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<th colspan="3" align="center">Run-time configuration</th>
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<th width="60%" align="center">Chapter 15. Programmer Notes </th>
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<div>
<h2 class="title" style="clear: both"><a id="program_runtime"></a>Run-time configuration</h2>
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<p>
It is possible for applications to configure Berkeley DB at
run-time to redirect Berkeley DB library and system calls to
alternate interfaces. For example, an application might want
Berkeley DB to call debugging memory allocation routines
rather than the standard C library interfaces. The following
interfaces support this functionality:
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<div class="itemizedlist">
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<li>
<p> <a href="../api_reference/C/db_env_set_func_close.html" class="olink">db_env_set_func_close</a> </p>
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<li>
<p> <a href="../api_reference/C/db_env_set_func_dirfree.html" class="olink">db_env_set_func_dirfree</a> </p>
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<li>
<p> <a href="../api_reference/C/db_env_set_func_dirlist.html" class="olink">db_env_set_func_dirlist</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_exists.html" class="olink">db_env_set_func_exists</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_file_map.html" class="olink">db_env_set_func_file_map</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_free.html" class="olink">db_env_set_func_free</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_fsync.html" class="olink">db_env_set_func_fsync</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_ftruncate.html" class="olink">db_env_set_func_ftruncate</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_ioinfo.html" class="olink">db_env_set_func_ioinfo</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_malloc.html" class="olink">db_env_set_func_malloc</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_open.html" class="olink">db_env_set_func_open</a> </p>
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<p> <a href="../api_reference/C/db_env_set_func_pread.html" class="olink">db_env_set_func_pread</a> </p>
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<p> <a href="../api_reference/C/db_env_set_func_pwrite.html" class="olink">db_env_set_func_pwrite</a> </p>
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<p> <a href="../api_reference/C/db_env_set_func_read.html" class="olink">db_env_set_func_read</a> </p>
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<li>
<p> <a href="../api_reference/C/db_env_set_func_realloc.html" class="olink">db_env_set_func_realloc</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_region_map.html" class="olink">db_env_set_func_region_map</a> </p>
</li>
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<p> <a href="../api_reference/C/db_env_set_func_rename.html" class="olink">db_env_set_func_rename</a> </p>
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<p> <a href="../api_reference/C/db_env_set_func_seek.html" class="olink">db_env_set_func_seek</a> </p>
</li>
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<p> <a href="../api_reference/C/db_env_set_func_unlink.html" class="olink">db_env_set_func_unlink</a> </p>
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<p> <a href="../api_reference/C/db_env_set_func_write.html" class="olink">db_env_set_func_write</a> </p>
</li>
<li>
<p> <a href="../api_reference/C/db_env_set_func_yield.html" class="olink">db_env_set_func_yield</a> </p>
</li>
</ul>
</div>
<p>
These interfaces are available only on POSIX platforms and
from the Berkeley DB C language API.
</p>
<p>
A not-uncommon problem for applications is the new API in
Solaris 2.6 for manipulating large files. Because this API was
not part of Solaris 2.5, it is difficult to create a single
binary that takes advantage of the large file functionality in
Solaris 2.6, but still runs on Solaris 2.5. <a class="ulink" href="solaris.txt" target="_top">Example code</a> that supports this
is included in the Berkeley DB distribution, however, the
example code was written using previous versions of the
Berkeley DB APIs, and is only useful as an example.
</p>
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<td width="40%" align="left" valign="top">Compatibility with historic UNIX interfaces </td>
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<a accesskey="h" href="index.html">Home</a>
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<td width="40%" align="right" valign="top"> Performance Event
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