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Diffstat (limited to 'src/libsystemd/sd_get_seats.xml')
| -rw-r--r-- | src/libsystemd/sd_get_seats.xml | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/libsystemd/sd_get_seats.xml b/src/libsystemd/sd_get_seats.xml new file mode 100644 index 0000000000..37eb3fc894 --- /dev/null +++ b/src/libsystemd/sd_get_seats.xml @@ -0,0 +1,164 @@ +<?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_get_seats" conditional='HAVE_PAM'> + + <refentryinfo> + <title>sd_get_seats</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_get_seats</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_get_seats</refname> + <refname>sd_get_sessions</refname> + <refname>sd_get_uids</refname> + <refname>sd_get_machine_names</refname> + <refpurpose>Determine available seats, sessions, logged in users and virtual machines/containers</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_get_seats</function></funcdef> + <paramdef>char ***<parameter>seats</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_get_sessions</function></funcdef> + <paramdef>char ***<parameter>sessions</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_get_uids</function></funcdef> + <paramdef>uid_t **<parameter>users</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_get_machine_names</function></funcdef> + <paramdef>char ***<parameter>machines</parameter></paramdef> + </funcprototype> + + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_get_seats()</function> may be used to determine + all currently available local seats. Returns a + <constant>NULL</constant> terminated array of seat identifiers. + The returned array and all strings it references need to be freed + with the libc + <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> + call after use. Note that instead of an empty array + <constant>NULL</constant> may be returned and should be considered + equivalent to an empty array.</para> + + <para>Similarly, <function>sd_get_sessions()</function> may be + used to determine all current login sessions.</para> + + <para>Similarly, <function>sd_get_uids()</function> may be used to + determine all Unix users who currently have login sessions.</para> + + <para>Similarly, <function>sd_get_machine_names()</function> may + be used to determine all current virtual machines and containers + on the system.</para> + + <para>Note that the returned lists are not sorted and in an + undefined order.</para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para>On success, <function>sd_get_seats()</function>, + <function>sd_get_sessions()</function>, + <function>sd_get_uids()</function> and + <function>sd_get_machine_names()</function> return the number of + entries in the arrays. On failure, these calls return a negative + errno-style error code.</para> + </refsect1> + + + <refsect1> + <title>Errors</title> + + <para>Returned errors may indicate the following problems:</para> + + <variablelist> + + <varlistentry> + <term><constant>-EINVAL</constant></term> + + <listitem><para>An input parameter was invalid (out of range, + or NULL, where that is not accepted).</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ENOMEM</constant></term> + + <listitem><para>Memory allocation failed.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Notes</title> + + <para>The <function>sd_get_seats()</function>, + <function>sd_get_sessions()</function>, + <function>sd_get_uids()</function> and + <function>sd_get_machine_names()</function> interfaces are + available as a shared library, which can be compiled and linked to + with the + <constant>libsystemd</constant> <citerefentry project='die-net'><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_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |