mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-10-31 07:51:08 +03:00
56ba3c78ae
man rules were repeating the same information in too many places, which was error prone. Those rules can be easily generated from .xml files. For efficiency and because python is not a required dependency, Makefile-man.am is only regenerated when requested with make update-man-list If no metadata in man/*.xml changed, this file should not change. So only when a new man page or a new alias is added, this file should show up in 'git diff'. The change should then be committed. If the support for building from git without python was dropped, we could drop Makefile-man.am from version control. This would also increase the partial build time (since more stuff would be rebuild whenever sources in man/*.xml would be modified), so it would probably wouldn't be worth it.
258 lines
13 KiB
XML
258 lines
13 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!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="sd_session_is_active" conditional='HAVE_PAM'>
|
|
|
|
<refentryinfo>
|
|
<title>sd_session_is_active</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>sd_session_is_active</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_session_is_active</refname>
|
|
<refname>sd_session_get_state</refname>
|
|
<refname>sd_session_get_uid</refname>
|
|
<refname>sd_session_get_seat</refname>
|
|
<refname>sd_session_get_service</refname>
|
|
<refname>sd_session_get_type</refname>
|
|
<refname>sd_session_get_class</refname>
|
|
<refname>sd_session_get_display</refname>
|
|
<refname>sd_session_get_tty</refname>
|
|
<refpurpose>Determine state of a specific session</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_is_active</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_state</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>state</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_uid</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>uid_t* <parameter>uid</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_seat</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>seat</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_service</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>service</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_type</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>type</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_class</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>class</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_display</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>display</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_session_get_tty</function></funcdef>
|
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
|
<paramdef>char** <parameter>tty</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><function>sd_session_is_active()</function> may
|
|
be used to determine whether the session identified by
|
|
the specified session identifier is currently active
|
|
(i.e. currently in the foreground and available for
|
|
user input) or not.</para>
|
|
|
|
<para><function>sd_session_get_state()</function> may
|
|
be used to determine the state of the session
|
|
identified by the specified session identifier. The
|
|
following states are currently known:
|
|
<literal>online</literal> (session logged in, but
|
|
session not active, i.e. not in the foreground),
|
|
<literal>active</literal> (session logged in and
|
|
active, i.e. in the foreground),
|
|
<literal>closing</literal> (session nominally logged
|
|
out, but some processes belonging to it are still
|
|
around). In the future additional states might be
|
|
defined, client code should be written to be robust in
|
|
regards to additional state strings being
|
|
returned. This function is a more generic version of
|
|
<function>sd_session_is_active()</function>. The returned
|
|
string needs to be freed with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_uid()</function> may be
|
|
used to determine the user identifier of the Unix user the session
|
|
identified by the specified session identifier belongs
|
|
to.</para>
|
|
|
|
<para><function>sd_session_get_seat()</function> may
|
|
be used to determine the seat identifier of the seat
|
|
the session identified by the specified session
|
|
identifier belongs to. Note that not all sessions are
|
|
attached to a seat, this call will fail for them. The
|
|
returned string needs to be freed with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_service()</function>
|
|
may be used to determine the name of the service (as
|
|
passed during PAM session setup) that registered the
|
|
session identified by the specified session
|
|
identifier. The returned string needs to be freed with
|
|
the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_type()</function> may
|
|
be used to determine the type of the session
|
|
identified by the specified session identifier. The
|
|
returned string is one of <literal>x11</literal>,
|
|
<literal>tty</literal> or
|
|
<literal>unspecified</literal> and needs to be freed
|
|
with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_class()</function> may
|
|
be used to determine the class of the session
|
|
identified by the specified session identifier. The
|
|
returned string is one of <literal>user</literal>,
|
|
<literal>greeter</literal> or
|
|
<literal>lock-screen</literal> and needs to be freed
|
|
with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_display()</function>
|
|
may be used to determine the X11 display of the
|
|
session identified by the specified session
|
|
identifier. The returned string needs to be
|
|
freed with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para><function>sd_session_get_tty()</function>
|
|
may be used to determine the TTY device of the
|
|
session identified by the specified session
|
|
identifier. The returned string needs to be
|
|
freed with the libc
|
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call after use.</para>
|
|
|
|
<para>If the <literal>session</literal> parameter of
|
|
any of these functions is passed as NULL the operation
|
|
is executed for the session the calling process is a
|
|
member of, if there is any.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para>If the test succeeds
|
|
<function>sd_session_is_active()</function> returns a
|
|
positive integer, if it fails 0. On success
|
|
<function>sd_session_get_state()</function>,
|
|
<function>sd_session_get_uid()</function>,
|
|
<function>sd_session_get_seat()</function>,
|
|
<function>sd_session_get_service()</function>,
|
|
<function>sd_session_get_type()</function>,
|
|
<function>sd_session_get_class()</function>,
|
|
<function>sd_session_get_display()</function> and
|
|
<function>sd_session_get_tty()</function> return 0 or
|
|
a positive integer. On failure, these calls return a
|
|
negative errno-style error code.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Notes</title>
|
|
|
|
<para>The <function>sd_session_is_active()</function>,
|
|
<function>sd_session_get_state()</function>,
|
|
<function>sd_session_get_uid()</function>,
|
|
<function>sd_session_get_seat()</function>,
|
|
<function>sd_session_get_service()</function>,
|
|
<function>sd_session_get_type()</function>,
|
|
<function>sd_session_get_class()</function>,
|
|
<function>sd_session_get_display()</function> and
|
|
<function>sd_session_get_tty()</function>
|
|
interfaces are available as shared library, which can
|
|
be compiled and linked to with the
|
|
<literal>libsystemd-login</literal>
|
|
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
file.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_pid_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|