man/systemd-logind.service.xml

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  10   Copyright 2010 Lennart Poettering
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  25
  26 <refentry id="systemd-logind.service" conditional='ENABLE_LOGIND'>
  27
  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>
  55     <para><filename>/usr/lib/systemd/systemd-logind</filename></para>
  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>
  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
  68       <filename>user@.service</filename> for each logged in user.</para></listitem>
  69
  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
  72       used.</para></listitem>
  73
  74       <listitem><para>Providing PolicyKit-based access for users for
  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
  95     <para>User sessions are registered with logind via the
  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
 104     <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 105     for information about the basic concepts of logind
 106     such as users, sessions and seats.</para>
 107
 108     <para>See the <ulink
 109     url="https://www.freedesktop.org/wiki/Software/systemd/logind">
 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
 114     url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
 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       <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 127     </para>
 128   </refsect1>
 129
 130 </refentry>