perl script_name.pl -dir "/home/test/input_dir" -file input_file_1 input_file_2 input_file_3

##</code><code>##

foeach my $file_names ( @file_names_passed ) {
   open ( FH , "$dir_path/$file_name) or die "$!";
   # managed to do some operation on the file.
   close(FH);
}