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<h2 class="title" style="clear: both"><a id="envget_shm_key"></a>DB_ENV->get_shm_key()</h2>
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<pre class="programlisting">#include <db.h>
int
DB_ENV->get_shm_key(DB_ENV *dbenv, long *shm_keyp); </pre>
<p>
The <code class="methodname">DB_ENV->get_shm_key()</code> method returns the base segment ID. This is used for Berkeley DB environment
shared memory regions created in system memory on VxWorks or systems supporting X/Open-style shared memory
interfaces. It may be specified using the <a class="xref" href="envset_shm_key.html" title="DB_ENV->set_shm_key()">DB_ENV->set_shm_key()</a>
method.
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The <code class="methodname">DB_ENV->get_shm_key()</code> method may be called at any time during the
life of the application.
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The <code class="methodname">DB_ENV->get_shm_key()</code> <span>
<span>
method returns a non-zero error value on failure and 0 on success.
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<h4 class="title"><a id="idp59558456"></a>shm_keyp</h4>
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The <code class="methodname">DB_ENV->get_shm_key()</code> method returns the base segment ID in
<span class="bold"><strong>shm_keyp</strong></span>.
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<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>,
<a class="xref" href="envset_shm_key.html" title="DB_ENV->set_shm_key()">DB_ENV->set_shm_key()</a>
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