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db_env_set_func_dirlist
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#include &lt;db.h&gt;

int
db_env_set_func_dirlist(int (*func_dirlist)(const char *dir, char ***namesp, int *cntp));
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Description: db_env_set_func_dirlist
The Berkeley DB library requires the ability to read through a directory and
create a list of files that the directory contains.
The db_env_set_func_dirlist method configures all operations performed by a process and
all of its threads of control, not operations confined to a single
database environment.
Although the db_env_set_func_dirlist method may be called at any time during the life of
the application, it should normally be called before making calls to the
<a href="../../db4-devel-4.7.25/api_c/env_class.html">db_env_create</a> or <a href="../../db4-devel-4.7.25/api_c/db_class.html">db_create</a> methods.
The db_env_set_func_dirlist method
returns a non-zero error value on failure
and 0 on success.

Parameters 
 func_dirlist<ul compact><li>The func_dirlist parameter is the function which reads through
a directory and returns a list of the files it contains.
The dir parameter to this function is the name of the directory
to be searched.
The function must return a pointer to an array of nul-terminated file
names into the memory location to which the namesp parameter
refers, and a count of the number of elements in the array into the
memory location to which cntp refers.</ul>
The func_dirlist function must return the value of errno on
failure and 0 on success.
 
 See Also
<a href="../../db4-devel-4.7.25/ref/program/runtime.html">Run-time configuration</a>
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