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>
111 <para>When printing properties with <command>show</command>,
112 only print the value, and skip the property name and
113 <literal>=</literal>.</para>
118 <term><option>-a</option></term>
119 <term><option>--all</option></term>
121 <listitem><para>When showing session/user/seat properties,
122 show all properties regardless of whether they are set or
123 not.</para></listitem>
127 <term><option>-l</option></term>
128 <term><option>--full</option></term>
130 <listitem><para>Do not ellipsize process tree entries.</para>
135 <term><option>--kill-who=</option></term>
137 <listitem><para>When used with
138 <command>kill-session</command>, choose which processes to
139 kill. Must be one of <option>leader</option>, or
140 <option>all</option> to select whether to kill only the leader
141 process of the session or all processes of the session. If
142 omitted, defaults to <option>all</option>.</para></listitem>
146 <term><option>-s</option></term>
147 <term><option>--signal=</option></term>
149 <listitem><para>When used with <command>kill-session</command>
150 or <command>kill-user</command>, choose which signal to send
151 to selected processes. Must be one of the well known signal
152 specifiers, such as <constant>SIGTERM</constant>,
153 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
154 If omitted, defaults to
155 <constant>SIGTERM</constant>.</para></listitem>
158 <!-- 0 /// elogind does not support systemd-journal
160 <term><option>-n</option></term>
161 <term><option>--lines=</option></term>
163 <listitem><para>When used with <command>user-status</command>
164 and <command>session-status</command>, controls the number of
165 journal lines to show, counting from the most recent ones.
166 Takes a positive integer argument. Defaults to 10.</para>
171 <term><option>-o</option></term>
172 <term><option>--output=</option></term>
174 <listitem><para>When used with <command>user-status</command>
175 and <command>session-status</command>, controls the formatting
176 of the journal entries that are shown. For the available
178 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
179 Defaults to <literal>short</literal>.</para></listitem>
183 <xi:include href="user-system-options.xml" xpointer="host" />
184 <xi:include href="user-system-options.xml" xpointer="machine" />
186 <xi:include href="standard-options.xml" xpointer="no-pager" />
187 <xi:include href="standard-options.xml" xpointer="no-legend" />
188 <xi:include href="standard-options.xml" xpointer="help" />
189 <xi:include href="standard-options.xml" xpointer="version" />
194 <title>Commands</title>
196 <para>The following commands are understood:</para>
198 <refsect2><title>Session Commands</title><variablelist>
201 <term><command>list-sessions</command></term>
203 <listitem><para>List current sessions.</para></listitem>
207 <term><command>session-status</command> <optional><replaceable>ID</replaceable>…</optional></term>
209 <listitem><para>Show terse runtime status information about
210 one or more sessions, followed by the most recent log data
211 from the journal. Takes one or more session identifiers as
212 parameters. If no session identifiers are passed, the status of
213 the caller's session is shown. This function is intended to
214 generate human-readable output. If you are looking for
215 computer-parsable output, use <command>show-session</command>
216 instead.</para></listitem>
220 <term><command>show-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
222 <listitem><para>Show properties of one or more sessions or the
223 manager itself. If no argument is specified, properties of the
224 manager will be shown. If a session ID is specified,
225 properties of the session are shown. By default, empty
226 properties are suppressed. Use <option>--all</option> to show
227 those too. To select specific properties to show, use
228 <option>--property=</option>. This command is intended to be
229 used whenever computer-parsable output is required. Use
230 <command>session-status</command> if you are looking for
231 formatted human-readable output.</para></listitem>
235 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
237 <listitem><para>Activate a session. This brings a session into
238 the foreground if another session is currently in the
239 foreground on the respective seat. Takes a session identifier
240 as argument. If no argument is specified, the session of the
241 caller is put into foreground.</para></listitem>
245 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
246 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
248 <listitem><para>Activates/deactivates the screen lock on one
249 or more sessions, if the session supports it. Takes one or
250 more session identifiers as arguments. If no argument is
251 specified, the session of the caller is locked/unlocked.
256 <term><command>lock-sessions</command></term>
257 <term><command>unlock-sessions</command></term>
259 <listitem><para>Activates/deactivates the screen lock on all
260 current sessions supporting it. </para></listitem>
264 <term><command>terminate-session</command> <replaceable>ID</replaceable>…</term>
266 <listitem><para>Terminates a session. This kills all processes
267 of the session and deallocates all resources attached to the
268 session. </para></listitem>
272 <term><command>kill-session</command> <replaceable>ID</replaceable>…</term>
274 <listitem><para>Send a signal to one or more processes of the
275 session. Use <option>--kill-who=</option> to select which
276 process to kill. Use <option>--signal=</option> to select the
277 signal to send.</para></listitem>
279 </variablelist></refsect2>
281 <refsect2><title>User Commands</title><variablelist>
283 <term><command>list-users</command></term>
285 <listitem><para>List currently logged in users.
290 <term><command>user-status</command> <optional><replaceable>USER</replaceable>…</optional></term>
292 <listitem><para>Show terse runtime status information about
293 one or more logged in users, followed by the most recent log
294 data from the journal. Takes one or more user names or numeric
295 user IDs as parameters. If no parameters are passed, the status
296 is shown for the user of the session of the caller. This
297 function is intended to generate human-readable output. If you
298 are looking for computer-parsable output, use
299 <command>show-user</command> instead.</para></listitem>
303 <term><command>show-user</command> <optional><replaceable>USER</replaceable>…</optional></term>
305 <listitem><para>Show properties of one or more users or the
306 manager itself. If no argument is specified, properties of the
307 manager will be shown. If a user is specified, properties of
308 the user are shown. By default, empty properties are
309 suppressed. Use <option>--all</option> to show those too. To
310 select specific properties to show, use
311 <option>--property=</option>. This command is intended to be
312 used whenever computer-parsable output is required. Use
313 <command>user-status</command> if you are looking for
314 formatted human-readable output.</para></listitem>
317 <!-- 0 /// elogind does not spawn a user manager. Mask until lingeringin elogind is clarified.
319 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
320 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
322 <listitem><para>Enable/disable user lingering for one or more
323 users. If enabled for a specific user, a user manager is
324 spawned for the user at boot and kept around after logouts.
325 This allows users who are not logged in to run long-running
326 services. Takes one or more user names or numeric UIDs as
327 argument. If no argument is specified, enables/disables
328 lingering for the user of the session of the caller.</para>
330 <para>See also <varname>KillUserProcesses=</varname> setting in
331 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
337 <term><command>terminate-user</command> <replaceable>USER</replaceable>…</term>
339 <listitem><para>Terminates all sessions of a user. This kills
340 all processes of all sessions of the user and deallocates all
341 runtime resources attached to the user.</para></listitem>
345 <term><command>kill-user</command> <replaceable>USER</replaceable>…</term>
347 <listitem><para>Send a signal to all processes of a user. Use
348 <option>--signal=</option> to select the signal to send.
351 </variablelist></refsect2>
353 <refsect2><title>Seat Commands</title><variablelist>
355 <term><command>list-seats</command></term>
357 <listitem><para>List currently available seats on the local
358 system.</para></listitem>
362 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>…</optional></term>
364 <listitem><para>Show terse runtime status information about
365 one or more seats. Takes one or more seat names as parameters.
366 If no seat names are passed the status of the caller's
367 session's seat is shown. This function is intended to generate
368 human-readable output. If you are looking for
369 computer-parsable output, use <command>show-seat</command>
370 instead.</para></listitem>
374 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>…</optional></term>
376 <listitem><para>Show properties of one or more seats or the
377 manager itself. If no argument is specified, properties of the
378 manager will be shown. If a seat is specified, properties of
379 the seat are shown. By default, empty properties are
380 suppressed. Use <option>--all</option> to show those too. To
381 select specific properties to show, use
382 <option>--property=</option>. This command is intended to be
383 used whenever computer-parsable output is required. Use
384 <command>seat-status</command> if you are looking for
385 formatted human-readable output.</para></listitem>
389 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>…</term>
391 <listitem><para>Persistently attach one or more devices to a
392 seat. The devices should be specified via device paths in the
393 <filename>/sys</filename> file system. To create a new seat,
394 attach at least one graphics card to a previously unused seat
395 name. Seat names may consist only of a–z, A–Z, 0–9,
396 <literal>-</literal> and <literal>_</literal> and must be
397 prefixed with <literal>seat</literal>. To drop assignment of a
398 device to a specific seat, just reassign it to a different
399 seat, or use <command>flush-devices</command>.
404 <term><command>flush-devices</command></term>
406 <listitem><para>Removes all device assignments previously
407 created with <command>attach</command>. After this call, only
408 automatically generated seats will remain, and all seat
409 hardware is assigned to them.</para></listitem>
413 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>…</term>
415 <listitem><para>Terminates all sessions on a seat. This kills
416 all processes of all sessions on the seat and deallocates all
417 runtime resources attached to them.</para></listitem>
419 </variablelist></refsect2>
421 <!-- 1 /// elogind additionally supports a few systemctl commands. -->
422 <refsect2><title>System Commands</title><variablelist>
424 <term><command>poweroff</command></term>
427 <para>Print a wall message to all users, shut down and
428 power-off the system.</para>
432 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
435 <para>Print a wall message to all users, shut down and
436 reboot the system.</para>
438 <para>If the optional argument
439 <replaceable>arg</replaceable> is given, it will be passed
440 as the optional argument to the
441 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
442 system call. The value is architecture and firmware
443 specific. As an example, <literal>recovery</literal> might
444 be used to trigger system recovery, and
445 <literal>fota</literal> might be used to trigger a
446 <quote>firmware over the air</quote> update.</para>
451 <term><command>suspend</command></term>
454 <para>Suspend the system.
460 <term><command>hibernate</command></term>
463 <para>Hibernate the system.
469 <term><command>hybrid-sleep</command></term>
472 <para>Hibernate and suspend the system.</para>
475 </variablelist></refsect2>
480 <title>Exit status</title>
482 <para>On success, 0 is returned, a non-zero failure code
487 <title>Examples</title>
490 <title>Querying user status</title>
492 <!-- 0 /// With elogind no Unit and jurnald output is generated
493 <programlisting>$ loginctl user-status
495 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
498 Unit: user-1005.slice
504 ├─3473 login -- fatima
507 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
508 session opened for user fatima by LOGIN(uid=0)
509 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
512 <programlisting>$ loginctl user-status
514 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
517 Unit: user-1005.slice
521 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
522 marked with a star. The tree of processing including the two corresponding
523 scope units and the user manager unit are shown.</para>
527 <xi:include href="less-variables.xml" />
530 <title>See Also</title>
532 <!-- 0 /// elogind is in section 8
533 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
534 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
535 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
537 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
539 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>