On 1 February 2013 21:36, Paul Eggert <eggert@cs.ucla.edu> wrote:

> On 02/01/13 11:14, Reuben Thomas wrote:
>
> > Given how long it took how many experts to come up with a valid
> > incantation, it seems to me it *is* a useful documentation example.
>
> Sure, but the valid incantation is a bit confusing, and it's not
> documented correctly (it reverses characters, not bytes).
> As far as I know there's no portable way to use 'tac' to
> reverse a file byte-by-byte.
>

Thanks!

What about a way to do it on a GNU system? It seems reasonable to document
GNU-specific hacks in GNU documentation when a portable solution is not
forthcoming.