From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.4 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham
	autolearn_force=no version=3.4.4
Received: (qmail 28825 invoked from network); 26 Mar 2023 23:51:47 -0000
Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368)
  by inbox.vuxu.org with ESMTPUTF8; 26 Mar 2023 23:51:47 -0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org;
	s=rsa-20210803; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:
	List-Subscribe:List-Help:List-Id:Sender:Content-Transfer-Encoding:
	Content-Type:Subject:Cc:To:From:Date:References:In-Reply-To:Message-Id:
	Mime-Version:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:
	Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID;
	bh=bISg549A6oXsSmdSNvCIo65NAi+JLx4gkUWIC4K83R8=; b=MkyAlMosV3iVIfkVH6AUqLQ3Oa
	4abIk1OvQccPct66EhGpnJGwpLVxODSRhJlMiaObfTDEEhL169kjMesn7n1wfO0dWHrduNFrZWgtK
	8Ceqr8l9z0/Q6n5iawU1b3qiy6m5Nzw1S4GT5SFW1A+nu1J6IeMnjGl5oe7S3npjtFXMxdVDGYeTC
	kO3+zh3qTKPIAsonEDb/00ioZBLWlxT8s+4TIUhcNQnjbytb4XAM8mymcKlZinXddGxiX2MTVNGXO
	xdV6ToJXpcKyhhbvPLnJnu0LAVnGeACOnuSePz408kjOzx8jKdNur+3olJOJn858GwnF+WqMuv0Iy
	3D5fJd5A==;
Received: by zero.zsh.org with local
	id 1pga9L-000Ljb-J6;
	Sun, 26 Mar 2023 23:51:47 +0000
Received: by zero.zsh.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256)
	id 1pga8f-000L1A-U9;
	Sun, 26 Mar 2023 23:51:06 +0000
Received: from compute1.internal (compute1.nyi.internal [10.202.2.41])
	by mailauth.nyi.internal (Postfix) with ESMTP id 4883627C0054;
	Sun, 26 Mar 2023 19:51:02 -0400 (EDT)
Received: from imap48 ([10.202.2.98])
  by compute1.internal (MEProxy); Sun, 26 Mar 2023 19:51:02 -0400
X-ME-Sender: <xms:ZtogZG5LLvGbkAh52LQFkiTY3KXaFz6UiqRo7L6q2PUa7WhateMB5w>
    <xme:ZtogZP4N2X0wPPtRG6doejAtjdcsA23l_CGYRv_DGUXi_HUKq1Ca502zwBqS4PgYl
    -FoGbcd5hCQgUZ72g>
X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdehuddgvdejucetufdoteggodetrfdotf
    fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen
    uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne
    cujfgurhepofgfggfkjghffffhvfevufgtgfesthhqredtreerjeenucfhrhhomhepnfgr
    fihrvghntggvucggvghljoiiqhhuvgiiuceolhgrrhhrhihvseiishhhrdhorhhgqeenuc
    ggtffrrghtthgvrhhnpeehgeeiudeigedvvdffvdegfeduudfgtedvtedttdefuddtjeev
    gfejgfevteehudenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfh
    hrohhmpehlrghrrhihvhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidquddu
    hedukeejjedtgedqudduledvjeefkeehqdhlrghrrhihvheppeiishhhrdhorhhgsehfrg
    hsthhmrghilhdrtghomh
X-ME-Proxy: <xmx:ZtogZFeBhbkjsI6Wf1Nf_FlLbrH5gjufPYIPwy8pqLVoQ8scLDemOA>
    <xmx:ZtogZDKoI-P4HpF-qp7mKcW3xWn4vKQAM5pi-YpcYDhKAODEEexvfw>
    <xmx:ZtogZKJNp2VecEId_55q3pK1NkrmSzFQwOB9J-vTTZAMnfD11IysVA>
    <xmx:ZtogZEzSarhN_ko-DWq-VRUzzZYY3bMROVNc8rgykFulOPoihSk6CQ>
Feedback-ID: iaa214773:Fastmail
Received: by mailuser.nyi.internal (Postfix, from userid 501)
	id 0A58631A0063; Sun, 26 Mar 2023 19:51:02 -0400 (EDT)
X-Mailer: MessagingEngine.com Webmail Interface
User-Agent: Cyrus-JMAP/3.9.0-alpha0-236-g06c0f70e43-fm-20230313.001-g06c0f70e
Mime-Version: 1.0
Message-Id: <0ee9e5cd-1595-459f-89ed-e1ca4f4f297c@app.fastmail.com>
In-Reply-To: 
 <CAN=4vMq41u31dp6fnOQ=bYCSsVGWMVPZMenHVS=XaxffZ8ASpg@mail.gmail.com>
References: 
 <CA+rB6GKFf5m0_d+yEtkd7PBqHZdLfa6zEVENW7jDkJ-gV7z4FQ@mail.gmail.com>
 <CAN=4vMpUG2xqpsOFg-o_9LaO_j5eMTFgErjaUfvTQSonqETetQ@mail.gmail.com>
 <CA+rB6GKWVJ2C1pxzykWHMT-GzmcSo0GzBmS0TSAe2PpnOvGxww@mail.gmail.com>
 <CAN=4vMrR2fYk2A0wicn5Fq+LcJdsF=aQ2_t--voFyMeWOK=Vog@mail.gmail.com>
 <CA+rB6G+p9e3c+_oWcihqCWNcWirQyuXFjAWozasRhaZwct6FSA@mail.gmail.com>
 <CAN=4vMq41u31dp6fnOQ=bYCSsVGWMVPZMenHVS=XaxffZ8ASpg@mail.gmail.com>
Date: Sun, 26 Mar 2023 19:50:33 -0400
From: =?UTF-8?Q?Lawrence_Vel=C3=A1zquez?= <larryv@zsh.org>
To: Jim <linuxtechguy@gmail.com>
Cc: "Roman Perepelitsa" <roman.perepelitsa@gmail.com>, zsh-users@zsh.org
Subject: Re: strange interaction between read command and pipe to less from function
Content-Type: text/plain;charset=utf-8
Content-Transfer-Encoding: quoted-printable
X-Seq: 28987
Archived-At: <https://zsh.org/users/28987>
X-Loop: zsh-users@zsh.org
Errors-To: zsh-users-owner@zsh.org
Precedence: list
Precedence: bulk
Sender: zsh-users-request@zsh.org
X-no-archive: yes
List-Id: <zsh-users.zsh.org>
List-Help: <http://www.zsh.org/sympa/help>, <mailto:sympa@zsh.org?subject=HELP>
List-Subscribe: <http://www.zsh.org/sympa/subscribe/zsh-users>, <mailto:sympa@zsh.org?subject=SUB%20zsh-users>
List-Unsubscribe: <http://www.zsh.org/sympa/signoff/zsh-users>, <mailto:sympa@zsh.org?subject=SIG%20zsh-users>
List-Post: <mailto:zsh-users@zsh.org>
List-Owner: <mailto:zsh-users-request@zsh.org>
List-Archive: <http://www.zsh.org/sympa/arc/zsh-users>

On Sun, Mar 26, 2023, at 1:23 PM, Roman Perepelitsa wrote:
> On Sun, Mar 26, 2023 at 7:04=E2=80=AFPM Jim <linux.tech.guy@gmail.com>=
 wrote:
>>
>> Now I'm totally confused.  A bit by your answer and the word 'simulta=
neously'
>> as I thought the function would run first then less.
>
> When you run `cvt_256_colors_2_rgb_hex_fmt | less`, two processes run
> simultaneously. One is executing `cvt_256_colors_2_rgb_hex_fmt`, the
> other is executing `less`.

A demonstration:

	% foo() for arg do print -n $arg >$TTY; done
	% repeat 10 do foo {a..j} | foo {0..9}; echo; done
	0ab1c2d3e4f5gh6i7j89
	0a1b2c3de4f5g6h7i8j9
	01a2b3c4d5e6fg7h8i9j
	0a1bc2de3fgh4ij56789
	01ab2c3d4e5f6g78h9ij
	01a2b34c56d78e9fghij
	0a1bc2de3fgh4ij56789
	ab0cd1ef2gh3ij456789
	a0bc1d2e3f4g5h6i7j89
	0ab1c2d3ef4gh5i6j789

Note the nondeterministic output.

--=20
vq