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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="c-examples"></a>C examples</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="c-examples.html#c-schema-example">C example: Define a password schema</a></span></dt>
<dt><span class="section"><a href="c-store-example.html">C example: Store a password</a></span></dt>
<dt><span class="section"><a href="c-lookup-example.html">C example: Lookup a password</a></span></dt>
<dt><span class="section"><a href="c-remove-example.html">C example: Remove a password</a></span></dt>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="c-schema-example"></a>C example: Define a password schema</h2></div></div></div>
<p>Each stored password has a set of attributes which are later
used to lookup the password. The names and types of the attributes
are defined in a schema. The schema is usually defined once globally.
Here's how to define a schema:</p>
<div class="informalexample">
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<td class="listing_code"><pre class="programlisting"><span class="comment">/* in a header: */</span>
<span class="keyword">const</span><span class="normal"> <a href="libsecret-SecretSchema.html#SecretSchema">SecretSchema</a> </span><span class="symbol">*</span><span class="normal"> </span><span class="function">example_get_schema</span><span class="normal"> </span><span class="symbol">(</span><span class="type">void</span><span class="symbol">)</span><span class="normal"> <a href="https://developer.gnome.org/glib/unstable/glib-Miscellaneous-Macros.html#G-GNUC-CONST:CAPS">G_GNUC_CONST</a></span><span class="symbol">;</span>
<span class="preproc">#define</span><span class="normal"> </span><span class="usertype">EXAMPLE_SCHEMA</span><span class="normal"> </span><span class="function">example_get_schema</span><span class="normal"> </span><span class="symbol">()</span>
<span class="comment">/* in a .c file: */</span>
<span class="keyword">const</span><span class="normal"> <a href="libsecret-SecretSchema.html#SecretSchema">SecretSchema</a> </span><span class="symbol">*</span>
<span class="function">example_get_schema</span><span class="normal"> </span><span class="symbol">(</span><span class="type">void</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal"> </span><span class="keyword">static</span><span class="normal"> </span><span class="keyword">const</span><span class="normal"> </span><span class="usertype">SecretSchema</span><span class="normal"> the_schema </span><span class="symbol">=</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal"> </span><span class="string">"org.example.Password"</span><span class="symbol">,</span><span class="normal"> <a href="libsecret-SecretSchema.html#SECRET-SCHEMA-NONE:CAPS">SECRET_SCHEMA_NONE</a></span><span class="symbol">,</span>
<span class="normal"> </span><span class="cbracket">{</span>
<span class="normal"> </span><span class="cbracket">{</span><span class="normal"> </span><span class="string">"number"</span><span class="symbol">,</span><span class="normal"> <a href="libsecret-SecretSchema.html#SECRET-SCHEMA-ATTRIBUTE-INTEGER:CAPS">SECRET_SCHEMA_ATTRIBUTE_INTEGER</a> </span><span class="cbracket">}</span><span class="symbol">,</span>
<span class="normal"> </span><span class="cbracket">{</span><span class="normal"> </span><span class="string">"string"</span><span class="symbol">,</span><span class="normal"> <a href="libsecret-SecretSchema.html#SECRET-SCHEMA-ATTRIBUTE-STRING:CAPS">SECRET_SCHEMA_ATTRIBUTE_STRING</a> </span><span class="cbracket">}</span><span class="symbol">,</span>
<span class="normal"> </span><span class="cbracket">{</span><span class="normal"> </span><span class="string">"even"</span><span class="symbol">,</span><span class="normal"> <a href="libsecret-SecretSchema.html#SECRET-SCHEMA-ATTRIBUTE-BOOLEAN:CAPS">SECRET_SCHEMA_ATTRIBUTE_BOOLEAN</a> </span><span class="cbracket">}</span><span class="symbol">,</span>
<span class="normal"> </span><span class="cbracket">{</span><span class="normal"> </span><span class="string">"NULL"</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="normal"> </span><span class="cbracket">}</span><span class="symbol">,</span>
<span class="normal"> </span><span class="cbracket">}</span>
<span class="normal"> </span><span class="cbracket">}</span><span class="symbol">;</span>
<span class="normal"> </span><span class="keyword">return</span><span class="normal"> </span><span class="symbol">&</span><span class="normal">the_schema</span><span class="symbol">;</span>
<span class="cbracket">}</span></pre></td>
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<p>See the <a class="link" href="c-store-example.html" title="C example: Store a password">other examples</a> for how
to use the schema.</p>
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