bl_next_avail
extern char *bl_next_avail __P((int list_handle));
*pkg_entry = (struct dr_pkg_entry *)bl_next_avail(pkg_handle);
bl_next_avail(pinfo_handle);
data_area = bl_next_avail(array_ptr->data_handle);
pointer_area = (char **) bl_next_avail(list_handle);