Stephane CHAZELAS wrote:
> 2006-11-1, 13:14(-08), Yakov:
> > I'm looking for the flag (in bash or ksh or zsh) that disables all
> > extensions above posix and make shell strictly posix-compliant
> > (without any additions).
> >
> > I found '--posix' flag of bash, but it's something different:
> > it doesn't seem to disable bash-specific extensions. It
> > "Changes the behavior of bash where the default operation *differs*
> > from the POSIX". For example, the ((...)) construct is still
> > interpreted
> > with --posix.
> >
> > So, is there "restrict to posix" flag to bash/ksg/zsh ? (I don't have
> > ash)
> [...]
>
> posh (Policy-compliant Ordinary SHell, based on pdksh) is an
> attempt at writing a shell with as few extensions as possible.
> That's probably the closest you can get for your requirement.

posh turns out to be the true answer to my question.
Thanks Stéphane, you did it again.

Yakov