Adding upstream version 252.22.upstream/252.22

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 191 insertions, 0 deletions

diff --git a/man/sd_uid_get_state.xml b/man/sd_uid_get_state.xml
new file mode 100644
index 0000000..087a2d5
--- /dev/null
+++ b/man/sd_uid_get_state.xml
@@ -0,0 +1,191 @@
+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+
+<refentry id="sd_uid_get_state" conditional='HAVE_PAM'
+          xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>sd_uid_get_state</title>
+    <productname>systemd</productname>
+  </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>
+    <refname>sd_uid_get_display</refname>
+    <refpurpose>Determine login state of a specific Unix user ID</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcsynopsisinfo>#include &lt;systemd/sd-login.h&gt;</funcsynopsisinfo>
+
+      <funcprototype>
+        <funcdef>int <function>sd_uid_get_state</function></funcdef>
+        <paramdef>uid_t <parameter>uid</parameter></paramdef>
+        <paramdef>char **<parameter>state</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_uid_is_on_seat</function></funcdef>
+        <paramdef>uid_t <parameter>uid</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>uid</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>uid</parameter></paramdef>
+        <paramdef>int <parameter>require_active</parameter></paramdef>
+        <paramdef>char ***<parameter>seats</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_uid_get_display</function></funcdef>
+        <paramdef>uid_t <parameter>uid</parameter></paramdef>
+        <paramdef>char **<parameter>session</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, i.e.
+    has no session in the foreground), <literal>active</literal> (user
+    logged in, and has at least one active session, i.e. one session
+    in the foreground), <literal>closing</literal> (user not logged
+    in, and not lingering, but some processes 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. The returned string needs to be freed with the
+    libc
+    <citerefentry project='man-pages'><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
+    value. 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. Accepts a
+    Unix user identifier as parameter. The
+    <parameter>require_active</parameter> parameter controls whether
+    the returned list shall consist of only those sessions where the
+    user is currently active (&gt; 0), where the user is currently
+    online but possibly inactive (= 0), or logged in but
+    possibly closing the session (&lt; 0). The call returns a
+    <constant>NULL</constant> terminated string array of session
+    identifiers in <parameter>sessions</parameter> which needs to be
+    freed by the caller with the libc
+    <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    call after use, including all the strings referenced. If the
+    string array parameter is passed as <constant>NULL</constant>, the
+    array will not be filled in, but the return code still indicates
+    the number of current sessions. 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_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>
+
+    <para><function>sd_uid_get_display()</function> returns the name
+    of the "primary" session of a user. If the user has graphical
+    sessions, it will be the oldest graphical session. Otherwise, it
+    will be the oldest open session.</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. <function>sd_uid_get_display()</function> returns a non-negative code
+    on success. On failure, these calls return a negative errno-style error code.</para>
+
+    <refsect2>
+      <title>Errors</title>
+
+      <para>Returned errors may indicate the following problems:</para>
+
+      <variablelist>
+
+        <varlistentry>
+          <term><constant>-ENODATA</constant></term>
+
+          <listitem><para>The given field is not specified for the described user.</para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><constant>-ENXIO</constant></term>
+
+          <listitem><para>The specified seat is unknown.</para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><constant>-EINVAL</constant></term>
+
+          <listitem><para>An input parameter was invalid (out of range, or <constant>NULL</constant>,
+          where that is not accepted). This is also returned if the passed user ID is
+          <constant>0xFFFF</constant> or <constant>0xFFFFFFFF</constant>, which are undefined on Linux.
+          </para></listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><constant>-ENOMEM</constant></term>
+
+          <listitem><para>Memory allocation failed.</para></listitem>
+        </varlistentry>
+      </variablelist>
+    </refsect2>
+  </refsect1>
+
+  <xi:include href="libsystemd-pkgconfig.xml" />
+
+  <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_owner_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>