Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ 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="pam_systemd">
+<refentry id="pam_systemd" conditional='HAVE_PAM'>
<refentryinfo>
<title>pam_systemd</title>
<refnamediv>
<refname>pam_systemd</refname>
- <refpurpose>Register user sessions in the systemd control group hierarchy</refpurpose>
+ <refpurpose>Register user sessions in the systemd login manager</refpurpose>
</refnamediv>
<refsynopsisdiv>
- <cmdsynopsis>
- <command>pam_systemd.so</command>
- </cmdsynopsis>
+ <para><filename>pam_systemd.so</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>pam_systemd</command> registers user
- sessions in the systemd control group
- hierarchy.</para>
+ sessions with the systemd login manager
+ <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ and hence the systemd control group hierarchy.</para>
<para>On login, this module ensures the following:</para>
an independent session counter is
used.</para></listitem>
- <listitem><para>A new control group
- <filename>/user/$USER/$XDG_SESSION_ID</filename>
- is created and the login process moved into
- it.</para></listitem>
+ <listitem><para>A new systemd scope unit is
+ created for the session. If this is the first
+ concurrent session of the user, an implicit
+ slice below <filename>user.slice</filename> is
+ automatically created and the scope placed in
+ it. In instance of the system service
+ <filename>user@.service</filename> which runs
+ the systemd user manager
+ instance.</para></listitem>
</orderedlist>
<para>On logout, this module ensures the following:</para>
<orderedlist>
- <listitem><para>If
- <varname>$XDG_SESSION_ID</varname> is set and
- <option>kill-session-processes=1</option> specified, all
- remaining processes in the
- <filename>/user/$USER/$XDG_SESSION_ID</filename>
- control group are killed and the control group
- is removed.</para></listitem>
-
- <listitem><para>If last subgroup of the
- <filename>/user/$USER</filename> control group
- was removed the
+ <listitem><para>If this is enabled, all
+ processes of the session are terminated. If
+ the last concurrent session of a user ends, his
+ user systemd instance will be terminated too,
+ and so will the user's slice
+ unit.</para></listitem>
+
+ <listitem><para>If the last concurrent session
+ of a user ends, the
<varname>$XDG_RUNTIME_DIR</varname> directory
- and all its contents are
- removed, too.</para></listitem>
+ and all its contents are removed,
+ too.</para></listitem>
</orderedlist>
<para>If the system was not booted up with systemd as
<para>The following options are understood:</para>
- <variablelist>
- <varlistentry>
- <term><option>kill-session-processes=</option></term>
-
- <listitem><para>Takes a boolean
- argument. If true, all processes
- created by the user during his session
- and from his session will be
- terminated when he logs out from his
- session.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>kill-only-users=</option></term>
-
- <listitem><para>Takes a comma
- separated list of user names or
- numeric user ids as argument. If this
- option is used the effect of the
- <option>kill-session-processes=</option> options
- will apply only to the listed
- users. If this option is not used the
- option applies to all local
- users. Note that
- <option>kill-exclude-users=</option>
- takes precedence over this list and is
- hence subtracted from the list
- specified here.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>kill-exclude-users=</option></term>
-
- <listitem><para>Takes a comma
- separated list of user names or
- numeric user ids as argument. Users
- listed in this argument will not be
- subject to the effect of
- <option>kill-session-processes=</option>. Note
- that that this option takes precedence
- over
- <option>kill-only-users=</option>, and
- hence whatever is listed for
- <option>kill-exclude-users=</option>
- is guaranteed to never be killed by
- this PAM module, independent of any
- other configuration
- setting.</para></listitem>
- </varlistentry>
+ <variablelist class='pam-directives'>
<varlistentry>
- <term><option>controllers=</option></term>
-
- <listitem><para>Takes a comma
- separated list of control group
- controllers in which hierarchies a
- user/session control group will be
- created by default for each user
- logging in, in addition to the control
- group in the named 'name=systemd'
- hierarchy. If omitted, defaults to an
- empty list.</para></listitem>
+ <term><option>class=</option></term>
+
+ <listitem><para>Takes a string
+ argument which sets the session class.
+ The XDG_SESSION_CLASS environmental variable
+ takes precedence. One of
+ <literal>user</literal>,
+ <literal>greeter</literal>,
+ <literal>lock-screen</literal> or
+ <literal>background</literal>. See
+ <citerefentry><refentrytitle>sd_session_get_class</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for details about the session class.</para></listitem>
</varlistentry>
<varlistentry>
- <term><option>reset-controllers=</option></term>
-
- <listitem><para>Takes a comma
- separated list of control group
- controllers in which hierarchies the
- logged in processes will be reset to
- the root control
- group.</para></listitem>
+ <term><option>type=</option></term>
+
+ <listitem><para>Takes a string
+ argument which sets the session type.
+ The XDG_SESSION_TYPE environmental
+ variable takes precedence. One of
+ <literal>unspecified</literal>,
+ <literal>tty</literal>,
+ <literal>x11</literal> or
+ <literal>wayland</literal>. See
+ <citerefentry><refentrytitle>sd_session_get_type</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for details about the session type.</para></listitem>
</varlistentry>
<varlistentry>
- <term><option>debug=</option></term>
+ <term><option>debug<optional>=</optional></option></term>
- <listitem><para>Takes a boolean
- argument. If yes, the module will log
+ <listitem><para>Takes an optional
+ boolean argument. If yes or without
+ the argument, the module will log
debugging information as it
operates.</para></listitem>
</varlistentry>
</variablelist>
-
- <para>Note that setting
- <varname>kill-session-processes=1</varname> will break tools
- like
- <citerefentry><refentrytitle>screen</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
-
- <para>Note that
- <varname>kill-session-processes=1</varname> is a
- stricter version of
- <varname>KillUserProcesses=1</varname> which may be
- configured system-wide in
- <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
- former kills processes of a session as soon as it
- ends, the latter kills processes as soon as the last
- session of the user ends.</para>
-
- <para>If the options are omitted they default to
- <option>kill-session-processes=0</option>,
- <option>kill-only-users=</option>,
- <option>kill-exclude-users=</option>,
- <option>controllers=</option>,
- <option>reset-controllers=</option>,
- <option>debug=no</option>.</para>
</refsect1>
<refsect1>
<para>The following environment variables are set for the processes of the user's session:</para>
- <variablelist>
+ <variablelist class='environment-variables'>
<varlistentry>
<term><varname>$XDG_SESSION_ID</varname></term>
<listitem><para>A session identifier,
- suitable to be used in file names. The
+ suitable to be used in filenames. The
string itself should be considered
opaque, although often it is just the
audit session ID as reported by
in again, the directory contents will
have been lost in between, but
applications should not rely on this
- behaviour and must be able to deal with
+ behavior and must be able to deal with
stale files. To store session-private
- data in this directory the user should
+ data in this directory, the user should
include the value of <varname>$XDG_SESSION_ID</varname>
in the filename. This directory shall
be used for runtime file system
- objects such as AF_UNIX sockets,
+ objects such as <constant>AF_UNIX</constant> sockets,
FIFOs, PID files and similar. It is
guaranteed that this directory is
local and offers the greatest possible
operating system
provides.</para></listitem>
</varlistentry>
+
+ </variablelist>
+
+ <para>The following environment variables are read by
+ the module and may be used by the PAM service to pass
+ metadata to the module:</para>
+
+ <variablelist class='environment-variables'>
+ <varlistentry>
+ <term><varname>$XDG_SESSION_TYPE</varname></term>
+
+ <listitem><para>The session type. This
+ may be used instead of
+ <option>session=</option> on the
+ module parameter line, and is usually
+ preferred.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$XDG_SESSION_CLASS</varname></term>
+
+ <listitem><para>The session class. This
+ may be used instead of
+ <option>class=</option> on the
+ module parameter line, and is usually
+ preferred.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$XDG_SESSION_DESKTOP</varname></term>
+
+ <listitem><para>The session
+ deskop. This may be used to indicate
+ the session desktop used, where this
+ applies. This should be a short,
+ lowercase string identifying the
+ desktop environment used if this
+ information is available. For example:
+ <literal>gnome</literal>, or
+ <literal>kde</literal>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$XDG_SEAT</varname></term>
+
+ <listitem><para>The seat name the session
+ shall be registered for, if
+ any.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$XDG_VTNR</varname></term>
+
+ <listitem><para>The VT number the
+ session shall be registered for, if
+ any. (Only applies to seats with a VT
+ available, such as
+ <literal>seat0</literal>)</para></listitem>
+ </varlistentry>
+
</variablelist>
</refsect1>
password required pam_unix.so
session required pam_unix.so
session required pam_loginuid.so
-session required pam_systemd.so kill-session-processes=1</programlisting>
+session required pam_systemd.so</programlisting>
</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>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pam_loginuid</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff