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From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-workers@zsh.org
Subject: pipeline that cannot be interrupted (was: Ctrl-\ while executing a pipeline made zsh quit)
Date: Tue, 26 Apr 2022 11:18:33 +0200	[thread overview]
Message-ID: <20220426091833.GE100943@zira.vinc17.org> (raw)
In-Reply-To: <20220426090722.GD100943@zira.vinc17.org>

On 2022-04-26 11:07:22 +0200, Vincent Lefevre wrote:
> I wasn't using "mless" in that way, though this may be related to
> what I got. Anyway, I think that this is a bug in zsh; this issue
> is also reproducible with "head -n 1" instead of "less".

Or even simpler:

zira:~> ( zsh -fc 'print a few words; /bin/sleep 10' ) | { head -n 1 }
a few words

(the curly brackets are important).

I think that's the same issue I had reported in 2019, for which I got
no replies:

Date: Fri, 2 Aug 2019 16:51:06 +0200
From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-workers@zsh.org
Subject: [BUG] pipeline that cannot be interrupted with Ctrl-C (regression)

With zsh 5.7.1 under Debian, the following pipeline cannot be
interrupted with Ctrl-C:

  { /bin/sleep 10 ; /bin/sleep 20; } | { /bin/sleep 30 ; /bin/sleep 40; }

But if I remove one of the sleep, it can be interrupted by Ctrl-C.

There was no issue with zsh 5.3.1 (Debian 9).

Note: I mentioned this example in zsh-users in the thread
"kill the LHS command of a pipe once the RHS command terminates".


Neither Ctrl-C nor Ctrl-\ has any effect.

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)

  reply	other threads:[~2022-04-26  9:18 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26  0:36 Ctrl-\ while executing a pipeline made zsh quit Vincent Lefevre
2022-04-26  0:44 ` Vincent Lefevre
2022-04-26  1:24 ` Bart Schaefer
2022-04-26  3:00   ` Vincent Lefevre
2022-04-26  4:05     ` Bart Schaefer
2022-04-26  9:07       ` Vincent Lefevre
2022-04-26  9:18         ` Vincent Lefevre [this message]
2022-04-26 10:07           ` pipeline that cannot be interrupted Vincent Lefevre
2022-04-27 20:07             ` Bart Schaefer
2022-04-27 20:29               ` Bart Schaefer
2022-04-29  0:24                 ` Bart Schaefer

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