db_env_set_func_dirfree
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## db_env_set_func_dirfree

    #include <db.h>

    int
    db_env_set_func_dirfree(void (*func_dirfree)(char **namesp, int cnt));

The Berkeley DB library requires the ability to return any memory allocated as part of the routine which reads through a directory and creates a list of files that the directory contains (see db_env_set_func_dirlist).

The `db_env_set_func_dirfree()` function 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_dirfree()` function may be called at any time during the life of the application, it should normally be called before making calls to the db_env_create or db_create methods.

The `db_env_set_func_dirfree()` function returns a non-zero error value on failure and 0 on success.

### Parameters

#### func_dirfree

The func_dirfree parameter is a function which frees the memory returned from the db_env_set_func_dirlist function.

The namesp and cnt parameters to this function are the same values as were returned by the db_env_set_func_dirlist function.

### See Also

Run-time configuration

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