ls -l

-rw-rw-r-- 1 io io  0 feb  2 13:28 one.txt
-rw-rw-r-- 1 io io  0 feb  2 13:28 three.txt
-rw-rw-r-- 1 io io 20 feb  2 13:37 two.txt

perl -nlE 'say "processed $ARGV" if eof' *.txt
processed two.txt