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Re: coprocesses and bc

X-seq: zsh-users 1023
From: Peter Stephenson <pws@xxxxxx>
To: Matthias Kopfermann <fk5a005@xxxxxxxxxxxxxxxxxx>, zsh-users@xxxxxxxxxxxxxxx (Zsh users list)
Subject: Re: coprocesses and bc
Date: Mon, 15 Sep 1997 10:10:56 +0200
In-reply-to: "Matthias Kopfermann"'s message of "Mon, 15 Sep 1997 09:10:14 MET." <199709150710.JAA17846@xxxxxxxxxxxxxxxxxxxxxxxxxx>

Matthias Kopfermann wrote:
> coproc bc
> 
> print -p "23*34"
> 
> read -p erg
> echo $erg
> 
> 
> my zsh (linux 2.029) sticks with read -p erg.
> nothing is moving.

Try the following experiment: type 'bc | cat' at the keyboard,
then the sum on the following line.  If you don't get a message back
straight away, bc is buffering output when it's not going to a terminal.
My guess is that this is happening in Linux and not on your AIX machine.
If that's right, then it's not a shell problem (phew).  This would
certainly reflect my experience comparing Irix with SunOS 4.

-- 
Peter Stephenson <pws@xxxxxx>       Tel: +49 33762 77366
WWW:  http://www.ifh.de/~pws/       Fax: +49 33762 77413
Deutsches Elektronen-Synchrotron --- Institut fuer Hochenergiephysik Zeuthen
DESY-IfH, Platanenallee 6, 15738 Zeuthen, Germany.

References:
- coprocesses and bc
  - From: Matthias Kopfermann

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