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<title>lwres_config</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry">
<a name="id-1"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p>
lwres_conf_init,
lwres_conf_clear,
lwres_conf_parse,
lwres_conf_print,
lwres_conf_get
— lightweight resolver configuration
</p>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="funcsynopsis">
<pre class="funcsynopsisinfo">#include <lwres/lwres.h></pre>
<table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr>
<td><code class="funcdef">
void
<b class="fsfunc">lwres_conf_init</b>(</code></td>
<td>lwres_context_t *<var class="pdparam">ctx</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">
void
<b class="fsfunc">lwres_conf_clear</b>(</code></td>
<td>lwres_context_t *<var class="pdparam">ctx</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">
lwres_result_t
<b class="fsfunc">lwres_conf_parse</b>(</code></td>
<td>lwres_context_t *<var class="pdparam">ctx</var>, </td>
</tr>
<tr>
<td> </td>
<td>const char *<var class="pdparam">filename</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">
lwres_result_t
<b class="fsfunc">lwres_conf_print</b>(</code></td>
<td>lwres_context_t *<var class="pdparam">ctx</var>, </td>
</tr>
<tr>
<td> </td>
<td>FILE *<var class="pdparam">fp</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">
lwres_conf_t *
<b class="fsfunc">lwres_conf_get</b>(</code></td>
<td>lwres_context_t *<var class="pdparam">ctx</var><code>)</code>;</td>
</tr></table>
<div class="funcprototype-spacer"> </div>
</div>
</div>
<div class="refsection">
<a name="id-1.7"></a><h2>DESCRIPTION</h2>
<p><code class="function">lwres_conf_init()</code>
creates an empty
<span class="type">lwres_conf_t</span>
structure for lightweight resolver context
<em class="parameter"><code>ctx</code></em>.
</p>
<p><code class="function">lwres_conf_clear()</code>
frees up all the internal memory used by
that
<span class="type">lwres_conf_t</span>
structure in resolver context
<em class="parameter"><code>ctx</code></em>.
</p>
<p><code class="function">lwres_conf_parse()</code>
opens the file
<em class="parameter"><code>filename</code></em>
and parses it to initialise the resolver context
<em class="parameter"><code>ctx</code></em>'s
<span class="type">lwres_conf_t</span>
structure.
</p>
<p><code class="function">lwres_conf_print()</code>
prints the
<span class="type">lwres_conf_t</span>
structure for resolver context
<em class="parameter"><code>ctx</code></em>
to the
<span class="type">FILE</span>
<em class="parameter"><code>fp</code></em>.
</p>
</div>
<div class="refsection">
<a name="id-1.8"></a><h2>RETURN VALUES</h2>
<p><code class="function">lwres_conf_parse()</code>
returns <span class="errorcode">LWRES_R_SUCCESS</span>
if it successfully read and parsed
<em class="parameter"><code>filename</code></em>.
It returns <span class="errorcode">LWRES_R_FAILURE</span>
if <em class="parameter"><code>filename</code></em>
could not be opened or contained incorrect
resolver statements.
</p>
<p><code class="function">lwres_conf_print()</code>
returns <span class="errorcode">LWRES_R_SUCCESS</span>
unless an error occurred when converting the network addresses to a
numeric host address string.
If this happens, the function returns
<span class="errorcode">LWRES_R_FAILURE</span>.
</p>
</div>
<div class="refsection">
<a name="id-1.9"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry">
<span class="refentrytitle">stdio</span>(3)
</span>,
<span class="citerefentry">
<span class="refentrytitle">resolver</span>(5)
</span>.
</p>
</div>
<div class="refsection">
<a name="id-1.10"></a><h2>FILES</h2>
<p><code class="filename">/etc/resolv.conf</code>
</p>
</div>
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