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To: Dan Nelson <dnelson@allantgroup.com>
Cc: zsh-workers@sunsite.dk
Subject: Re: local variable assignment and pipelines?
References: <20030718215801.GB37697@dan.emsphone.com>
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From: Philippe Troin <phil@fifi.org>
Date: 18 Jul 2003 16:20:49 -0700
In-Reply-To: <20030718215801.GB37697@dan.emsphone.com>
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Sender: Philippe Troin <phil@fifi.org>

Dan Nelson <dnelson@allantgroup.com> writes:

> a=1 | echo $a      -> prints "1" on zsh, prints nothing on ash,pdksh,bash

Even more fascinating:

% a=0; b=0; cat < /dev/null | a=1 | b=1 | cat; echo $a $b      
1 1                                         

Reassuring:

% a=0; b=0; cat < /dev/null | {a=1; while read i; do echo $i; done} | b=1 | cat; echo $a $b 
0 1

Phil.