Re-add logind man pages from upstream systemd

1 files changed, 261 insertions, 0 deletions

diff --git a/man/sd_pid_get_session.xml b/man/sd_pid_get_session.xml
new file mode 100644
index 0000000000..f708d0d5e1
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+++ b/man/sd_pid_get_session.xml
@@ -0,0 +1,261 @@
+<?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_pid_get_session" conditional='HAVE_PAM'>
+
+  <refentryinfo>
+    <title>sd_pid_get_session</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_pid_get_session</refentrytitle>
+    <manvolnum>3</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>sd_pid_get_session</refname>
+    <refname>sd_pid_get_unit</refname>
+    <refname>sd_pid_get_user_unit</refname>
+    <refname>sd_pid_get_owner_uid</refname>
+    <refname>sd_pid_get_machine_name</refname>
+    <refname>sd_pid_get_slice</refname>
+    <refname>sd_peer_get_session</refname>
+    <refname>sd_peer_get_unit</refname>
+    <refname>sd_peer_get_user_unit</refname>
+    <refname>sd_peer_get_owner_uid</refname>
+    <refname>sd_peer_get_machine_name</refname>
+    <refname>sd_peer_get_slice</refname>
+    <refpurpose>Determine session, service, owner of a
+    session, container/VM or slice of a specific
+    PID or socket peer</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcsynopsisinfo>#include &lt;systemd/sd-login.h&gt;</funcsynopsisinfo>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_session</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>char **<parameter>session</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_unit</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>char **<parameter>unit</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_user_unit</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>char **<parameter>unit</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_owner_uid</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>uid_t *<parameter>uid</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_machine_name</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>char **<parameter>name</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_pid_get_slice</function></funcdef>
+        <paramdef>pid_t <parameter>pid</parameter></paramdef>
+        <paramdef>char **<parameter>slice</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_session</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>char **<parameter>session</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_unit</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>char **<parameter>unit</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_user_unit</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>char **<parameter>unit</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_owner_uid</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>uid_t *<parameter>uid</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_machine_name</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>char **<parameter>name</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_peer_get_slice</function></funcdef>
+        <paramdef>int <parameter>fd</parameter></paramdef>
+        <paramdef>char **<parameter>slice</parameter></paramdef>
+      </funcprototype>
+    </funcsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><function>sd_pid_get_session()</function> may be used to
+    determine the login session identifier of a process identified by
+    the specified process identifier. The session identifier is a
+    short string, suitable for usage in file system paths. Note that
+    not all processes are part of a login session (e.g. system service
+    processes, user processes that are shared between multiple
+    sessions of the same user, or kernel threads). For processes not
+    being part of a login session this function will fail. 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_pid_get_unit()</function> may be used to
+    determine the systemd system unit (i.e. system service) identifier
+    of a process identified by the specified PID. The unit name is a
+    short string, suitable for usage in file system paths. Note that
+    not all processes are part of a system unit/service (e.g. user
+    processes, or kernel threads). For processes not being part of a
+    systemd system unit this function will fail. (More specifically:
+    this call will not work for processes that are part of user units,
+    use <function>sd_pid_get_user_unit()</function> for that.) 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_pid_get_user_unit()</function> may be used to
+    determine the systemd user unit (i.e. user service) identifier of
+    a process identified by the specified PID. This is similar to
+    <function>sd_pid_get_unit()</function> but applies to user units
+    instead of system units.</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>
+
+    <para><function>sd_pid_get_machine_name()</function> may be used
+    to determine the name of the VM or container is a member of. The
+    machine name is a short string, suitable for usage in file system
+    paths. 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_pid_get_slice()</function> may be used to
+    determine the slice unit the process is a member of. See
+    <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+    for details about slices. 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>If the <varname>pid</varname> parameter of any of these
+    functions is passed as 0, the operation is executed for the
+    calling process.</para>
+
+    <para>The <function>sd_peer_get_session()</function>,
+    <function>sd_peer_get_unit()</function>,
+    <function>sd_peer_get_user_unit()</function>,
+    <function>sd_peer_get_owner_uid()</function>,
+    <function>sd_peer_get_machine_name()</function> and
+    <function>sd_peer_get_slice()</function> calls operate similar to
+    their PID counterparts, but operate on a connected AF_UNIX socket
+    and retrieve information about the connected peer process.</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>,
+    <function>sd_pid_get_unit()</function>,
+    <function>sd_pid_get_user_unit()</function>,
+    <function>sd_pid_get_owner_uid()</function>,
+    <function>sd_pid_get_machine_name()</function>,
+    <function>sd_pid_get_slice()</function>,
+    <function>sd_peer_get_session()</function>,
+    <function>sd_peer_get_unit()</function>,
+    <function>sd_peer_get_user_unit()</function>,
+    <function>sd_peer_get_owner_uid()</function>,
+    <function>sd_peer_get_machine_name()</function> and
+    <function>sd_peer_get_slice()</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>
+
+    <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>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_session_is_active</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>getsid</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>