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From: Bart Schaefer <schaefer@brasslantern.com>
To: "Jun. T" <takimoto-j@kba.biglobe.ne.jp>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: ZSH performance regression in 5.8.1.2-test
Date: Tue, 26 Apr 2022 17:38:55 -0700	[thread overview]
Message-ID: <CAH+w=7aJVHyRXP6zjgOqQ6jmRsFNFxt_sirnod2a30kUuAwVww@mail.gmail.com> (raw)
In-Reply-To: <7E5CB0D9-4740-486A-B55E-6EA0530532F9@kba.biglobe.ne.jp>

On Tue, Apr 26, 2022 at 7:37 AM Jun. T <takimoto-j@kba.biglobe.ne.jp> wrote:
>
> But at least on my Mac the following seems to work also:
>
>     if (lseek(SHIN, 0, SEEK_CUR) == 0)
>           rsize = SHINBUFSIZE;
>
> # Have you found a case in which lseek(SHIN, 0, SEEK_CUR) fails
> # when it shouldn't fail, or does not fail when it should fail?

I was pretty sure I'd found a case (on Ubuntu 20.04) where it
succeeded on a pipe when there was already data written to the pipe
before the seek was attempted.  That was only/exactly for (0,
SEEK_CUR).

However, I can check that again.  If that is the false-success mode,
it won't be tested by PWS's little C program in workers/50108


  parent reply	other threads:[~2022-04-27  0:39 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-25 18:16 Jordan Patterson
2022-04-25 18:56 ` Bart Schaefer
2022-04-25 19:20   ` Stephane Chazelas
2022-04-25 21:27     ` Bart Schaefer
2022-04-26  7:01       ` Bart Schaefer
2022-04-26  8:31         ` Peter Stephenson
2022-04-27  0:33           ` Bart Schaefer
2022-04-27 14:11           ` Stephane Chazelas
2022-04-27 15:02             ` Bart Schaefer
2022-04-27 15:07               ` Peter Stephenson
2022-04-27 15:17                 ` Bart Schaefer
2022-04-26 14:31         ` Jun. T
2022-04-26 15:15           ` Peter Stephenson
2022-04-27  0:55             ` Bart Schaefer
2022-04-27  9:16               ` Jun T
2022-04-27  0:38           ` Bart Schaefer [this message]
2022-04-27  9:34             ` Peter Stephenson
2022-04-27 10:28               ` Jun T
2022-04-27 12:42                 ` Jun T
2022-04-27 13:58                 ` Jun T
2022-04-27 15:25                   ` Bart Schaefer
2022-04-27 16:18                     ` Jun. T
2022-04-27 19:54         ` Jordan Patterson
2022-04-28  9:53           ` Jun T
2022-04-28 14:56             ` Bart Schaefer
2022-04-28 18:51           ` Jun. T
2022-04-29  0:28             ` Bart Schaefer
2022-04-29  2:25               ` Jun. T
2022-04-26  1:08 ` Bart Schaefer
2022-04-26  3:03   ` Jordan Patterson

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