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<h1>db_env_set_func_open</h1>
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<h3><pre>
#include &lt;db.h&gt;
<p>
int
db_env_set_func_open(int (*func_open)(const char *path, int flags, int mode));
</pre></h3>
<h1>Description</h1>
<p>Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX) <b>open</b> function
with <b>func_open</b>, which must conform to the standard interface.
<p>The db_env_set_func_open interface affects the entire application, not a single
database or database environment.
<p>While the db_env_set_func_open interface may be used to configure Berkeley DB at any time
during the life of the application, it should normally be called before
making any calls to the <a href="../api_c/env_create.html">db_env_create</a> or <a href="../api_c/db_create.html">db_create</a> functions.
<p>The db_env_set_func_open function returns a non-zero error value on failure and 0 on success.
<h1>Errors</h1>
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
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<h1>See Also</h1>
<a href="../api_c/set_func_close.html">db_env_set_func_close</a>,
<a href="../api_c/set_func_dirfree.html">db_env_set_func_dirfree</a>,
<a href="../api_c/set_func_dirlist.html">db_env_set_func_dirlist</a>,
<a href="../api_c/set_func_exists.html">db_env_set_func_exists</a>,
<a href="../api_c/set_func_free.html">db_env_set_func_free</a>,
<a href="../api_c/set_func_fsync.html">db_env_set_func_fsync</a>,
<a href="../api_c/set_func_ioinfo.html">db_env_set_func_ioinfo</a>,
<a href="../api_c/set_func_malloc.html">db_env_set_func_malloc</a>,
<a href="../api_c/set_func_map.html">db_env_set_func_map</a>,
<a href="../api_c/set_func_open.html">db_env_set_func_open</a>,
<a href="../api_c/set_func_read.html">db_env_set_func_read</a>,
<a href="../api_c/set_func_realloc.html">db_env_set_func_realloc</a>,
<a href="../api_c/set_func_seek.html">db_env_set_func_seek</a>,
<a href="../api_c/set_func_sleep.html">db_env_set_func_sleep</a>,
<a href="../api_c/set_func_unlink.html">db_env_set_func_unlink</a>,
<a href="../api_c/set_func_unmap.html">db_env_set_func_unmap</a>,
<a href="../api_c/set_func_write.html">db_env_set_func_write</a>
and
<a href="../api_c/set_func_yield.html">db_env_set_func_yield</a>.
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