Expand the DNUM and DREAD functions with an additional "modifier" parameter, so hidden files (where the name starts with a dot) are included in the count and can be found.
Such files can be listed by using the -a parameter of the ls command, so their "hidden" status is relative, and the additional parameter of the functions would avoid the need to use external commands (which, in turn, forces SAS admins to enable XCMD).
