Re: dired-do-copy not really cp -p

[Richard Stallman]

    Gentlemen, I accuse the "[-p]" of  dired-do-copy's prompt,
       Copy [-p] * [4 files] to: /tmp/barf
    of being a big fat lie!  Firstly, we all know that the real cp -p preservers
    group and ownership.

It does that when you are root, but ordinarily it can only preserve
the date.  So ordinarily it is true that dired-do-copy works like cp
-p.

Would someone like to write the code to make dired-do-copy preserve
the group and owner when that is possible?