How to get Perl to loop over all files in a directory?

How to get Perl to loop over all files in a directory?

I have a Perl script with contains
open (FILE, '<', "$ARGV[0]") || die "Unable to open $ARGV[0]\n";
while (defined (my $line = <FILE>)) {
# do stuff
}
close FILE;
and I would like to run this script on all .pp files in a directory, so I
have written a wrapper script in Bash
#!/bin/bash
for f in /etc/puppet/nodes/*.pp; do
/etc/puppet/nodes/brackets.pl $f
done
Question
Is it possible to avoid the wrapper script and have the Perl script do it
instead?