$ perl -e '
use strict;
use warnings;
my @files = glob("*.msg");
for my $file (@files) {
    my $cmd = "ls -l $file";
    system($cmd);
}
'
-rw-r--r--  1 ken  staff  10 26 Oct 03:01 a.msg
-rw-r--r--  1 ken  staff  10 26 Oct 03:01 b.msg
-rw-r--r--  1 ken  staff  10 26 Oct 03:02 c.msg