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<div class="sect1" lang="en" xml:lang="en">
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<h2 class="title" style="clear: both"><a id="envfileid_reset"></a>DbEnv::fileid_reset()</h2>
</div>
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</div>
<pre class="programlisting">#include <db_cxx.h>
int
DbEnv::fileid_reset(const char *file, u_int32_t flags);</pre>
<p>
The <code class="methodname">DbEnv::fileid_reset()</code> method allows database files to be copied,
and then the copy used in the same database environment as the
original.
</p>
<p>
All databases contain an ID string used to identify the database in
the database environment cache. If a physical database file is
copied, and used in the same environment as another file with the same
ID strings, corruption can occur. The <code class="methodname">DbEnv::fileid_reset()</code> method
creates new ID strings for all of the databases in the physical file.
</p>
<p>
The <code class="methodname">DbEnv::fileid_reset()</code> method modifies the physical file,
in-place. Applications should not reset IDs in files that are
currently in use.
</p>
<p>
The <code class="methodname">DbEnv::fileid_reset()</code> method may be called at any time during
the life of the application.
</p>
<p>
The <code class="methodname">DbEnv::fileid_reset()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
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<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="idp6772320"></a>Parameters</h3>
</div>
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<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6771672"></a>file</h4>
</div>
</div>
</div>
<p>
The name of the physical file in which new file IDs are to be created.
</p>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6777184"></a>flags</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>flags</strong></span> parameter must be set to 0
or the following value:
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>
<code class="literal">DB_ENCRYPT</code>
</p>
<p>
The file contains encrypted databases.
</p>
</li>
</ul>
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<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="idp6778368"></a>Errors</h3>
</div>
</div>
</div>
<p>
The <code class="methodname">DbEnv::fileid_reset()</code> <span>
<span>
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp6786416"></a>EINVAL</h4>
</div>
</div>
</div>
<p>
An invalid flag value or parameter was specified.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
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<h3 class="title"><a id="idp6785120"></a>Class</h3>
</div>
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<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>
</p>
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<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="idp6781752"></a>See Also</h3>
</div>
</div>
</div>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>
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