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From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-users@zsh.org
Subject: Re: kill the LHS command of a pipe once the RHS command terminates
Date: Mon, 29 Jul 2019 17:23:09 +0200	[thread overview]
Message-ID: <20190729152309.GA17940@cventin.lip.ens-lyon.fr> (raw)
In-Reply-To: <20190628110430.GA13790@zira.vinc17.org>

On 2019-06-28 13:04:30 +0200, Vincent Lefevre wrote:
> * With a process substitution:
> 
> zira% head -n 1 <(echo foo; sleep 3; echo err >&2)
> foo
> zira%

Another issue is that if the producer side tries to access the terminal
(e.g. ssh, for a passphrase), all the processes of this side are stopped
due to a SIGTTOU signal.

Concerning the documentation, the zshexpn(1) man page does not say
that a process in process substitution is run in background. Later
there's a mention of it being run asynchronously, but this term has
never been defined.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

  parent reply	other threads:[~2019-07-29 15:24 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-28 11:04 Vincent Lefevre
2019-06-28 11:38 ` Vincent Lefevre
2019-06-29 16:17 ` Bart Schaefer
2019-07-06 23:55   ` Vincent Lefevre
2019-07-07  4:54     ` Bart Schaefer
2019-07-09 10:08       ` Vincent Lefevre
2019-07-09 10:54         ` Vincent Lefevre
2019-07-29 15:23 ` Vincent Lefevre [this message]
2019-07-29 15:54   ` Bart Schaefer
2019-07-29 20:48     ` Vincent Lefevre
2019-07-30  0:00       ` Bart Schaefer
2019-07-30  0:17         ` Vincent Lefevre
     [not found] <20190628110430.GA13790__36317.6205357135$1561719956$gmane$org@zira.vinc17.org>
2019-06-28 18:41 ` Stephane Chazelas
2019-06-29  1:24   ` Vincent Lefevre
2019-06-29 15:30     ` Stephane Chazelas
2019-07-06 23:49       ` Vincent Lefevre
2019-07-29 23:08         ` Vincent Lefevre
2019-07-29 23:15           ` Vincent Lefevre
2019-07-29 23:42             ` Bart Schaefer
2019-07-30  0:40               ` Vincent Lefevre

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