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
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ 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">
+<refentry id="sd_session_is_active" conditional='HAVE_PAM'>
<refentryinfo>
<title>sd_session_is_active</title>
<refnamediv>
<refname>sd_session_is_active</refname>
+ <refname>sd_session_is_remote</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_desktop</refname>
+ <refname>sd_session_get_display</refname>
+ <refname>sd_session_get_tty</refname>
+ <refname>sd_session_get_vt</refname>
+ <refname>sd_session_get_remote_host</refname>
+ <refname>sd_session_get_remote_user</refname>
<refpurpose>Determine state of a specific session</refpurpose>
</refnamediv>
<funcprototype>
<funcdef>int <function>sd_session_is_active</function></funcdef>
- <paramdef>const char* <parameter>session</parameter></paramdef>
+ <paramdef>const char *<parameter>session</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_session_is_remote</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>
+ <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>
+ <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_desktop</function></funcdef>
+ <paramdef>const char *<parameter>session</parameter></paramdef>
+ <paramdef>char **<parameter>desktop</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_remote_host</function></funcdef>
+ <paramdef>const char *<parameter>session</parameter></paramdef>
+ <paramdef>char **<parameter>remote_host</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_session_get_remote_user</function></funcdef>
+ <paramdef>const char *<parameter>session</parameter></paramdef>
+ <paramdef>char **<parameter>remote_user</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>
+
+ <funcprototype>
+ <funcdef>int <function>sd_session_get_vt</function></funcdef>
+ <paramdef>const char *<parameter>session</parameter></paramdef>
+ <paramdef>unsigned int *<parameter>vt</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
(i.e. currently in the foreground and available for
user input) or not.</para>
+ <para><function>sd_session_is_remote()</function> may
+ be used to determine whether the session identified by
+ the specified session identifier is a remote session
+ (i.e. its remote host is known) 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 project='man-pages'><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
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>
+ <citerefentry project='man-pages'><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 project='man-pages'><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>wayland</literal>, <literal>tty</literal>,
+ <literal>mir</literal> or <literal>unspecified</literal> and
+ 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_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>,
+ <literal>lock-screen</literal>, or
+ <literal>background</literal> and 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_session_get_desktop()</function> may
+ be used to determine the brand of the desktop running on
+ the session identified by the specified session identifier.
+ This field can be set freely by desktop environments and
+ does not follow any special formatting. However, desktops
+ are strongly recommended to use the same identifiers and
+ capitalization as for
+ <varname>$XDG_CURRENT_DESKTOP</varname>, as defined by
+ the <ulink
+ url="http://standards.freedesktop.org/desktop-entry-spec/latest/">Desktop
+ Entry
+ Specification</ulink>. 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_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 project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ call after use.</para>
+
+ <para><function>sd_session_get_remote_host()</function>
+ may be used to determine the remote hostname of the
+ session identified by the specified session
+ identifier. 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_session_get_remote_user()</function>
+ may be used to determine the remote username of the
+ session identified by the specified session
+ identifier. The returned string needs to be
+ freed with the libc
+ <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ call after use. Note that this value is rarely known
+ to the system, and even then should not be relied on.</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 project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ call after use.</para>
+
+ <para><function>sd_session_get_vt()</function>
+ may be used to determine the VT number of the
+ session identified by the specified session
+ identifier. This function will return an error if
+ the seat does not support VTs.</para>
+
+ <para>If the <varname>session</varname> parameter of
+ any of these functions is passed as
+ <constant>NULL</constant>, 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_uid()</function> and
- <function>sd_session_get_seat()</function> return 0 or
+ <para>If the test succeeds,
+ <function>sd_session_is_active()</function> and
+ <function>sd_session_is_remote()</function> return 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>,
+ <function>sd_session_get_remote_user()</function>,
+ <function>sd_session_get_remote_host()</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>
<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>
+ <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>,
+ <function>sd_session_get_remote_host()</function>,
+ <function>sd_session_get_remote_user()</function> and
+ <function>sd_session_get_tty()</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>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_pid_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff