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Home > Archive > Unix Shell > February 2006 > negation of pipeline (was: ((...)) vs [...])
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negation of pipeline (was: ((...)) vs [...])
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| Sven Mascheck 2006-02-27, 8:48 pm |
| 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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| Stephane CHAZELAS 2006-02-28, 7:51 am |
| 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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