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- <a href="../libudev/index.html">gudev </a><span style="float:right">systemd 217</span><hr><div class="refentry"><a name="sd_uid_get_state"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_uid_get_state, sd_uid_is_on_seat, sd_uid_get_sessions, sd_uid_get_seats, sd_uid_get_display — Determine login state of a specific Unix user ID</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <systemd/sd-login.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_state</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>char **<var class="pdparam">state</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_is_on_seat</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>const char *<var class="pdparam">seat</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_sessions</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">sessions</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_seats</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">seats</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_display</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>char **<var class="pdparam">session</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm214177844416"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="function">sd_uid_get_state()</code> may be
+ <a href="../libudev/index.html">gudev </a><span style="float:right">systemd 218</span><hr><div class="refentry"><a name="sd_uid_get_state"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_uid_get_state, sd_uid_is_on_seat, sd_uid_get_sessions, sd_uid_get_seats, sd_uid_get_display — Determine login state of a specific Unix user ID</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <systemd/sd-login.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_state</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>char **<var class="pdparam">state</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_is_on_seat</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>const char *<var class="pdparam">seat</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_sessions</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">sessions</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_seats</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">require_active</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">seats</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_uid_get_display</b>(</code></td><td>uid_t <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>char **<var class="pdparam">session</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm140032263175824"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="function">sd_uid_get_state()</code> may be
used to determine the login state of a specific Unix
user identifier. The following states are currently
known: "<code class="literal">offline</code>" (user not logged in
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.</p></div><div class="refsect1"><a name="idm214181723120"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>On success,
+ oldest open session.</p></div><div class="refsect1"><a name="idm140032263149552"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>On success,
<code class="function">sd_uid_get_state()</code> returns 0 or a
positive integer. If the test succeeds,
<code class="function">sd_uid_is_on_seat()</code> returns a
<code class="function">sd_uid_get_display()</code> returns
a non-negative code on success. On failure,
these calls return a negative errno-style error
- code.</p></div><div class="refsect1"><a name="idm214181718240"></a><h2 id="Notes">Notes<a class="headerlink" title="Permalink to this headline" href="#Notes">¶</a></h2><p>Functions described here are available as a
+ code.</p></div><div class="refsect1"><a name="idm140032263144560"></a><h2 id="Notes">Notes<a class="headerlink" title="Permalink to this headline" href="#Notes">¶</a></h2><p>Functions described here are available as a
shared library, and can be compiled and linked to
using the
<code class="constant">libsystemd</code> <a href="http://linux.die.net/man/1/pkg-config"><span class="citerefentry"><span class="refentrytitle">pkg-config</span>(1)</span></a>
- entry.</p></div><div class="refsect1"><a name="idm214181715280"></a><h2 id="History">History<a class="headerlink" title="Permalink to this headline" href="#History">¶</a></h2><code class="function">sd_uid_get_state()</code>,
+ entry.</p></div><div class="refsect1"><a name="idm140032263141600"></a><h2 id="History">History<a class="headerlink" title="Permalink to this headline" href="#History">¶</a></h2><code class="function">sd_uid_get_state()</code>,
<code class="function">sd_uid_is_on_seat()</code>,
<code class="function">sd_uid_get_sessions()</code>,
and <code class="function">sd_uid_get_seats()</code> functions
were added in systemd-31.
<p><code class="function">sd_uid_get_display()</code> was
- added in systemd-213.</p></div><div class="refsect1"><a name="idm214181710688"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
+ added in systemd-213.</p></div><div class="refsect1"><a name="idm140032263137008"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="sd-login.html"><span class="citerefentry"><span class="refentrytitle">sd-login</span>(3)</span></a>,
<a href="sd_pid_get_owner_uid.html"><span class="citerefentry"><span class="refentrytitle">sd_pid_get_owner_uid</span>(3)</span></a>