1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
6 This file is part of elogind.
7 SPDX-License-Identifier: LGPL-2.1+
10 Copyright 2010 Lennart Poettering
12 elogind 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.
17 elogind 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.
22 You should have received a copy of the GNU Lesser General Public License
23 along with elogind; If not, see <http://www.gnu.org/licenses/>.
26 <!-- 0 /// elogind does not need to activate loginctl in configure
27 <refentry id="loginctl" conditional='ENABLE_LOGIND'
28 xmlns:xi="http://www.w3.org/2001/XInclude">
30 <refentry id="loginctl" xmlns:xi="http://www.w3.org/2001/XInclude">
34 <title>loginctl</title>
35 <productname>elogind</productname>
39 <contrib>Developer</contrib>
40 <firstname>Lennart</firstname>
41 <surname>Poettering</surname>
42 <email>lennart@poettering.net</email>
48 <refentrytitle>loginctl</refentrytitle>
49 <manvolnum>1</manvolnum>
53 <refname>loginctl</refname>
54 <refpurpose>Control the elogind login manager</refpurpose>
59 <command>loginctl</command>
60 <arg choice="opt" rep="repeat">OPTIONS</arg>
61 <arg choice="req">COMMAND</arg>
62 <arg choice="opt" rep="repeat">NAME</arg>
67 <title>Description</title>
69 <para><command>loginctl</command> may be used to introspect and
70 control the state of the
71 <!-- 0 /// elogind has no services and is in section 8
72 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
74 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
76 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>
82 <title>Options</title>
84 <para>The following options are understood:</para>
88 <term><option>--no-ask-password</option></term>
90 <listitem><para>Do not query the user for authentication for
91 privileged operations.</para></listitem>
95 <term><option>-p</option></term>
96 <term><option>--property=</option></term>
98 <listitem><para>When showing session/user/seat properties,
99 limit display to certain properties as specified as argument.
100 If not specified, all set properties are shown. The argument
101 should be a property name, such as
102 <literal>Sessions</literal>. If specified more than once, all
103 properties with the specified names are
104 shown.</para></listitem>
108 <term><option>--value</option></term>
110 <listitem><para>When showing session/user/seat properties,
111 only print the value, and skip the property name and
112 <literal>=</literal>.</para></listitem>
116 <term><option>-a</option></term>
117 <term><option>--all</option></term>
119 <listitem><para>When showing session/user/seat properties,
120 show all properties regardless of whether they are set or
121 not.</para></listitem>
125 <term><option>-l</option></term>
126 <term><option>--full</option></term>
128 <listitem><para>Do not ellipsize process tree entries.</para>
133 <term><option>--kill-who=</option></term>
135 <listitem><para>When used with
136 <command>kill-session</command>, choose which processes to
137 kill. Must be one of <option>leader</option>, or
138 <option>all</option> to select whether to kill only the leader
139 process of the session or all processes of the session. If
140 omitted, defaults to <option>all</option>.</para></listitem>
144 <term><option>-s</option></term>
145 <term><option>--signal=</option></term>
147 <listitem><para>When used with <command>kill-session</command>
148 or <command>kill-user</command>, choose which signal to send
149 to selected processes. Must be one of the well known signal
150 specifiers, such as <constant>SIGTERM</constant>,
151 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
152 If omitted, defaults to
153 <constant>SIGTERM</constant>.</para></listitem>
156 <!-- 0 /// elogind does not support systemd-journal
158 <term><option>-n</option></term>
159 <term><option>--lines=</option></term>
161 <listitem><para>When used with <command>user-status</command>
162 and <command>session-status</command>, controls the number of
163 journal lines to show, counting from the most recent ones.
164 Takes a positive integer argument. Defaults to 10.</para>
169 <term><option>-o</option></term>
170 <term><option>--output=</option></term>
172 <listitem><para>When used with <command>user-status</command>
173 and <command>session-status</command>, controls the formatting
174 of the journal entries that are shown. For the available
176 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
177 Defaults to <literal>short</literal>.</para></listitem>
181 <xi:include href="user-system-options.xml" xpointer="host" />
182 <xi:include href="user-system-options.xml" xpointer="machine" />
184 <xi:include href="standard-options.xml" xpointer="no-pager" />
185 <xi:include href="standard-options.xml" xpointer="no-legend" />
186 <xi:include href="standard-options.xml" xpointer="help" />
187 <xi:include href="standard-options.xml" xpointer="version" />
192 <title>Commands</title>
194 <para>The following commands are understood:</para>
196 <refsect2><title>Session Commands</title><variablelist>
199 <term><command>list-sessions</command></term>
201 <listitem><para>List current sessions.</para></listitem>
205 <term><command>session-status</command> <optional><replaceable>ID</replaceable>…</optional></term>
207 <listitem><para>Show terse runtime status information about
208 one or more sessions, followed by the most recent log data
209 from the journal. Takes one or more session identifiers as
210 parameters. If no session identifiers are passed, the status of
211 the caller's session is shown. This function is intended to
212 generate human-readable output. If you are looking for
213 computer-parsable output, use <command>show-session</command>
214 instead.</para></listitem>
218 <term><command>show-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
220 <listitem><para>Show properties of one or more sessions or the
221 manager itself. If no argument is specified, properties of the
222 manager will be shown. If a session ID is specified,
223 properties of the session are shown. By default, empty
224 properties are suppressed. Use <option>--all</option> to show
225 those too. To select specific properties to show, use
226 <option>--property=</option>. This command is intended to be
227 used whenever computer-parsable output is required. Use
228 <command>session-status</command> if you are looking for
229 formatted human-readable output.</para></listitem>
233 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
235 <listitem><para>Activate a session. This brings a session into
236 the foreground if another session is currently in the
237 foreground on the respective seat. Takes a session identifier
238 as argument. If no argument is specified, the session of the
239 caller is put into foreground.</para></listitem>
243 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
244 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
246 <listitem><para>Activates/deactivates the screen lock on one
247 or more sessions, if the session supports it. Takes one or
248 more session identifiers as arguments. If no argument is
249 specified, the session of the caller is locked/unlocked.
254 <term><command>lock-sessions</command></term>
255 <term><command>unlock-sessions</command></term>
257 <listitem><para>Activates/deactivates the screen lock on all
258 current sessions supporting it. </para></listitem>
262 <term><command>terminate-session</command> <replaceable>ID</replaceable>…</term>
264 <listitem><para>Terminates a session. This kills all processes
265 of the session and deallocates all resources attached to the
266 session. </para></listitem>
270 <term><command>kill-session</command> <replaceable>ID</replaceable>…</term>
272 <listitem><para>Send a signal to one or more processes of the
273 session. Use <option>--kill-who=</option> to select which
274 process to kill. Use <option>--signal=</option> to select the
275 signal to send.</para></listitem>
277 </variablelist></refsect2>
279 <refsect2><title>User Commands</title><variablelist>
281 <term><command>list-users</command></term>
283 <listitem><para>List currently logged in users.
288 <term><command>user-status</command> <optional><replaceable>USER</replaceable>…</optional></term>
290 <listitem><para>Show terse runtime status information about
291 one or more logged in users, followed by the most recent log
292 data from the journal. Takes one or more user names or numeric
293 user IDs as parameters. If no parameters are passed, the status
294 is shown for the user of the session of the caller. This
295 function is intended to generate human-readable output. If you
296 are looking for computer-parsable output, use
297 <command>show-user</command> instead.</para></listitem>
301 <term><command>show-user</command> <optional><replaceable>USER</replaceable>…</optional></term>
303 <listitem><para>Show properties of one or more users or the
304 manager itself. If no argument is specified, properties of the
305 manager will be shown. If a user is specified, properties of
306 the user are shown. By default, empty properties are
307 suppressed. Use <option>--all</option> to show those too. To
308 select specific properties to show, use
309 <option>--property=</option>. This command is intended to be
310 used whenever computer-parsable output is required. Use
311 <command>user-status</command> if you are looking for
312 formatted human-readable output.</para></listitem>
315 <!-- 0 /// elogind does not spawn a user manager. Mask until lingeringin elogind is clarified.
317 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
318 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
320 <listitem><para>Enable/disable user lingering for one or more
321 users. If enabled for a specific user, a user manager is
322 spawned for the user at boot and kept around after logouts.
323 This allows users who are not logged in to run long-running
324 services. Takes one or more user names or numeric UIDs as
325 argument. If no argument is specified, enables/disables
326 lingering for the user of the session of the caller.</para>
328 <para>See also <varname>KillUserProcesses=</varname> setting in
329 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
335 <term><command>terminate-user</command> <replaceable>USER</replaceable>…</term>
337 <listitem><para>Terminates all sessions of a user. This kills
338 all processes of all sessions of the user and deallocates all
339 runtime resources attached to the user.</para></listitem>
343 <term><command>kill-user</command> <replaceable>USER</replaceable>…</term>
345 <listitem><para>Send a signal to all processes of a user. Use
346 <option>--signal=</option> to select the signal to send.
349 </variablelist></refsect2>
351 <refsect2><title>Seat Commands</title><variablelist>
353 <term><command>list-seats</command></term>
355 <listitem><para>List currently available seats on the local
356 system.</para></listitem>
360 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>…</optional></term>
362 <listitem><para>Show terse runtime status information about
363 one or more seats. Takes one or more seat names as parameters.
364 If no seat names are passed the status of the caller's
365 session's seat is shown. This function is intended to generate
366 human-readable output. If you are looking for
367 computer-parsable output, use <command>show-seat</command>
368 instead.</para></listitem>
372 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>…</optional></term>
374 <listitem><para>Show properties of one or more seats or the
375 manager itself. If no argument is specified, properties of the
376 manager will be shown. If a seat is specified, properties of
377 the seat are shown. By default, empty properties are
378 suppressed. Use <option>--all</option> to show those too. To
379 select specific properties to show, use
380 <option>--property=</option>. This command is intended to be
381 used whenever computer-parsable output is required. Use
382 <command>seat-status</command> if you are looking for
383 formatted human-readable output.</para></listitem>
387 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>…</term>
389 <listitem><para>Persistently attach one or more devices to a
390 seat. The devices should be specified via device paths in the
391 <filename>/sys</filename> file system. To create a new seat,
392 attach at least one graphics card to a previously unused seat
393 name. Seat names may consist only of a–z, A–Z, 0–9,
394 <literal>-</literal> and <literal>_</literal> and must be
395 prefixed with <literal>seat</literal>. To drop assignment of a
396 device to a specific seat, just reassign it to a different
397 seat, or use <command>flush-devices</command>.
402 <term><command>flush-devices</command></term>
404 <listitem><para>Removes all device assignments previously
405 created with <command>attach</command>. After this call, only
406 automatically generated seats will remain, and all seat
407 hardware is assigned to them.</para></listitem>
411 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>…</term>
413 <listitem><para>Terminates all sessions on a seat. This kills
414 all processes of all sessions on the seat and deallocates all
415 runtime resources attached to them.</para></listitem>
417 </variablelist></refsect2>
419 <!-- 1 /// elogind additionally supports a few systemctl commands. -->
420 <refsect2><title>System Commands</title><variablelist>
422 <term><command>poweroff</command></term>
425 <para>Print a wall message to all users, shut down and
426 power-off the system.</para>
430 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
433 <para>Print a wall message to all users, shut down and
434 reboot the system.</para>
436 <para>If the optional argument
437 <replaceable>arg</replaceable> is given, it will be passed
438 as the optional argument to the
439 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
440 system call. The value is architecture and firmware
441 specific. As an example, <literal>recovery</literal> might
442 be used to trigger system recovery, and
443 <literal>fota</literal> might be used to trigger a
444 <quote>firmware over the air</quote> update.</para>
449 <term><command>suspend</command></term>
452 <para>Suspend the system.
458 <term><command>hibernate</command></term>
461 <para>Hibernate the system.
467 <term><command>hybrid-sleep</command></term>
470 <para>Hibernate and suspend the system.</para>
473 </variablelist></refsect2>
478 <title>Exit status</title>
480 <para>On success, 0 is returned, a non-zero failure code
485 <title>Examples</title>
488 <title>Querying user status</title>
490 <!-- 0 /// With elogind no Unit and jurnald output is generated
491 <programlisting>$ loginctl user-status
493 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
496 Unit: user-1005.slice
502 ├─3473 login -- fatima
505 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
506 session opened for user fatima by LOGIN(uid=0)
507 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
510 <programlisting>$ loginctl user-status
512 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
515 Unit: user-1005.slice
519 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
520 marked with a star. The tree of processing including the two corresponding
521 scope units and the user manager unit are shown.</para>
525 <xi:include href="less-variables.xml" />
528 <title>See Also</title>
530 <!-- 0 /// elogind is in section 8
531 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
532 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
533 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
535 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
537 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>