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perl script_name.pl -dir "/home/test/input_dir" -file input_file_1 inp
+ut_file_2 input_file_3

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);
}