> About supporting both BSD and System V style options in a single
> executable: please take into consideration that there are at least
> three command line options (-e, -p, -u) whose use differs between
> 'our' BSD implementation and System V.

Well, we could at least do what AIX did: support BSD options if you
don't supply a dash, and support System V options if you do.

It still wouldn't be fully compatible, though, so we still have a
tough choice to make.