the comment character <literal>#</literal> are ignored.</para>
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<refsect2>
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<title>Example</title>
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<example>
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<title>Setup environment to allow access to a program installed in
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<filename noindex='true'>/opt/foo</filename></title>
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<para><filename>/etc/environment.d/60-foo.conf</filename>:
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</para>
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<programlisting>
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FOO_DEBUG=force-software-gl,log-verbose
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PATH=/opt/foo/bin:$PATH
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LD_LIBRARY_PATH=/opt/foo/lib
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XDG_DATA_DIRS=/opt/foo/share:${XDG_DATA_DIRS}
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</programlisting>
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</example>
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</refsect2>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-environment-d-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.environment-generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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