From: Rob Pike <robpike@gmail.com>
To: George Michaelson <ggm@algebras.org>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Why does shell write to stderr?
Date: Fri, 8 Apr 2022 09:51:18 +1000 [thread overview]
Message-ID: <CAKzdPgzvWasb9gatMvoQT+EgQn65Ff+qbMK1tThdFr_D5qNSgg@mail.gmail.com> (raw)
In-Reply-To: <CAKr6gn0Nhn+YDtrmu_3SEphC_L879vcmvB_qkQUm8NPfJ-ND7A@mail.gmail.com>
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If you never ring the bell in the editor, the issue never comes up, the
code is simpler, and there's less to understand.
-rob
On Fri, Apr 8, 2022 at 8:33 AM George Michaelson <ggm@algebras.org> wrote:
> I also had extreme WTF the first time I looked in code and saw an
> isatty() guard over some activity.
>
> "this program processes stdin to stdout, except.. if I decide
> otherwise" never appeared in man pages.
>
> But that said, it sort of made sense. Why ring bell in an editor, if
> you know the input pipe side can't hear it? A tty is a rather strange
> device being the join over stdout, stdin and stderr, and there is a
> (tiny?) set of things which need to know.
>
> more for instance, probably needs to know that waiting for a command
> to move pagination onward if there is no controlling terminal is not
> sensible. If you want your input in chunks, more is not the way to do
> it.
>
> I hate special cases. This is why people say english is so hard to
> learn but really all languages have them, its just that english having
> stolen words from everywhere has more instances of isatty() than
> others.
>
> -G
>
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next prev parent reply other threads:[~2022-04-07 23:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 21:11 Douglas McIlroy
2022-04-07 21:32 ` Steffen Nurpmeso
2022-04-07 21:36 ` Richard Salz
2022-04-07 22:15 ` Rob Pike
2022-04-07 22:30 ` George Michaelson
2022-04-07 23:51 ` Rob Pike [this message]
2022-04-09 1:46 ` John Cowan
2022-04-09 1:53 ` George Michaelson
2022-04-09 18:05 ` Steffen Nurpmeso
-- strict thread matches above, loose matches on Subject: below --
2022-04-08 9:34 Paul Ruizendaal via TUHS
2022-04-07 17:45 Richard Salz
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