From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-31397-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 14790 invoked by alias); 13 May 2013 15:27:38 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 31397
Received: (qmail 23719 invoked from network); 13 May 2013 15:27:32 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,
	T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.3.2
Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.214.51 as permitted sender)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=x-received:date:from:to:subject:message-id:mail-followup-to
         :mime-version:content-type:content-disposition:user-agent;
        bh=QUvXGquQRo+AQ7vkhBPYzQybKL6RgpxB+crul9ovZJU=;
        b=bEnJa45/VoUY1BYIDofdhRcvrcPdMzpHrkaMbEx8lX6dzSUdh0888fcxZWDW//r7re
         VrKLqxjlu+dy+ElENm1UhqQ9yOOogCmnBJCvv7rGBuat2jjoxL3mR7BrlpJNXSevdjfc
         CRWOWxjNC/TywBGbcfdvbXh6OhZY4+yITTXFJ7zRZBhJrAIxWBnu7BIjptcmM+/BFrhh
         +/gxLbPyHhb9dLpPt5WVQEYN52Bnl0Ym2DpY/N3gM/0IUpEivGQ6cLlTN6NSdXbDHOWO
         ccKl6U/VDm/EeQ4Oi8IUqNsGoKP7i0GUygNgmU+hDjVC7bRLlTPso/kw6pBCLPBG/Ywt
         mYDg==
X-Received: by 10.204.195.67 with SMTP id eb3mr5801083bkb.107.1368458843437;
        Mon, 13 May 2013 08:27:23 -0700 (PDT)
Date: Mon, 13 May 2013 16:27:20 +0100
From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: zsh-workers@zsh.org
Subject: zpty -r and pipes
Message-ID: <20130513152720.GA10320@chaz.gmail.com>
Mail-Followup-To: zsh-workers@zsh.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.21 (2010-09-15)

$ zsh -c 'zmodload zsh/zpty; zpty E echo test; zpty -r E'
test

But if I pipe it to anything:

$ zsh -c 'zmodload zsh/zpty; zpty E echo test; zpty -r E | cat'
$

No output.

Those are fine though:

$ zsh -c 'zmodload zsh/zpty; zpty E echo test; echo $(zpty -r E)'
test
$ zsh -c 'zmodload zsh/zpty; zpty E echo test; {zpty -r E} | cat'
test


Sounds like some bug in fd management.

$ zsh --version
zsh 5.0.2 (x86_64-unknown-linux-gnu)

-- 
Stephane