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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 2010 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-logind.service" conditional='HAVE_PAM'>
<refentryinfo>
<title>systemd-logind.service</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-logind.service</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-logind.service</refname>
<refname>systemd-logind</refname>
<refpurpose>Login manager</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd-logind.service</filename></para>
<para><filename>/usr/lib/systemd/systemd-logind</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>systemd-logind</filename> is a system
service that manages user logins. It is responsible
for:</para>
<itemizedlist>
<listitem><para>Keeping track of users and sessions, their
processes and their idle state</para></listitem>
<listitem><para>Creating control groups for
user processes</para></listitem>
<listitem><para>Providing PolicyKit-based access
for users to operations such as system
shutdown or sleep</para></listitem>
<listitem><para>Implementing a shutdown/sleep
inhibition logic for
applications</para></listitem>
<listitem><para>Handling of power/sleep
hardware keys</para></listitem>
<listitem><para>Multi-seat
management</para></listitem>
<listitem><para>Session
switch management</para></listitem>
<listitem><para>Device access management for
users</para></listitem>
<listitem><para>Automatic spawning of text
logins (gettys) on virtual console activation
and user runtime directory
management</para></listitem>
</itemizedlist>
<para>User sessions are registered in logind via the
<citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
PAM module.</para>
<para>See
<citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for information about the configuration of this
service.</para>
<para>See <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/multiseat">Multi-Seat
on Linux</ulink> for an introduction into basic
concepts of logind such as users, sessions and seats.</para>
<para>See the <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/logind">
logind D-Bus API Documentation</ulink> for information about
the APIs <filename>systemd-logind</filename>
provides.</para>
<para>For more information on the inhibition logic see
the <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
Lock Developer Documentation</ulink>.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-user-sessions.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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