From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-users@zsh.org
Subject: Re: less with subprocess
Date: Thu, 30 Sep 2021 21:17:06 +0200 [thread overview]
Message-ID: <20210930191706.GA1641202@zira.vinc17.org> (raw)
In-Reply-To: <CAH+w=7an7ATJ51o-67ztFX+ShfEbrf158+Xi7OPtrm0X82vSbg@mail.gmail.com>
On 2021-09-29 07:14:23 -0700, Bart Schaefer wrote:
> On Wed, Sep 29, 2021 at 6:02 AM Vincent Lefevre <vincent@vinc17.net> wrote:
> >
> > cventin% LF () { () { cat >$1 &! less $1 ; kill $! } =(:) }
> > cventin% echo | LF
> > (anon):kill: kill 27684 failed: no such process
>
> Yeah, if you use it with a process that produces very little output,
> the kill will fail. But there's no point in using it in that case.
You don't always know in advance whether there will be little output.
And even with a lot of output, "kill" fails. Basically, the "cat" will
terminate as soon as the command terminates (there is no blocking due
to buffering like with a pipe).
There's another major issue: since there is no blocking, this can take
much disk space. Thus such a function must not be used in a case one
may be interested only in the beginning of the output.
> Redirect stderr of kill if this bothers you.
This won't solve the issue that "kill" may kill an arbitrary process.
I'd say that my patch on "less" provides a better solution.
--
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)
next prev parent reply other threads:[~2021-09-30 19:18 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 20:30 Pier Paolo Grassi
2021-09-27 20:46 ` Roman Perepelitsa
2021-09-27 21:38 ` Bart Schaefer
2021-09-27 21:48 ` Bart Schaefer
2021-09-27 22:57 ` Pier Paolo Grassi
2021-09-27 23:05 ` Bart Schaefer
2021-09-27 23:28 ` Pier Paolo Grassi
2021-09-27 23:31 ` Dominik Vogt
2021-09-28 0:41 ` Bart Schaefer
2021-09-28 0:53 ` Bart Schaefer
2021-09-28 18:52 ` Dominik Vogt
2021-09-28 19:29 ` Bart Schaefer
2021-09-29 13:02 ` Vincent Lefevre
2021-09-29 13:13 ` Pier Paolo Grassi
2021-09-29 13:26 ` Vincent Lefevre
2021-09-29 14:14 ` Bart Schaefer
2021-09-29 14:47 ` Pier Paolo Grassi
2021-09-29 17:56 ` Bart Schaefer
2021-09-30 19:22 ` Vincent Lefevre
2021-10-01 16:44 ` Bart Schaefer
2021-10-03 1:45 ` Vincent Lefevre
2021-10-03 21:41 ` Bart Schaefer
2021-09-30 19:17 ` Vincent Lefevre [this message]
2021-09-30 19:48 ` Dominik Vogt
2021-09-30 20:59 ` Pier Paolo Grassi
2021-09-30 21:03 ` Pier Paolo Grassi
2021-09-30 22:39 ` Bart Schaefer
2021-09-30 22:46 ` Pier Paolo Grassi
2021-09-30 23:46 ` Dominik Vogt
2021-10-01 0:04 ` Pier Paolo Grassi
2021-10-01 0:06 ` Pier Paolo Grassi
2021-10-01 0:31 ` Dominik Vogt
2021-10-01 1:32 ` Pier Paolo Grassi
2021-10-01 0:17 ` Dominik Vogt
2021-10-01 2:47 ` Vincent Lefevre
2021-09-29 12:51 ` Vincent Lefevre
2021-09-28 19:50 ` Pier Paolo Grassi
2021-09-27 21:38 ` Dominik Vogt
2021-09-27 22:35 ` Dominik Vogt
2021-09-27 23:03 ` Bart Schaefer
2021-09-29 12:24 ` Vincent Lefevre
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