~ubuntu-branches/ubuntu/trusty/systemd/trusty

<a href="../libudev/index.html">gudev </a><hr><div class="refentry"><a name="sd_seat_get_active"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_seat_get_active, sd_seat_get_sessions, sd_seat_can_multi_session — Determine state of a specific seat</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_seat_get_active</b>(</code></td><td>const char* <var class="pdparam">seat</var>, </td></tr><tr><td> </td><td>char** <var class="pdparam">session</var>, </td></tr><tr><td> </td><td>uid_t* <var class="pdparam">uid</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_seat_get_sessions</b>(</code></td><td>const char* <var class="pdparam">seat</var>, </td></tr><tr><td> </td><td>char*** <var class="pdparam">sessions</var>, </td></tr><tr><td> </td><td>uid_t** <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>unsigned* <var class="pdparam">n_uids</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_seat_can_multi_session</b>(</code></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_seat_can_tty</b>(</code></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_seat_can_graphical</b>(</code></td><td>const char* <var class="pdparam">seat</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idp1723696"></a><h2>Description</h2><p><code class="function">sd_seat_get_active()</code> may be

<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 202</span><hr><div class="refentry"><a name="sd_seat_get_active"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_seat_get_active, sd_seat_get_sessions, sd_seat_can_multi_session — Determine state of a specific seat</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_seat_get_active</b>(</code></td><td>const char* <var class="pdparam">seat</var>, </td></tr><tr><td> </td><td>char** <var class="pdparam">session</var>, </td></tr><tr><td> </td><td>uid_t* <var class="pdparam">uid</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_seat_get_sessions</b>(</code></td><td>const char* <var class="pdparam">seat</var>, </td></tr><tr><td> </td><td>char*** <var class="pdparam">sessions</var>, </td></tr><tr><td> </td><td>uid_t** <var class="pdparam">uid</var>, </td></tr><tr><td> </td><td>unsigned* <var class="pdparam">n_uids</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_seat_can_multi_session</b>(</code></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_seat_can_tty</b>(</code></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_seat_can_graphical</b>(</code></td><td>const char* <var class="pdparam">seat</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idp26160"></a><h2>Description</h2><p><code class="function">sd_seat_get_active()</code> may be

used to determine which session is currently active on

a seat, if there is any. Returns the session

identifier and the user identifier of the Unix user

display.</p><p>If the <code class="literal">seat</code> parameter of any

of these functions is passed as NULL the operation is

executed for the seat of the session of the calling

process, if there is any.</p></div><div class="refsect1"><a name="idp29568"></a><h2>Return Value</h2><p> On success

process, if there is any.</p></div><div class="refsect1"><a name="idp36592"></a><h2>Return Value</h2><p> On success

<code class="function">sd_seat_get_active()</code>

returns 0 or a positive integer. On success

<code class="function">sd_seat_get_sessions()</code> returns

<code class="function">sd_seat_can_tty</code> and

<code class="function">sd_seat_can_graphical</code> return a

positive integer, if it fails 0. On failure, these

calls return a negative errno-style error code.</p></div><div class="refsect1"><a name="idp34624"></a><h2>Notes</h2><p>The <code class="function">sd_seat_get_active()</code>,

calls return a negative errno-style error code.</p></div><div class="refsect1"><a name="idp49008"></a><h2>Notes</h2><p>The <code class="function">sd_seat_get_active()</code>,

<code class="function">sd_seat_get_sessions()</code>,

<code class="function">sd_seat_can_multi_session()</code>,

<code class="function">sd_seat_can_tty()</code> and

and linked to with the

<code class="literal">libsystemd-login</code>

<a href="pkg-config.html"><span class="citerefentry"><span class="refentrytitle">pkg-config</span>(1)</span></a>

file.</p></div><div class="refsect1"><a name="idp48464"></a><h2>See Also</h2><p>

file.</p></div><div class="refsect1"><a name="idp55488"></a><h2>See Also</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_session_get_seat.html"><span class="citerefentry"><span class="refentrytitle">sd_session_get_seat</span>(3)</span></a>

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