negation of pipeline (was: ((...)) vs [...])
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    negation of pipeline (was: ((...)) vs [...])  
Sven Mascheck


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02-28-06 01:48 AM

Stephane Chazelas wrote:
> Dan Mercer wrote: 
[vbcol=seagreen] 
[vbcol=seagreen] 
[vbcol=seagreen] 

I don't know any Bourne shell which implements it.

[vbcol=seagreen] 
[vbcol=seagreen] 
[vbcol=seagreen]
> It might or might not work with ksh88, will depend on the version
> and implementation. It will work with POSIX conformant ones.

It was apparently introduced with ksh88-e (however, i can't find
anything related in its changelog.)   HP-UX 8 and 9 /bin/posix/sh
is older (88c) - that's the only exception i know.

(BTW, this was added to ash on 4.4BSDalpha, thus it's
also available in all ash variants aiming at POSIX.
bash and pdksh probably had it almost since birth.)





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    Re: negation of pipeline (was: ((...)) vs [...])  
Stephane CHAZELAS


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02-28-06 12:51 PM

2006-02-27, 21:50(+01), Sven Mascheck:
[...] 
>
> I don't know any Bourne shell which implements it.

Ah OK, IDNRC, then. I thought you mentionned it once, sorry.
 
> 
> 
>
> It was apparently introduced with ksh88-e (however, i can't find
> anything related in its changelog.)   HP-UX 8 and 9 /bin/posix/sh
> is older (88c) - that's the only exception i know.
>
> (BTW, this was added to ash on 4.4BSDalpha, thus it's
>  also available in all ash variants aiming at POSIX.
>  bash and pdksh probably had it almost since birth.)

And zsh (at least 2.00.01 already had it, that must have been
around 1991).

--
Stéphane





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