If you're typing
makeupscript.pl -c *.txt
on your shell's command line, the shell will expand that to
makeupscript.pl -c foo.txt bar.txt baz.txt ...
and pass on the expanded file names to the perl script. However, if you prevent expansion by saying
makeupscript.pl -c '*.txt'
then your script will indeed find
*.txt somewhere in
@ARGS. To do the expansion yourself, check
perldoc -f glob.
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