man: document the sd-login interfaces
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd_get_seats">
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<refentryinfo>
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<title>sd_get_seats</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_get_seats</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_get_seats</refname>
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<refname>sd_get_sessions</refname>
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<refname>sd_get_uids</refname>
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<refpurpose>Determine available seats, sessions and logged in users</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_get_seats</function></funcdef>
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<paramdef>char*** <parameter>seats</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_get_sessions</function></funcdef>
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<paramdef>char*** <parameter>sessions</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_get_uids</function></funcdef>
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<paramdef>char*** <parameter>sessions</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_get_seats()</function> may be used
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to determine all currently available local
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seats. Returns an array of seat identifiers. The
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returned array and all strings it references need to
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be freed with the libc
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<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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call after use.</para>
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<para>Similar, <function>sd_get_sessions()</function> may
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be used to determine all current login sessions.</para>
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<para>Similar, <function>sd_get_uids()</function> may
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be used to determine all Unix users who currently have login sessions.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>On success <function>sd_get_seats()</function>,
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<function>sd_get_sessions()</function> and
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<function>sd_get_uids()</function> return the number
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of entries in the arrays. On failure, these calls
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return a negative errno-style error code.</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>The <function>sd_get_seats()</function>,
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<function>sd_get_sessions()</function> and
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<function>sd_get_uids()</function> interfaces
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are available as shared library, which can be compiled
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and linked to with the
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<literal>libsystemd-login</literal>
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<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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file.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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|
under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
|
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|
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|
systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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|
General Public License for more details.
|
||||||
|
|
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|
You should have received a copy of the GNU General Public License
|
||||||
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd_login_monitor_new">
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<refentryinfo>
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<title>sd_login_monitor_new</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_login_monitor_new</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_login_monitor_new</refname>
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<refname>sd_login_monitor_unref</refname>
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<refname>sd_login_monitor_flush</refname>
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<refname>sd_login_monitor_get_fd</refname>
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<refpurpose>Monitor login sessions, seats and users</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_login_monitor_new</function></funcdef>
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<paramdef>const char* <parameter>category</parameter></paramdef>
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<paramdef>sd_login_monitor** <parameter>ret</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>sd_login_monitor* <function>sd_login_monitor_unref</function></funcdef>
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<paramdef>sd_login_monitor* <parameter>m</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_login_monitor_flush</function></funcdef>
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<paramdef>sd_login_monitor* <parameter>m</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_login_monitor_get_fd</function></funcdef>
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<paramdef>sd_login_monitor* <parameter>m</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_login_monitor_new()</function> may
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be used to monitor login session, users and seats. Via
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a monitor object a file descriptor can be integrated
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into an application defined event loop which is woken
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up each time a user logs in, logs out or a seat is
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added or removed, or a session, user, or seat changes
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state otherwise. The first parameter takes a string
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which can be either <literal>seat</literal> (to get
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only notifications about seats being added, removed or
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changed), <literal>session</literal> (to get only
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notifications about sessions being created or removed
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or changed) or <literal>uid</literal> (to get only
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notifications when a user changes state in respect to
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logins). If notifications shall be generated in all
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these conditions, NULL may be passed. Note that in
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future additional categories may be defined. The
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second parameter returns a monitor object and needs to
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be freed with the
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<function>sd_login_monitor_unref()</function> call
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after use.</para>
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<para><function>sd_login_monitor_unref()</function>
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may be used to destroy a monitor object. Note that
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this will invalidate any file descriptor returned by
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<function>sd_login_monitor_get_fd()</function>.</para>
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<para><function>sd_login_monitor_flush()</function>
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may be used to reset the wakeup state of the monitor
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object. Whenever an event causes the monitor to wake
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up the event loop via the file descriptor this
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function needs to be called to reset the wake-up
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state. If this call is not invoked the file descriptor
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will immediately wake up the event loop again.</para>
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<para><function>sd_login_monitor_get_fd()</function>
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may be used to retrieve the file descriptor of the
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monitor object that may be integrated in an
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application defined event loop, based around
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<citerefentry><refentrytitle>poll</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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or a similar interface. The application should include
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the returned file descriptor as wake up source for
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POLLIN events. Whenever a wake-up is triggered the
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file descriptor needs to be reset via
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<function>sd_login_monitor_flush()</function>. An
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application needs to reread the login state with a
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function like
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<citerefentry><refentrytitle>sd_get_seats</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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or similar to determine what changed.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>On success
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<function>sd_login_monitor_new()</function> and
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<function>sd_login_monitor_flush()</function> return 0
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or a positive integer. On success
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<function>sd_login_monitor_get_fd()</function> returns
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a Unix file descriptor. On failure, these calls return
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a negative errno-style error code.</para>
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<para><function>sd_login_monitor_unref()</function>
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always returns NULL.</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>The <function>sd_login_monitor_new()</function>,
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<function>sd_login_monitor_unref()</function>, <function>sd_login_monitor_flush()</function> and
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<function>sd_login_monitor_get_fd()</function> interfaces
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are available as shared library, which can be compiled
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and linked to with the
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<literal>libsystemd-login</literal>
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<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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file.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_get_seats</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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@ -0,0 +1,136 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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|
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|
Copyright 2010 Lennart Poettering
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|
|
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|
systemd is free software; you can redistribute it and/or modify it
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|
under the terms of the GNU General Public License as published by
|
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|
the Free Software Foundation; either version 2 of the License, or
|
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|
(at your option) any later version.
|
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|
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|
systemd is distributed in the hope that it will be useful, but
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|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
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|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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|
General Public License for more details.
|
||||||
|
|
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|
You should have received a copy of the GNU General Public License
|
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|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd_pid_get_session">
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<refentryinfo>
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<title>sd_pid_get_session</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_pid_get_session</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_pid_get_session</refname>
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<refname>sd_pid_get_owner_uid</refname>
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<refpurpose>Determine session or owner of a session of a specific PID</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_pid_get_session</function></funcdef>
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<paramdef>pid_t <parameter>pid</parameter></paramdef>
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<paramdef>char** <parameter>session</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_pid_get_owner_uid</function></funcdef>
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<paramdef>pid_t <parameter>pid</parameter></paramdef>
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<paramdef>uid_t* <parameter>uid</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_pid_get_session()</function> may be
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used to determine the login session identifier of a
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process identified by the specified process identifier. The session
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identifier is a short string (up to 64 characters),
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consisting only of the characters a-zA-Z0-9 as well as
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||||||
|
'-' and '_'. It is suitable for usage in file system
|
||||||
|
paths. Note that not all processes are part of a login
|
||||||
|
session (e.g. system service processes and user
|
||||||
|
processes that are shared between multiple sessions of
|
||||||
|
the same user). For processes not being part of a
|
||||||
|
login session this function will fail. 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_pid_get_owner_uid()</function> may
|
||||||
|
be used to determine the Unix user identifier of the
|
||||||
|
owner of the session of a process identified the
|
||||||
|
specified PID. Note that this function will succeed
|
||||||
|
for user processes which are shared between multiple
|
||||||
|
login sessions of the same user, where
|
||||||
|
<function>sd_pid_get_session()</function> will
|
||||||
|
fail. For processes not being part of a login session
|
||||||
|
and not being a shared process of a user this function
|
||||||
|
will fail.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Return Value</title>
|
||||||
|
|
||||||
|
<para>On success these calls 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_pid_get_session()</function>
|
||||||
|
and <function>sd_pid_get_owner_uid()</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>
|
||||||
|
|
||||||
|
<para>Note that the login session identifier as
|
||||||
|
returned by <function>sd_pid_get_session()</function>
|
||||||
|
is completely unrelated to the process session
|
||||||
|
identifier as returned by
|
||||||
|
<citerefentry><refentrytitle>getsid</refentrytitle><manvolnum>2</manvolnum></citerefentry>.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>See Also</title>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd_session_is_active</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>getsid</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
|
@ -0,0 +1,150 @@
|
||||||
|
<?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 General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 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.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
-->
|
||||||
|
|
||||||
|
<refentry id="sd_seat_get_active">
|
||||||
|
|
||||||
|
<refentryinfo>
|
||||||
|
<title>sd_seat_get_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_seat_get_active</refentrytitle>
|
||||||
|
<manvolnum>3</manvolnum>
|
||||||
|
</refmeta>
|
||||||
|
|
||||||
|
<refnamediv>
|
||||||
|
<refname>sd_seat_get_active</refname>
|
||||||
|
<refname>sd_seat_get_sessions</refname>
|
||||||
|
<refname>sd_seat_can_multi_session</refname>
|
||||||
|
<refpurpose>Determine state of a specific seat</refpurpose>
|
||||||
|
</refnamediv>
|
||||||
|
|
||||||
|
<refsynopsisdiv>
|
||||||
|
<funcsynopsis>
|
||||||
|
<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_seat_get_active</function></funcdef>
|
||||||
|
<paramdef>const char* <parameter>seat</parameter></paramdef>
|
||||||
|
<paramdef>char** <parameter>session</parameter></paramdef>
|
||||||
|
<paramdef>uid_t* <parameter>uid</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_seat_get_sessions</function></funcdef>
|
||||||
|
<paramdef>const char* <parameter>seat</parameter></paramdef>
|
||||||
|
<paramdef>char*** <parameter>sessions</parameter></paramdef>
|
||||||
|
<paramdef>uid_t** <parameter>uid</parameter></paramdef>
|
||||||
|
<paramdef>unsigned* <parameter>n_uids</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_seat_can_multi_session</function></funcdef>
|
||||||
|
<paramdef>const char* <parameter>session</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
</funcsynopsis>
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para><function>sd_seat_get_active()</function> may be
|
||||||
|
used to determine which session is currently active on
|
||||||
|
a seat, if there is any. Returns the session
|
||||||
|
identifier and the user identifier of the Unix user
|
||||||
|
the session is belonging to. Either the session or the
|
||||||
|
user identifier parameter can be be passed NULL, in
|
||||||
|
case only one of the parameters shall be queried. 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_seat_get_sessions()</function> may
|
||||||
|
be used to determine all sessions on the specified
|
||||||
|
seat. Returns two arrays, one (NULL terminated) with
|
||||||
|
the session identifiers of the sessions and one with
|
||||||
|
the user identifiers of the Unix users the sessions
|
||||||
|
belong to. An additional parameter may be used to
|
||||||
|
return the number of entries in the latter array. The
|
||||||
|
two arrays and the latter parameter may be passed as
|
||||||
|
NULL in case these values need not to be
|
||||||
|
determined. The arrays and the strings referenced by
|
||||||
|
them need to be freed with the libc
|
||||||
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||||
|
call after use.</para>
|
||||||
|
|
||||||
|
<para><function>sd_seat_can_multi_session()</function>
|
||||||
|
may be used to determine whether a specific seat is
|
||||||
|
capable of multi-session, i.e. allows multiple login
|
||||||
|
sessions in parallel (whith only one being active at a
|
||||||
|
time).</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Return Value</title>
|
||||||
|
|
||||||
|
<para> On success
|
||||||
|
<function>sd_seat_get_active()</function> return
|
||||||
|
return 0 or a positive integer. On success
|
||||||
|
<function>sd_seat_get_sessions()</function> returns
|
||||||
|
the number of entries in the session identifier
|
||||||
|
array. If the test succeeds
|
||||||
|
<function>sd_seat_can_multi_session</function> returns
|
||||||
|
a positive integer, if it fails 0. On failure, these
|
||||||
|
calls return a negative errno-style error code.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Notes</title>
|
||||||
|
|
||||||
|
<para>The <function>sd_seat_get_active()</function>,
|
||||||
|
<function>sd_seat_get_sessions()</function>, and
|
||||||
|
<function>sd_seat_can_multi_session()</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>7</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
|
@ -0,0 +1,134 @@
|
||||||
|
<?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 General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 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.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
-->
|
||||||
|
|
||||||
|
<refentry id="sd_session_is_active">
|
||||||
|
|
||||||
|
<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_uid</refname>
|
||||||
|
<refname>sd_session_get_seat</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_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>
|
||||||
|
</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_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>
|
||||||
|
</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_uid()</function> and
|
||||||
|
<function>sd_session_get_seat()</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_uid()</function>, and
|
||||||
|
<function>sd_session_get_seat()</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>7</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd_pid_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
|
@ -0,0 +1,182 @@
|
||||||
|
<?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 General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 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.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
-->
|
||||||
|
|
||||||
|
<refentry id="sd_uid_get_state">
|
||||||
|
|
||||||
|
<refentryinfo>
|
||||||
|
<title>sd_uid_get_state</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_uid_get_state</refentrytitle>
|
||||||
|
<manvolnum>3</manvolnum>
|
||||||
|
</refmeta>
|
||||||
|
|
||||||
|
<refnamediv>
|
||||||
|
<refname>sd_uid_get_state</refname>
|
||||||
|
<refname>sd_uid_is_on_seat</refname>
|
||||||
|
<refname>sd_uid_get_sessions</refname>
|
||||||
|
<refname>sd_uid_get_seats</refname>
|
||||||
|
<refpurpose>Determine login state of a specific Unix user ID</refpurpose>
|
||||||
|
</refnamediv>
|
||||||
|
|
||||||
|
<refsynopsisdiv>
|
||||||
|
<funcsynopsis>
|
||||||
|
<funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_uid_get_state</function></funcdef>
|
||||||
|
<paramdef>uid_t <parameter>pid</parameter></paramdef>
|
||||||
|
<paramdef>char** <parameter>state</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_uid_is_on_seat</function></funcdef>
|
||||||
|
<paramdef>uid_t <parameter>pid</parameter></paramdef>
|
||||||
|
<paramdef>int <parameter>require_active</parameter></paramdef>
|
||||||
|
<paramdef>const char* <parameter>seat</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_uid_get_sessions</function></funcdef>
|
||||||
|
<paramdef>uid_t <parameter>pid</parameter></paramdef>
|
||||||
|
<paramdef>int <parameter>require_active</parameter></paramdef>
|
||||||
|
<paramdef>char*** <parameter>sessions</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_uid_get_seats</function></funcdef>
|
||||||
|
<paramdef>uid_t <parameter>pid</parameter></paramdef>
|
||||||
|
<paramdef>int <parameter>require_active</parameter></paramdef>
|
||||||
|
<paramdef>char*** <parameter>seats</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
</funcsynopsis>
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para><function>sd_uid_get_state()</function> may be
|
||||||
|
used to determine the login state of a specific Unix
|
||||||
|
user identifier. The following states are currently
|
||||||
|
known: <literal>offline</literal> (user not logged in
|
||||||
|
at all), <literal>lingering</literal> (user not logged
|
||||||
|
in, but some user services running),
|
||||||
|
<literal>online</literal> (user logged in, but not
|
||||||
|
active), <literal>active</literal> (user logged in on
|
||||||
|
an active seat). In the future additional states might
|
||||||
|
be defined, client code should be written to be robust
|
||||||
|
in regards to additional state strings being
|
||||||
|
returned. 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_uid_is_on_seat()</function> may be
|
||||||
|
used to determine whether a specific user is logged in
|
||||||
|
or active on a specific seat. Accepts a Unix user
|
||||||
|
identifier and a seat identifier string as
|
||||||
|
parameters. The <parameter>require_active</parameter>
|
||||||
|
parameter is a boolean. If non-zero (true) this
|
||||||
|
function will test if the user is active (i.e. has a
|
||||||
|
session that is in the foreground and accepting user
|
||||||
|
input) on the specified seat, otherwise (false) only
|
||||||
|
if the user is logged in (and possibly inactive) on
|
||||||
|
the specified seat.</para>
|
||||||
|
|
||||||
|
<para><function>sd_uid_get_sessions()</function> may
|
||||||
|
be used to determine the current sessions of the
|
||||||
|
specified user. Acceptes a Unix user identifier as
|
||||||
|
parameter. The <parameter>require_active</parameter>
|
||||||
|
boolean parameter controls whether the returned list
|
||||||
|
shall consist of only those sessions where the user is
|
||||||
|
currently active (true) or where the user is currently
|
||||||
|
logged in at all, possibly inactive (false). The call
|
||||||
|
returns a NULL terminated string array of session
|
||||||
|
identifiers in <parameter>sessions</parameter> which
|
||||||
|
needs to be freed by the caller with the libc
|
||||||
|
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||||
|
call after use, including all the strings referenced. If
|
||||||
|
the string array parameter is passed as NULL the array
|
||||||
|
will not be filled in, but the return code still
|
||||||
|
indicates the number of current sessions.</para>
|
||||||
|
|
||||||
|
<para>Similar, <function>sd_uid_get_seats()</function>
|
||||||
|
may be used to determine the list of seats on which
|
||||||
|
the user currently has sessions. Similar semantics
|
||||||
|
apply, however note that the user may have
|
||||||
|
multiple sessions on the same seat as well as sessions
|
||||||
|
with no attached seat and hence the number of entries
|
||||||
|
in the returned array may differ from the one returned
|
||||||
|
by <function>sd_uid_get_sessions()</function>.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Return Value</title>
|
||||||
|
|
||||||
|
<para>On success
|
||||||
|
<function>sd_uid_get_state()</function> returns 0 or a
|
||||||
|
positive integer. If the test succeeds
|
||||||
|
<function>sd_uid_is_on_seat()</function> returns a
|
||||||
|
positive integer, if it fails
|
||||||
|
0. <function>sd_uid_get_sessions()</function> and
|
||||||
|
<function>sd_uid_get_seats()</function> return the
|
||||||
|
number of entries in the returned arrays. On failure,
|
||||||
|
these calls return a negative errno-style error
|
||||||
|
code.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Notes</title>
|
||||||
|
|
||||||
|
<para>The <function>sd_uid_get_state()</function>,
|
||||||
|
<function>sd_uid_is_on_seat()</function>,
|
||||||
|
<function>sd_uid_get_sessions()</function>, and
|
||||||
|
<function>sd_uid_get_seats()</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>7</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd_pid_get_owner_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
Loading…
Reference in New Issue