Re: arithmetic substitution in while loop in MKS Korn shell
From: David Thompson (dat1965_at_yahoo.com)
Date: Thu, 02 Oct 2003 03:11:45 GMT
"Chris F.A. Johnson" <email@example.com> wrote
> the MKS Korn shell is supposed to be compatible with ksh93.
I don't think that's quite true. MKS provides a subset only,
but I've never seen it fully documented just what this subset
is. For example, ksh93 supports arithmetic expressions using
the (( expr )) syntax,
(( X = X + 1 ))
but MKS most definitely does not.
ksh93 has 1) arithmetic expressions and 2) arithmetic substitutions,
but MKS only has #2, ie,
1) arithmetic expression (( X = X + 1 ))
2) arithmetic substitution X=$(( X + 1 ))
OTOH, I've never seen explicit claims to be a subset of ksh93,
or be compatible with ksh93 either. Ie, this page below never
although it does mention POSIX.2 compatibility.
-- David Thompson Foster City, CA