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| <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
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| <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
| |
| <refentry id="systemd-logind.service" conditional='ENABLE_LOGIND'> |
| |
| <refentryinfo> |
| <title>systemd-logind.service</title> |
| <productname>systemd</productname> |
| </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><command>systemd-logind</command> 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. This is implemented by |
| allocating a systemd slice unit for each user below <filename>user.slice</filename>, and a scope unit below it |
| for each concurrent session of a user. Also, a per-user service manager is started as system service instance of |
| <filename>user@.service</filename> for each logged in user.</para></listitem> |
| |
| <listitem><para>Generating and managing session IDs. If auditing is available and an audit session ID is already set for |
| a session, then this ID is reused as the session ID. Otherwise, an independent session counter is |
| used.</para></listitem> |
| |
| <listitem><para>Providing <ulink |
| url="http://www.freedesktop.org/wiki/Software/polkit">polkit</ulink>-based |
| access for users for 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 with 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 |
| <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| for information about the basic concepts of logind |
| such as users, sessions and seats.</para> |
| |
| <para>See |
| <citerefentry><refentrytitle>org.freedesktop.login1</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
| and |
| <citerefentry><refentrytitle>org.freedesktop.LogControl1</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
| for information about the D-Bus APIs <filename>systemd-logind</filename> provides.</para> |
| |
| <para>For more information on the inhibition logic see the <ulink |
| url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor |
| Lock Developer Documentation</ulink>.</para> |
| |
| <para>If you are interested in writing a display manager that makes use of logind, please have look at |
| <ulink url="https://www.freedesktop.org/wiki/Software/systemd/writing-display-managers">Writing Display |
| Managers</ulink>. |
| If you are interested in writing a desktop environment that makes use of logind, please have look at |
| <ulink url="http://www.freedesktop.org/wiki/Software/systemd/writing-desktop-environments">Writing |
| Desktop Environments</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>, |
| <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| </para> |
| </refsect1> |
| |
| </refentry> |