]>
Commit | Line | Data |
---|---|---|
0b3b020a LP |
1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | ||
5 | <!-- | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
0b3b020a LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
0b3b020a | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
0b3b020a LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | --> | |
23 | ||
56ba3c78 | 24 | <refentry id="sd_uid_get_state" conditional='HAVE_PAM'> |
0b3b020a LP |
25 | |
26 | <refentryinfo> | |
27 | <title>sd_uid_get_state</title> | |
28 | <productname>systemd</productname> | |
29 | ||
30 | <authorgroup> | |
31 | <author> | |
32 | <contrib>Developer</contrib> | |
33 | <firstname>Lennart</firstname> | |
34 | <surname>Poettering</surname> | |
35 | <email>lennart@poettering.net</email> | |
36 | </author> | |
37 | </authorgroup> | |
38 | </refentryinfo> | |
39 | ||
40 | <refmeta> | |
41 | <refentrytitle>sd_uid_get_state</refentrytitle> | |
42 | <manvolnum>3</manvolnum> | |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
46 | <refname>sd_uid_get_state</refname> | |
47 | <refname>sd_uid_is_on_seat</refname> | |
48 | <refname>sd_uid_get_sessions</refname> | |
49 | <refname>sd_uid_get_seats</refname> | |
623538c3 | 50 | <refname>sd_uid_get_display</refname> |
0b3b020a LP |
51 | <refpurpose>Determine login state of a specific Unix user ID</refpurpose> |
52 | </refnamediv> | |
53 | ||
54 | <refsynopsisdiv> | |
55 | <funcsynopsis> | |
56 | <funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo> | |
57 | ||
58 | <funcprototype> | |
59 | <funcdef>int <function>sd_uid_get_state</function></funcdef> | |
bd08f242 | 60 | <paramdef>uid_t <parameter>uid</parameter></paramdef> |
3b3d7d06 | 61 | <paramdef>char **<parameter>state</parameter></paramdef> |
0b3b020a LP |
62 | </funcprototype> |
63 | ||
64 | <funcprototype> | |
65 | <funcdef>int <function>sd_uid_is_on_seat</function></funcdef> | |
bd08f242 | 66 | <paramdef>uid_t <parameter>uid</parameter></paramdef> |
0b3b020a | 67 | <paramdef>int <parameter>require_active</parameter></paramdef> |
3b3d7d06 | 68 | <paramdef>const char *<parameter>seat</parameter></paramdef> |
0b3b020a LP |
69 | </funcprototype> |
70 | ||
71 | <funcprototype> | |
72 | <funcdef>int <function>sd_uid_get_sessions</function></funcdef> | |
bd08f242 | 73 | <paramdef>uid_t <parameter>uid</parameter></paramdef> |
0b3b020a | 74 | <paramdef>int <parameter>require_active</parameter></paramdef> |
3b3d7d06 | 75 | <paramdef>char ***<parameter>sessions</parameter></paramdef> |
0b3b020a LP |
76 | </funcprototype> |
77 | ||
78 | <funcprototype> | |
79 | <funcdef>int <function>sd_uid_get_seats</function></funcdef> | |
bd08f242 | 80 | <paramdef>uid_t <parameter>uid</parameter></paramdef> |
0b3b020a | 81 | <paramdef>int <parameter>require_active</parameter></paramdef> |
3b3d7d06 | 82 | <paramdef>char ***<parameter>seats</parameter></paramdef> |
0b3b020a | 83 | </funcprototype> |
623538c3 ZJS |
84 | |
85 | <funcprototype> | |
86 | <funcdef>int <function>sd_uid_get_display</function></funcdef> | |
87 | <paramdef>uid_t <parameter>uid</parameter></paramdef> | |
88 | <paramdef>char **<parameter>session</parameter></paramdef> | |
89 | </funcprototype> | |
0b3b020a LP |
90 | </funcsynopsis> |
91 | </refsynopsisdiv> | |
92 | ||
93 | <refsect1> | |
94 | <title>Description</title> | |
95 | ||
96 | <para><function>sd_uid_get_state()</function> may be | |
97 | used to determine the login state of a specific Unix | |
98 | user identifier. The following states are currently | |
99 | known: <literal>offline</literal> (user not logged in | |
100 | at all), <literal>lingering</literal> (user not logged | |
101 | in, but some user services running), | |
102 | <literal>online</literal> (user logged in, but not | |
7ea9cb91 LP |
103 | active, i.e. has no session in the foreground), |
104 | <literal>active</literal> (user logged in, and has at | |
105 | least one active session, i.e. one session in the | |
106 | foreground), <literal>closing</literal> (user not | |
107 | logged in, and not lingering, but some processes are | |
108 | still around). In the future additional states might | |
0b3b020a LP |
109 | be defined, client code should be written to be robust |
110 | in regards to additional state strings being | |
111 | returned. The returned string needs to be freed with | |
112 | the libc | |
5aded369 | 113 | <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
0b3b020a LP |
114 | call after use.</para> |
115 | ||
116 | <para><function>sd_uid_is_on_seat()</function> may be | |
117 | used to determine whether a specific user is logged in | |
118 | or active on a specific seat. Accepts a Unix user | |
119 | identifier and a seat identifier string as | |
120 | parameters. The <parameter>require_active</parameter> | |
79640424 | 121 | parameter is a boolean value. If non-zero (true), this |
0b3b020a LP |
122 | function will test if the user is active (i.e. has a |
123 | session that is in the foreground and accepting user | |
124 | input) on the specified seat, otherwise (false) only | |
125 | if the user is logged in (and possibly inactive) on | |
126 | the specified seat.</para> | |
127 | ||
128 | <para><function>sd_uid_get_sessions()</function> may | |
129 | be used to determine the current sessions of the | |
bb31a4ac | 130 | specified user. Accepts a Unix user identifier as |
0b3b020a | 131 | parameter. The <parameter>require_active</parameter> |
d18dff43 LP |
132 | parameter controls whether the returned list shall |
133 | consist of only those sessions where the user is | |
134 | currently active (> 0), where the user is currently | |
135 | online but possibly inactive (= 0), or | |
136 | logged in at all but possibly closing the session (< 0). The call returns a | |
74d00578 | 137 | <constant>NULL</constant> terminated string array of session identifiers in |
d18dff43 LP |
138 | <parameter>sessions</parameter> which needs to be |
139 | freed by the caller with the libc | |
5aded369 | 140 | <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
595aae37 LP |
141 | call after use, including all the strings |
142 | referenced. If the string array parameter is passed as | |
79640424 | 143 | <constant>NULL</constant>, the array will not be filled in, but the return |
595aae37 | 144 | code still indicates the number of current |
74d00578 | 145 | sessions. Note that instead of an empty array <constant>NULL</constant> may |
595aae37 LP |
146 | be returned and should be considered equivalent to an |
147 | empty array.</para> | |
0b3b020a | 148 | |
494a6682 | 149 | <para>Similarly, <function>sd_uid_get_seats()</function> |
0b3b020a LP |
150 | may be used to determine the list of seats on which |
151 | the user currently has sessions. Similar semantics | |
152 | apply, however note that the user may have | |
153 | multiple sessions on the same seat as well as sessions | |
154 | with no attached seat and hence the number of entries | |
155 | in the returned array may differ from the one returned | |
156 | by <function>sd_uid_get_sessions()</function>.</para> | |
623538c3 ZJS |
157 | |
158 | <para><function>sd_uid_get_display()</function> | |
159 | returns the name of the "primary" session of a user. | |
160 | If the user has graphical sessions, it will be the | |
161 | oldest graphical session. Otherwise, it will be the | |
162 | oldest open session.</para> | |
0b3b020a LP |
163 | </refsect1> |
164 | ||
165 | <refsect1> | |
166 | <title>Return Value</title> | |
167 | ||
b040723e | 168 | <para>On success, |
0b3b020a | 169 | <function>sd_uid_get_state()</function> returns 0 or a |
79640424 | 170 | positive integer. If the test succeeds, |
0b3b020a | 171 | <function>sd_uid_is_on_seat()</function> returns a |
b040723e | 172 | positive integer; if it fails, |
0b3b020a LP |
173 | 0. <function>sd_uid_get_sessions()</function> and |
174 | <function>sd_uid_get_seats()</function> return the | |
623538c3 ZJS |
175 | number of entries in the returned arrays. |
176 | <function>sd_uid_get_display()</function> returns | |
177 | a non-negative code on success. On failure, | |
0b3b020a LP |
178 | these calls return a negative errno-style error |
179 | code.</para> | |
180 | </refsect1> | |
181 | ||
182 | <refsect1> | |
183 | <title>Notes</title> | |
184 | ||
623538c3 ZJS |
185 | <para>Functions described here are available as a |
186 | shared library, and can be compiled and linked to | |
187 | using the | |
5aded369 | 188 | <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
623538c3 ZJS |
189 | entry.</para> |
190 | </refsect1> | |
191 | ||
192 | <refsect1> | |
193 | <title>History</title> | |
194 | ||
195 | <function>sd_uid_get_state()</function>, | |
0b3b020a | 196 | <function>sd_uid_is_on_seat()</function>, |
623538c3 ZJS |
197 | <function>sd_uid_get_sessions()</function>, |
198 | and <function>sd_uid_get_seats()</function> functions | |
199 | were added in systemd-31. | |
200 | ||
201 | <para><function>sd_uid_get_display()</function> was | |
202 | added in systemd-213.</para> | |
0b3b020a LP |
203 | </refsect1> |
204 | ||
205 | <refsect1> | |
206 | <title>See Also</title> | |
207 | ||
208 | <para> | |
209 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
cb07866b | 210 | <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
595aae37 | 211 | <citerefentry><refentrytitle>sd_pid_get_owner_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
0b3b020a LP |
212 | </para> |
213 | </refsect1> | |
214 | ||
215 | </refentry> |