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<section id="server-information">
<h1>Server information<a class="headerlink" href="#server-information" title="Link to this heading"></a></h1>
<p>Information related to a virtual server can be queried and modified.</p>
<p>Available server properties are described in <a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><code class="xref c c-enum docutils literal notranslate"><span class="pre">VirtualServerProperties</span></code></a> and <code class="xref c c-enum docutils literal notranslate"><span class="pre">VirtualServerPropertiesSDK</span></code>.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The server always has all the information about all servers that exist.</p>
<p>Limitations regarding availability mentioned for the variables are thus of no concern for the server.</p>
</div>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Servers that are stopped using <a class="reference internal" href="vserver-manage.html#c.ts3server_stopVirtualServer" title="ts3server_stopVirtualServer"><code class="xref c c-func docutils literal notranslate"><span class="pre">ts3server_stopVirtualServer()</span></code></a> no longer exist within the
server library and querying them will thus fail.</p>
</div>
<section id="query-server-information">
<h2>Query server information<a class="headerlink" href="#query-server-information" title="Link to this heading"></a></h2>
<p>To query server information use one of the following functions, depending
on the type of the information you want to query.</p>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_getVirtualServerVariableAsInt</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">result</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>get the value of a server variable </p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> the server of which to get a variable value </p></li>
<li><p><strong>flag</strong> specifies for which variable to get the value. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>result</strong> address of a variable to receive the result </p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_getVirtualServerVariableAsUInt64</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">result</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>get the value of a server variable </p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> the server of which to get a variable value </p></li>
<li><p><strong>flag</strong> specifies for which variable to get the value. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>result</strong> address of a variable to receive the result. </p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_getVirtualServerVariableAsString</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="kt"><span class="pre">char</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">result</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>get the value of a server variable </p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> the server of which to get a variable value </p></li>
<li><p><strong>flag</strong> specifies for which variable to get the value. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>result</strong> address of a variable to receive a utf8 encoded c string containing the value. Memory is allocated by the server library and must be freed by the caller using <a class="reference internal" href="../server_api.html#serverlib_8h_1a6993000e98ccfa4ecf0a6f3d92406e5e"><span class="std std-ref">ts3server_freeMemory</span></a></p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<section id="example">
<h3>Example<a class="headerlink" href="#example" title="Link to this heading"></a></h3>
<p>Example checking the number of clients online, obviously an integer
value:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos">1</span><span class="kt">int</span><span class="w"> </span><span class="n">clientsOnline</span><span class="p">;</span>
<span class="linenos">2</span>
<span class="linenos">3</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">ts3server_getVirtualServerVariableAsInt</span><span class="p">(</span><span class="n">serverID</span><span class="p">,</span><span class="w"> </span><span class="n">VIRTUALSERVER_CLIENTS_ONLINE</span><span class="p">,</span><span class="w"> </span><span class="o">&amp;</span><span class="n">clientsOnline</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">ERROR_ok</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="linenos">4</span><span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">&quot;There are %d clients online</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">clientsOnline</span><span class="p">);</span>
<span class="linenos">5</span><span class="p">}</span>
</pre></div>
</div>
</section>
</section>
<section id="change-server-information">
<h2>Change server information<a class="headerlink" href="#change-server-information" title="Link to this heading"></a></h2>
<p>Server information can be modified using</p>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_setVirtualServerVariableAsInt</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">value</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>set a new value for a server variable </p>
<p>After youre done setting all the variables you need to change, a call to <a class="reference internal" href="../server_api.html#serverlib_8h_1a5e65abfcdaf9a5c9b70c4fe97200935b"><span class="std std-ref">ts3server_flushVirtualServerVariable</span></a> is necessary to publish the changes</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> specifies which server to set the variable on </p></li>
<li><p><strong>flag</strong> specifies which server variable to set. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>value</strong> the new value to set </p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_setVirtualServerVariableAsUInt64</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">value</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>set a new value for a server variable </p>
<p>After youre done setting all the variables you need to change, a call to <a class="reference internal" href="../server_api.html#serverlib_8h_1a5e65abfcdaf9a5c9b70c4fe97200935b"><span class="std std-ref">ts3server_flushVirtualServerVariable</span></a> is necessary to publish the changes</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> specifies which server to set the variable on </p></li>
<li><p><strong>flag</strong> specifies which server variable to set. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>value</strong> the new value to set </p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c">
<span class="kt"><span class="pre">unsigned</span></span><span class="w"> </span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">ts3server_setVirtualServerVariableAsString</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">uint64</span></span><span class="w"> </span><span class="n"><span class="pre">serverID</span></span>, <span class="k"><span class="pre">enum</span></span><span class="w"> </span><a class="reference internal" href="../properties.html#c.VirtualServerProperties" title="VirtualServerProperties"><span class="n"><span class="pre">VirtualServerProperties</span></span></a><span class="w"> </span><span class="n"><span class="pre">flag</span></span>, <span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="kt"><span class="pre">char</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">value</span></span><span class="sig-paren">)</span><br /></dt>
<dd><p>set a new value for a server variable </p>
<p>After youre done setting all the variables you need to change, a call to <a class="reference internal" href="../server_api.html#serverlib_8h_1a5e65abfcdaf9a5c9b70c4fe97200935b"><span class="std std-ref">ts3server_flushVirtualServerVariable</span></a> is necessary to publish the changes</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>serverID</strong> specifies which server to set the variable on </p></li>
<li><p><strong>flag</strong> specifies which server variable to set. One of the values from the <a class="reference internal" href="../properties.html#public__definitions_8h_1adcce9c82f0123acf4ab8f75ef5be93f9"><span class="std std-ref">VirtualServerProperties</span></a> enum </p></li>
<li><p><strong>value</strong> the new value to set </p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An Error code from the <a class="reference internal" href="../errors.html#public__errors_8h_1a0bcf1e0a5e32989890f6e85064327f7b"><span class="std std-ref">Ts3ErrorType</span></a> enum indicating either success or the failure reason </p>
</dd>
</dl>
</dd></dl>
<div class="admonition important">
<p class="admonition-title">Important</p>
<p>After modifying one or more server variables, you <strong>must</strong> flush the
changes using <a class="reference internal" href="../server_api.html#c.ts3server_flushVirtualServerVariable" title="ts3server_flushVirtualServerVariable"><code class="xref c c-func docutils literal notranslate"><span class="pre">ts3server_flushVirtualServerVariable()</span></code></a>.</p>
</div>
<section id="id1">
<h3>Example<a class="headerlink" href="#id1" title="Link to this heading"></a></h3>
<p>Example: Change the servers welcome message:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos">1</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">ts3server_setVirtualServerVariableAsString</span><span class="p">(</span><span class="n">serverID</span><span class="p">,</span><span class="w"> </span><span class="n">VIRTUALSERVER_WELCOMEMESSAGE</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;New welcome message&quot;</span><span class="p">)</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="n">ERROR_ok</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="linenos">2</span><span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">&quot;Error setting server welcomemessage</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
<span class="linenos">3</span><span class="w"> </span><span class="k">return</span><span class="p">;</span>
<span class="linenos">4</span><span class="p">}</span>
<span class="linenos">5</span>
<span class="linenos">6</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">ts3server_flushVirtualServerVariable</span><span class="p">(</span><span class="n">serverID</span><span class="p">)</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="n">ERROR_ok</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="linenos">7</span><span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">&quot;Error flushing server variable</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
<span class="linenos">8</span><span class="p">}</span>
</pre></div>
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