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 for my $i(@contents) {
   if ( -f "$from/$i" ) {
     copy("$from/$i","$to/$i");
    }
 }

  my( $uid, $gid ) = (stat $i)[4,5];
  copy "from/$i", "$to/$i";
  chown $uid, $gid, "$to/$i" or die "chown $to/$i (uid=$uid, gid=$gid)
+ failed: $!";