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<a name="gconf-gconf-engine"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="gconf-gconf-engine.top_of_page"></a>GConfEngine</span></h2>
<p>GConfEngine — a GConf "database"</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="gconf-gconf-engine.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine">GConfEngine</a>;
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()">gconf_engine_get_default</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()">gconf_engine_get_for_address</a> (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *address</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-addresses" title="gconf_engine_get_for_addresses ()">gconf_engine_get_for_addresses</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gconf-gconf-engine.html#gconf-engine-unref" title="gconf_engine_unref ()">gconf_engine_unref</a> (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gconf-gconf-engine.html#gconf-engine-ref" title="gconf_engine_ref ()">gconf_engine_ref</a> (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local" title="gconf_engine_get_local ()">gconf_engine_get_local</a> (<em class="parameter"><code>const <span class="type">char</span> *address</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local-for-addresses" title="gconf_engine_get_local_for_addresses ()">gconf_engine_get_local_for_addresses</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gconf-gconf-engine.html#gconf-engine-set-user-data" title="gconf_engine_set_user_data ()">gconf_engine_set_user_data</a> (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> dnotify</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-user-data" title="gconf_engine_get_user_data ()">gconf_engine_get_user_data</a> (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.description"></a><h2>Description</h2>
<p>
A <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> represents a connection to the GConf database. The
default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, returned from <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()"><code class="function">gconf_engine_get_default()</code></a>, represents the
user's normal configuration source search path. Configuration-related
utilities, such as a configuration editor tool, might wish to access a
particular configuration source directly; they can obtain a
non-default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> with <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()"><code class="function">gconf_engine_get_for_address()</code></a>.
</p>
<p>
Once you have a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, you can query and manipulate
configuration values.
</p>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GConfEngine"></a><h3>GConfEngine</h3>
<pre class="programlisting">typedef struct _GConfEngine GConfEngine;</pre>
<p>
An opaque data type representing one or more configuration sources.
</p>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-default"></a><h3>gconf_engine_get_default ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * gconf_engine_get_default (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns the default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. All clients should use this, unless
they are special configuration-related tools. The caller of this
function assumes one reference count, and must call
<a class="link" href="gconf-gconf-engine.html#gconf-engine-unref" title="gconf_engine_unref ()"><code class="function">gconf_engine_unref()</code></a> at some point. It's fairly important to unref the
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, to cleanly close the connection to
<span class="application">gconfd</span>. So if possible close the connection
before exiting your application.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. <span class="annotation">[<a href="http://foldoc.org/transfer%20full"><span class="acronym">transfer full</span></a>]</span>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-for-address"></a><h3>gconf_engine_get_for_address ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * gconf_engine_get_for_address (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *address</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtains a special <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>; mostly useful for specialized
GConf-related tools. Normal clients shouldn't need to use it.
As with <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()"><code class="function">gconf_engine_get_default()</code></a>, the returned <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> should be
unreferenced by the caller of this function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>address</code></em> :</span></p></td>
<td>a configuration source address.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>err</code></em> :</span></p></td>
<td>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-for-addresses"></a><h3>gconf_engine_get_for_addresses ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * gconf_engine_get_for_addresses (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Similar to <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()"><code class="function">gconf_engine_get_for_address()</code></a> , but takes a list of addresses
instead of a single address.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>addresses</code></em> :</span></p></td>
<td>a list of configuration addresses.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>err</code></em> :</span></p></td>
<td>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-unref"></a><h3>gconf_engine_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gconf_engine_unref (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);</pre>
<p>
Decreases the reference count of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> by one; if the
reference count reaches 0, destroys the <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>conf</code></em> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-ref"></a><h3>gconf_engine_ref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gconf_engine_ref (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);</pre>
<p>
Increases the reference count of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> by one.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>conf</code></em> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-local"></a><h3>gconf_engine_get_local ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * gconf_engine_get_local (<em class="parameter"><code>const <span class="type">char</span> *address</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtain a local (non-process-transparent) <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. Local engines
do not support notification, and can only access config databases
directly (they do not use the multiple sources in a path system
supported by nonlocal engines).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>address</code></em> :</span></p></td>
<td>address of local database.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>err</code></em> :</span></p></td>
<td>return location of an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-local-for-addresses"></a><h3>gconf_engine_get_local_for_addresses ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> * gconf_engine_get_local_for_addresses
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtains a local <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> similar to <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local" title="gconf_engine_get_local ()"><code class="function">gconf_engine_get_local()</code></a>.
Instead of taking the address of the local database, this function takes
the addresses of the sources and gets the <a class="link" href="gconf-gconf-sources.html#GConfSources" title="struct GConfSources"><span class="type">GConfSources</span></a> using <a class="link" href="gconf-gconf-sources.html#gconf-sources-new-from-addresses" title="gconf_sources_new_from_addresses ()"><code class="function">gconf_sources_new_from_addresses()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>addresses</code></em> :</span></p></td>
<td>a list of addresses of <a class="link" href="gconf-gconf-sources.html#GConfSources" title="struct GConfSources"><span class="type">GConfSources</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>err</code></em> :</span></p></td>
<td>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-set-user-data"></a><h3>gconf_engine_set_user_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gconf_engine_set_user_data (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> dnotify</code></em>);</pre>
<p>
Sets the user_data and the destroy notification function fields of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>engine</code></em> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dnotify</code></em> :</span></p></td>
<td>a pointer to the function to be called during destroy.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-user-data"></a><h3>gconf_engine_get_user_data ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> gconf_engine_get_user_data (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>);</pre>
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Returns the user_data field of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
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<td><p><span class="term"><em class="parameter"><code>engine</code></em> :</span></p></td>
<td>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the user_data.</td>
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