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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
10 | Copyright 2010 Lennart Poettering | |
11 | ||
12 | systemd is free software; you can redistribute it and/or modify it | |
13 | under the terms of the GNU Lesser General Public License as published by | |
14 | the Free Software Foundation; either version 2.1 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | systemd is distributed in the hope that it will be useful, but | |
18 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | Lesser General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU Lesser General Public License | |
23 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
24 | --> | |
25 | ||
4fe52119 | 26 | <refentry id="systemd-logind.service" conditional='ENABLE_LOGIND'> |
af3bccd6 | 27 | |
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28 | <refentryinfo> |
29 | <title>systemd-logind.service</title> | |
30 | <productname>systemd</productname> | |
31 | ||
32 | <authorgroup> | |
33 | <author> | |
34 | <contrib>Developer</contrib> | |
35 | <firstname>Lennart</firstname> | |
36 | <surname>Poettering</surname> | |
37 | <email>lennart@poettering.net</email> | |
38 | </author> | |
39 | </authorgroup> | |
40 | </refentryinfo> | |
41 | ||
42 | <refmeta> | |
43 | <refentrytitle>systemd-logind.service</refentrytitle> | |
44 | <manvolnum>8</manvolnum> | |
45 | </refmeta> | |
46 | ||
47 | <refnamediv> | |
48 | <refname>systemd-logind.service</refname> | |
49 | <refname>systemd-logind</refname> | |
50 | <refpurpose>Login manager</refpurpose> | |
51 | </refnamediv> | |
52 | ||
53 | <refsynopsisdiv> | |
54 | <para><filename>systemd-logind.service</filename></para> | |
12b42c76 | 55 | <para><filename>/usr/lib/systemd/systemd-logind</filename></para> |
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56 | </refsynopsisdiv> |
57 | ||
58 | <refsect1> | |
59 | <title>Description</title> | |
60 | ||
61 | <para><command>systemd-logind</command> is a system service that | |
62 | manages user logins. It is responsible for:</para> | |
63 | ||
64 | <itemizedlist> | |
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65 | <listitem><para>Keeping track of users and sessions, their processes and their idle state. This is implemented by |
66 | allocating a systemd slice unit for each user below <filename>user.slice</filename>, and a scope unit below it | |
67 | for each concurrent session of a user. Also, a per-user service manager is started as system service instance of | |
0ae42c9b | 68 | <filename>user@.service</filename> for each logged in user.</para></listitem> |
66a5b902 | 69 | |
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70 | <listitem><para>Generating and managing session IDs. If auditing is available and an audit session ID is already set for |
71 | a session, then this ID is reused as the session ID. Otherwise, an independent session counter is | |
66a5b902 | 72 | used.</para></listitem> |
798d3a52 | 73 | |
0ae42c9b | 74 | <listitem><para>Providing PolicyKit-based access for users for |
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75 | operations such as system shutdown or sleep</para></listitem> |
76 | ||
77 | <listitem><para>Implementing a shutdown/sleep inhibition logic | |
78 | for applications</para></listitem> | |
79 | ||
80 | <listitem><para>Handling of power/sleep hardware | |
81 | keys</para></listitem> | |
82 | ||
83 | <listitem><para>Multi-seat management</para></listitem> | |
84 | ||
85 | <listitem><para>Session switch management</para></listitem> | |
86 | ||
87 | <listitem><para>Device access management for | |
88 | users</para></listitem> | |
89 | ||
90 | <listitem><para>Automatic spawning of text logins (gettys) on | |
91 | virtual console activation and user runtime directory | |
92 | management</para></listitem> | |
93 | </itemizedlist> | |
94 | ||
05b2a8fd | 95 | <para>User sessions are registered with logind via the |
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96 | <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry> |
97 | PAM module.</para> | |
98 | ||
99 | <para>See | |
100 | <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
101 | for information about the configuration of this service.</para> | |
102 | ||
103 | <para>See <ulink | |
28a0ad81 | 104 | url="https://www.freedesktop.org/wiki/Software/systemd/multiseat">Multi-Seat |
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105 | on Linux</ulink> for an introduction into basic concepts of logind |
106 | such as users, sessions and seats.</para> | |
107 | ||
108 | <para>See the <ulink | |
28a0ad81 | 109 | url="https://www.freedesktop.org/wiki/Software/systemd/logind"> |
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110 | logind D-Bus API Documentation</ulink> for information about the |
111 | APIs <filename>systemd-logind</filename> provides.</para> | |
112 | ||
113 | <para>For more information on the inhibition logic see the <ulink | |
28a0ad81 | 114 | url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor |
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115 | Lock Developer Documentation</ulink>.</para> |
116 | </refsect1> | |
117 | ||
118 | <refsect1> | |
119 | <title>See Also</title> | |
120 | <para> | |
121 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
122 | <citerefentry><refentrytitle>systemd-user-sessions.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
123 | <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
124 | <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
125 | <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
126 | </para> | |
127 | </refsect1> | |
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128 | |
129 | </refentry> |