sh changes

[David Langdon]

> 
>      ${parameter:-word}
 ...
>      ${parameter:=word}
 ...
>      ${parameter:?word}
 ...
>      ${parameter:+word}
 ...
> 
> In case you missed it, the difference is the extra colon in the Sun 3.0
> system. Questions: when and why was this change made?  Are there any
> other variants of Unix with this change? Has anybody's command file
> broken on account of this?
> 
> 	Ken

Don't know the real answer to this, but from what ksh (korn shell)
documentation I have seen, the Sun 3.0 sh uses the same syntax as the
korn shell (which is supposed to be sh compatible).

-- 
-----------------------------------------------------------
David Langdon    Rabbit Software Corp.

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