From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-7556-mason-zsh=primenet.com.au@sunsite.dk>
Received: (qmail 11715 invoked from network); 17 Jun 2004 13:58:00 -0000
Received: from thor.dotsrc.org (HELO a.mx.sunsite.dk) (130.225.247.86)
  by ns1.primenet.com.au with SMTP; 17 Jun 2004 13:58:00 -0000
Received: (qmail 25625 invoked from network); 17 Jun 2004 13:57:13 -0000
Received: from sunsite.dk (130.225.247.90)
  by a.mx.sunsite.dk with SMTP; 17 Jun 2004 13:57:13 -0000
Received: (qmail 3467 invoked by alias); 17 Jun 2004 13:56:49 -0000
Mailing-List: contact zsh-users-help@sunsite.dk; run by ezmlm
Precedence: bulk
X-No-Archive: yes
X-Seq: 7556
Received: (qmail 3456 invoked from network); 17 Jun 2004 13:56:49 -0000
Received: from thor.dotsrc.org (HELO a.mx.sunsite.dk) (qmailr@130.225.247.86)
  by sunsite.dk with SMTP; 17 Jun 2004 13:56:46 -0000
Received: (qmail 23858 invoked from network); 17 Jun 2004 13:56:11 -0000
Received: from madrid10.amenworld.com (62.193.203.32)
  by a.mx.sunsite.dk with SMTP; 17 Jun 2004 13:56:10 -0000
Received: from DervishD.pleyades.net (212.Red-80-35-44.pooles.rima-tde.net [80.35.44.212])
	by madrid10.amenworld.com (8.10.2/8.10.2) with ESMTP id i5HDu2d09154
	for <zsh-users@sunsite.dk>; Thu, 17 Jun 2004 15:56:03 +0200
Received: from raul@pleyades.net by DervishD.pleyades.net with local (Exim MTA 2.05)
	  id <1BaxLj-0005r3-00>; Thu, 17 Jun 2004 15:54:39 +0200
Date: Thu, 17 Jun 2004 15:54:39 +0200
From: DervishD <raul@pleyades.net>
To: Zsh Users <zsh-users@sunsite.dk>
Subject: Double input and 'exec' builtin
Message-ID: <20040617135439.GA22462@DervishD>
Mail-Followup-To: Zsh Users <zsh-users@sunsite.dk>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
User-Agent: Mutt/1.4.2.1i
Organization: Pleyades
X-Spam-Checker-Version: SpamAssassin 2.63 on a.mx.sunsite.dk
X-Spam-Level: 
X-Spam-Status: No, hits=0.0 required=6.0 tests=none autolearn=no version=2.63
X-Spam-Hits: 0.0

    Hi all :)

    I have a script that processes standard input and after that
prints some data and waits for user input, something like:

    #!/bin/zsh

    emulate -L zsh

    select ITEM in `filter`
    do
        print $ITEM
        break;
    done

    # End of script

    Obviously this doesn't work, because 'select' needs standard
input (or the line editor) to read the user selection, but 'filter'
processes standard input as well!. Well, I've modified it like this:

    #!/bin/zsh

    emulate -L zsh

    set `filter`

    select ITEM
    do
        print $ITEM
        break;
    done

    # End of script

    thus separating the filter processing from the selection, but it
doesn't work either. I need to do the following in order to make it
work:

    #!/bin/zsh

    emulate -L zsh

    set `filter`

    exec < /dev/tty
    select ITEM
    do
        print $ITEM
        break;
    done

    # End of script

    Is there any cleaner way of doing all this? I want to solve two
problems. First, the 'set' part. I don't really want to use the
positional parameters for this, although they won't be used in this
script. I've thought about using a shell parameter instead of 'set'
and positional parameters, and using ${(f)that_variable} for
generating the list for 'select'. The other problem is separating the
part of the script that processes standard input from the select,
without making two scripts and without that 'exec'.

    Any idea? Thanks a lot for your help :)

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736
http://www.pleyades.net & http://raul.pleyades.net/