extern command_ret_t do_env_set(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_env_save(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_loadf(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_env_set(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_env_save(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_loadf(cmd_tbl_t *, int, int, char * const []);