### db_env_set_func_write |

`

###

    #include <db.h>

    int
    db_env_set_func_write(
        ssize_t (*func_write)(int fd, const void *buffer, size_t nbytes));

### Description: db_env_set_func_write

Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX) write function with func_write, which must conform to the standard interface specification.

The db_env_set_func_write 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_write method 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_write method returns a non-zero error value on failure and 0 on success.

### Parameters

func_write
  The func_write parameter is the replacement function. It must conform to the standard interface specification.

### See Also

Run-time configuration`

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