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authorLuke Shumaker <lukeshu@sbcglobal.net>2016-09-13 21:24:07 -0400
committerLuke Shumaker <lukeshu@sbcglobal.net>2016-09-13 21:24:07 -0400
commitce31ec116f9bf4ad45952b6a200f4181fac311a3 (patch)
tree95bc9042a11e7f4773f10d72745396c9f46ed0ef /src/grp-login/systemd-logind/logind.conf.xml
parentc73c7c774cbd1f0e778254d51da819490a333ab4 (diff)
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+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<!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="logind.conf" conditional='ENABLE_LOGIND'
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+ <refentryinfo>
+ <title>logind.conf</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>logind.conf</refentrytitle>
+ <manvolnum>5</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>logind.conf</refname>
+ <refname>logind.conf.d</refname>
+ <refpurpose>Login manager configuration files</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>/etc/systemd/logind.conf</filename></para>
+ <para><filename>/etc/systemd/logind.conf.d/*.conf</filename></para>
+ <para><filename>/run/systemd/logind.conf.d/*.conf</filename></para>
+ <para><filename>/usr/lib/systemd/logind.conf.d/*.conf</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These files configure various parameters of the systemd
+ login manager,
+ <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
+ </para>
+ </refsect1>
+
+ <xi:include href="standard-conf.xml" xpointer="main-conf" />
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>All options are configured in the
+ <literal>[Login]</literal> section:</para>
+
+ <variablelist>
+
+ <varlistentry>
+ <term><varname>NAutoVTs=</varname></term>
+
+ <listitem><para>Takes a positive integer. Configures how many
+ virtual terminals (VTs) to allocate by default that, when
+ switched to and are previously unused,
+ <literal>autovt</literal> services are automatically spawned
+ on. These services are instantiated from the template unit
+ <filename>autovt@.service</filename> for the respective VT TTY
+ name, for example, <filename>autovt@tty4.service</filename>.
+ By default, <filename>autovt@.service</filename> is linked to
+ <filename>getty@.service</filename>. In other words, login
+ prompts are started dynamically as the user switches to unused
+ virtual terminals. Hence, this parameter controls how many
+ login <literal>gettys</literal> are available on the VTs. If a
+ VT is already used by some other subsystem (for example, a
+ graphical login), this kind of activation will not be
+ attempted. Note that the VT configured in
+ <varname>ReserveVT=</varname> is always subject to this kind
+ of activation, even if it is not one of the VTs configured
+ with the <varname>NAutoVTs=</varname> directive. Defaults to
+ 6. When set to 0, automatic spawning of
+ <literal>autovt</literal> services is
+ disabled.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>ReserveVT=</varname></term>
+
+ <listitem><para>Takes a positive integer. Identifies one
+ virtual terminal that shall unconditionally be reserved for
+ <filename>autovt@.service</filename> activation (see above).
+ The VT selected with this option will be marked busy
+ unconditionally, so that no other subsystem will allocate it.
+ This functionality is useful to ensure that, regardless of how
+ many VTs are allocated by other subsystems, one login
+ <literal>getty</literal> is always available. Defaults to 6
+ (in other words, there will always be a
+ <literal>getty</literal> available on Alt-F6.). When set to 0,
+ VT reservation is disabled.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>KillUserProcesses=</varname></term>
+
+ <listitem><para>Takes a boolean argument. Configures whether the processes of a
+ user should be killed when the user logs out. If true, the scope unit
+ corresponding to the session and all processes inside that scope will be
+ terminated. If false, the scope is "abandoned", see
+ <citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ and processes are not killed. Defaults to <literal>yes</literal>,
+ but see the options <varname>KillOnlyUsers=</varname> and
+ <varname>KillExcludeUsers=</varname> below.</para>
+
+ <para>In addition to session processes, user process may run under the user
+ manager unit <filename>user@.service</filename>. Depending on the linger
+ settings, this may allow users to run processes independent of their login
+ sessions. See the description of <command>enable-linger</command> in
+ <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ </para>
+
+ <para>Note that setting <varname>KillUserProcesses=yes</varname>
+ will break tools like
+ <citerefentry project='die-net'><refentrytitle>screen</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ and
+ <citerefentry project='die-net'><refentrytitle>tmux</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ unless they are moved out of the session scope. See example in
+ <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>KillOnlyUsers=</varname></term>
+ <term><varname>KillExcludeUsers=</varname></term>
+
+ <listitem><para>These settings take space-separated lists of usernames that override
+ the <varname>KillUserProcesses=</varname> setting. A user name may be added to
+ <varname>KillExcludeUsers=</varname> to exclude the processes in the session scopes of
+ that user from being killed even if <varname>KillUserProcesses=yes</varname> is set. If
+ <varname>KillExcludeUsers=</varname> is not set, the <literal>root</literal> user is
+ excluded by default. <varname>KillExcludeUsers=</varname> may be set to an empty value
+ to override this default. If a user is not excluded, <varname>KillOnlyUsers=</varname>
+ is checked next. If this setting is specified, only the session scopes of those users
+ will be killed. Otherwise, users are subject to the
+ <varname>KillUserProcesses=yes</varname> setting.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>IdleAction=</varname></term>
+
+ <listitem><para>Configures the action to take when the system
+ is idle. Takes one of
+ <literal>ignore</literal>,
+ <literal>poweroff</literal>,
+ <literal>reboot</literal>,
+ <literal>halt</literal>,
+ <literal>kexec</literal>,
+ <literal>suspend</literal>,
+ <literal>hibernate</literal>,
+ <literal>hybrid-sleep</literal>, and
+ <literal>lock</literal>.
+ Defaults to <literal>ignore</literal>.</para>
+
+ <para>Note that this requires that user sessions correctly
+ report the idle status to the system. The system will execute
+ the action after all sessions report that they are idle, no
+ idle inhibitor lock is active, and subsequently, the time
+ configured with <varname>IdleActionSec=</varname> (see below)
+ has expired.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>IdleActionSec=</varname></term>
+
+ <listitem><para>Configures the delay after which the action
+ configured in <varname>IdleAction=</varname> (see above) is
+ taken after the system is idle.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>InhibitDelayMaxSec=</varname></term>
+
+ <listitem><para>Specifies the maximum time a system shutdown
+ or sleep request is delayed due to an inhibitor lock of type
+ <literal>delay</literal> being active before the inhibitor is
+ ignored and the operation executes anyway. Defaults to
+ 5.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>HandlePowerKey=</varname></term>
+ <term><varname>HandleSuspendKey=</varname></term>
+ <term><varname>HandleHibernateKey=</varname></term>
+ <term><varname>HandleLidSwitch=</varname></term>
+ <term><varname>HandleLidSwitchDocked=</varname></term>
+
+ <listitem><para>Controls whether logind shall handle the
+ system power and sleep keys and the lid switch to trigger
+ actions such as system power-off or suspend. Can be one of
+ <literal>ignore</literal>,
+ <literal>poweroff</literal>,
+ <literal>reboot</literal>,
+ <literal>halt</literal>,
+ <literal>kexec</literal>,
+ <literal>suspend</literal>,
+ <literal>hibernate</literal>,
+ <literal>hybrid-sleep</literal>, and
+ <literal>lock</literal>.
+ If <literal>ignore</literal>, logind will never handle these
+ keys. If <literal>lock</literal>, all running sessions will be
+ screen-locked; otherwise, the specified action will be taken
+ in the respective event. Only input devices with the
+ <literal>power-switch</literal> udev tag will be watched for
+ key/lid switch events. <varname>HandlePowerKey=</varname>
+ defaults to <literal>poweroff</literal>.
+ <varname>HandleSuspendKey=</varname> and
+ <varname>HandleLidSwitch=</varname> default to
+ <literal>suspend</literal>.
+ <varname>HandleLidSwitchDocked=</varname> defaults to
+ <literal>ignore</literal>.
+ <varname>HandleHibernateKey=</varname> defaults to
+ <literal>hibernate</literal>. If the system is inserted in a
+ docking station, or if more than one display is connected, the
+ action specified by <varname>HandleLidSwitchDocked=</varname>
+ occurs; otherwise the <varname>HandleLidSwitch=</varname>
+ action occurs.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PowerKeyIgnoreInhibited=</varname></term>
+ <term><varname>SuspendKeyIgnoreInhibited=</varname></term>
+ <term><varname>HibernateKeyIgnoreInhibited=</varname></term>
+ <term><varname>LidSwitchIgnoreInhibited=</varname></term>
+
+ <listitem><para>Controls whether actions triggered by the
+ power and sleep keys and the lid switch are subject to
+ inhibitor locks. These settings take boolean arguments. If
+ <literal>no</literal>, the inhibitor locks taken by
+ applications in order to block the requested operation are
+ respected. If <literal>yes</literal>, the requested operation
+ is executed in any case.
+ <varname>PowerKeyIgnoreInhibited=</varname>,
+ <varname>SuspendKeyIgnoreInhibited=</varname> and
+ <varname>HibernateKeyIgnoreInhibited=</varname> default to
+ <literal>no</literal>.
+ <varname>LidSwitchIgnoreInhibited=</varname> defaults to
+ <literal>yes</literal>. This means that the lid switch does
+ not respect suspend blockers by default, but the power and
+ sleep keys do. </para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>HoldoffTimeoutSec=</varname></term>
+
+ <listitem><para>Specifies the timeout after system startup or
+ system resume in which systemd will hold off on reacting to
+ lid events. This is required for the system to properly
+ detect any hotplugged devices so systemd can ignore lid events
+ if external monitors, or docks, are connected. If set to 0,
+ systemd will always react immediately, possibly before the
+ kernel fully probed all hotplugged devices. This is safe, as
+ long as you do not care for systemd to account for devices
+ that have been plugged or unplugged while the system was off.
+ Defaults to 30s.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>RuntimeDirectorySize=</varname></term>
+
+ <listitem><para>Sets the size limit on the
+ <varname>$XDG_RUNTIME_DIR</varname> runtime directory for each
+ user who logs in. Takes a size in bytes, optionally suffixed
+ with the usual K, G, M, and T suffixes, to the base 1024
+ (IEC). Alternatively, a numerical percentage suffixed by
+ <literal>%</literal> may be specified, which sets the size
+ limit relative to the amount of physical RAM. Defaults to 10%.
+ Note that this size is a safety limit only. As each runtime
+ directory is a tmpfs file system, it will only consume as much
+ memory as is needed.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>InhibitorsMax=</varname></term>
+
+ <listitem><para>Controls the maximum number of concurrent inhibitors to permit. Defaults to 8192
+ (8K).</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SessionsMax=</varname></term>
+
+ <listitem><para>Controls the maximum number of concurrent user sessions to manage. Defaults to 8192
+ (8K). Depending on how the <filename>pam_systemd.so</filename> module is included in the PAM stack
+ configuration, further login sessions will either be refused, or permitted but not tracked by
+ <filename>systemd-logind</filename>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>UserTasksMax=</varname></term>
+
+ <listitem><para>Sets the maximum number of OS tasks each user may run concurrently. This controls the
+ <varname>TasksMax=</varname> setting of the per-user slice unit, see
+ <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for details. Defaults to 33%, which equals 10813 with the kernel's defaults on the host, but might be smaller
+ in OS containers.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>RemoveIPC=</varname></term>
+
+ <listitem><para>Controls whether System V and POSIX IPC objects belonging to the user shall be removed when the
+ user fully logs out. Takes a boolean argument. If enabled, the user may not consume IPC resources after the
+ last of the user's sessions terminated. This covers System V semaphores, shared memory and message queues, as
+ well as POSIX shared memory and message queues. Note that IPC objects of the root user and other system users
+ are excluded from the effect of this setting. Defaults to <literal>yes</literal>.</para></listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>