perl递归读取目录下文件

#!/usr/bin/perl
my $indir = $ARGV[0];
&find_fileindir("$indir");
sub find_fileindir(){
  local($dir) = @_;
  opendir(DIR,"$dir"|| die "can't open this $dir");
  local @files =readdir(DIR);
  closedir(DIR);
  for $file (@files){
    next if($file=~m/\.$/ || $file =~m/\.\.$/);
    if ($file =~/\.(sql)$/i){
        print "$dir\/$file \n";
    }
    elsif(-d "$dir/$file"){
            find_fileindir("$dir/$file" );
    }
  }
}