SAS: Use Filename to Create data set of hierarchical folder structure and file list

FILENAME contents pipe 'TREE "x:\project" /F /A' LRECL = 2000;
DATA project;
infile contents TRUNCOVER;
INPUT content_entry $char2000.;
content_entry = left(compress(content_entry, "|"));
run;

TREE: disply each directory within the listed directory. /F: display the names of the files within each directory.

proc sql noprint;
select count (*) into : file_exist
from project
where content_entry = "table1.sas7bdat";
quit;

%put file_exist = &file_exist.;