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Re: exec | wc isn't very useful...
- X-seq: zsh-users 8301
- From: Anthony Heading <aheading@xxxxxxxxxxxx>
- To: Peter Stephenson <pws@xxxxxxx>
- Subject: Re: exec | wc isn't very useful...
- Date: Wed, 15 Dec 2004 17:51:46 -0500
- Cc: zsh-users@xxxxxxxxxx
- In-reply-to: <200412151918.iBFJI1F5008660@xxxxxxxxxxxxxx>
- Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
- References: <20041215185920.GA24992@xxxxxxxxxxxxxxxxxxxxxxx> <200412151918.iBFJI1F5008660@xxxxxxxxxxxxxx>
On Wed, Dec 15, 2004 at 07:18:00PM +0000, Peter Stephenson wrote:
> > exec | wc
> The syntax doesn't make sense. You're piping the output of "exec" on
> its own, which doesn't do anything, to "wc".
Yes... doesn't that just mean that it's free to be assigned any
meaning that an implementer might care to give it?
> Try this:
> exec > >(wc)
> Something like this got broken at one point (by me) but is working in
> the latest version of the shell.
Ah. Perfect. I'm sure tried that before and it didn't work -
perhaps I hit the period when it was broken...
> A pipeline is fundamentally different from a redirection.
I don't quite see that - aside from the very real underlying
implementation issues, what is wrong with a conceptual model
a | b | c
as pure syntactic sugar for:
a > >(b > >(c))
Would it not be appealing to _define_
exec | wc
exec > >(wc)
given that it doesn't currently mean anything at all?
Regardless, appreciate your help with identifying a working
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