dpending on the program behavior, you might just be able to do this in the shell, too by either piping the content (stuff to type) or redirects.

cat /tmp/stuff.txt | yourprog
yourprog < /tmp/stuff.txt

# if it's just the filename you need (if not, can always use <c>echo -
+e</c> to print \n newlines):
echo filename.ext | yourprog

# loop (bash syntax) over all your files and process them:
for f in *.dat ; do echo $f | yourprog ; done
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