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From: dml@rabbit1.UUCP (David Langdon)
Newsgroups: net.unix,net.unix-wizards
Subject: Re: sh changes
Message-ID: <172@rabbit1.UUCP>
Date: Thu, 19-Jun-86 17:59:08 EDT
Article-I.D.: rabbit1.172
Posted: Thu Jun 19 17:59:08 1986
Date-Received: Sat, 21-Jun-86 11:52:54 EDT
References: <18951@rochester.ARPA>
Organization: Rabbit Software Corp., Malvern PA
Lines: 29
Xref: watmath net.unix:8283 net.unix-wizards:18517

> 
>      ${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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