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<h2 class="title" style="clear: both"><a id="db_env_set_func_write"></a>db_env_set_func_write</h2>
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<pre class="programlisting">#include <db.h>
int
db_env_set_func_write(ssize_t (*func_write)(int fd, const void *buffer,
size_t nbytes)); </pre>
<p>
Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX)
<span class="bold"><strong>write</strong></span> function with <span class="bold"><strong>func_write</strong></span>, which must conform to the standard
interface specification.
</p>
<p>
The <code class="function">db_env_set_func_write()</code> function configures all operations performed
by a process and all of its threads of control, not operations
confined to a single database environment.
</p>
<p>
Although the <code class="function">db_env_set_func_write()</code> function may be called at any time
during the life of the application, it should normally be called
before making calls to the <a class="xref" href="envcreate.html" title="db_env_create">db_env_create</a> or
<a class="xref" href="dbcreate.html" title="db_create">db_create</a> methods.
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<p>
The <code class="function">db_env_set_func_write()</code> <span>
function returns a non-zero error value on failure and 0 on success.
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<h4 class="title"><a id="id1721359"></a>func_write</h4>
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The <span class="bold"><strong>func_write</strong></span> parameter is the
replacement function. It must conform to the standard interface
specification.
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<a href="../../programmer_reference/program_runtime.html" class="olink">Run-time configuration</a>
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