From: Daniele Nicolodi <daniele@grinta.net>
To: emacs-devel@gnu.org
Subject: Re: `message' not outputting the newline "atomically"
Date: Mon, 1 Jul 2019 19:01:18 +0200 [thread overview]
Message-ID: <ed92dda5-315f-8202-ebea-6cc02178d773@grinta.net> (raw)
In-Reply-To: <83woh1es3x.fsf@gnu.org>
On 01/07/2019 08:39, Eli Zaretskii wrote:
> More importantly, I think you are missing the main point here:
>
>> I don't think this would be affected in any way by line buffering
>> stderr.
>
> See, this is incorrect. The problem with line buffering is that you
> see nothing at all until the newline is processed. By contrast, an
> unbuffered stream will output the text piecemeal as it is processed,
> so if the program is killed half way through printing a line, you will
> see more of the line with unbuffered stream than with line buffering,
> even if the line ends with a newline. How much more of that line you
> will see depends on the details: the format string (if the output was
> generated by the likes of fprintf), the internal implementation
> details of the stdio facilities, etc. But in general you can expect
> to see more, and those additional few characters are sometimes
> invaluable in debugging a problem, especially when you cannot
> reproduce it at will, or not at all (imagine a bug report from another
> user).
I think you didn't understand my point, and your selective quoting makes
me thing you are trying to warp what i wrote in your favor. I was
arguing that in the case of a fprintf() with a format string that ends
in a new line there is no way to obtain a partial output, with stderr
unbuffered or line buffered. On any sane implementation of the c library
Either you will get it all or nothing. If you don't think this is the
case I would like to know in what circumstances this does not hold true
and how those apply to Emacs.
Cheers,
Dan
next prev parent reply other threads:[~2019-07-01 17:01 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-19 14:12 `message' not outputting the newline "atomically" Lars Ingebrigtsen
2019-06-19 14:28 ` Andreas Schwab
2019-06-19 15:41 ` Eli Zaretskii
2019-06-19 15:47 ` Lars Ingebrigtsen
2019-06-19 16:05 ` Andreas Schwab
2019-06-19 23:22 ` Paul Eggert
2019-06-20 2:35 ` Eli Zaretskii
2019-06-20 7:47 ` Paul Eggert
2019-06-20 9:35 ` Lars Ingebrigtsen
2019-06-20 12:52 ` Eli Zaretskii
2019-06-20 12:55 ` Lars Ingebrigtsen
2019-06-20 13:13 ` Eli Zaretskii
2019-06-20 14:05 ` Andreas Schwab
2019-06-20 16:26 ` Paul Eggert
2019-06-20 16:45 ` Eli Zaretskii
2019-06-20 17:41 ` Paul Eggert
2019-06-20 18:06 ` Eli Zaretskii
2019-06-20 19:33 ` Paul Eggert
2019-06-21 5:46 ` Eli Zaretskii
2019-06-21 6:06 ` Eli Zaretskii
2019-06-22 0:20 ` Paul Eggert
2019-06-22 7:32 ` Eli Zaretskii
2019-06-22 19:14 ` Paul Eggert
2019-06-23 2:25 ` Eli Zaretskii
2019-06-23 8:34 ` Paul Eggert
2019-06-23 11:37 ` Lars Ingebrigtsen
2019-06-23 14:47 ` Eli Zaretskii
2019-06-23 17:32 ` Paul Eggert
2019-06-23 18:28 ` Eli Zaretskii
2019-06-23 12:53 ` Stefan Monnier
2019-06-23 14:51 ` Eli Zaretskii
2019-06-24 4:09 ` Stefan Monnier
2019-06-22 8:26 ` Andreas Schwab
2019-06-22 18:53 ` Paul Eggert
2019-06-22 19:00 ` Eli Zaretskii
2019-06-22 19:15 ` Paul Eggert
2019-06-22 19:48 ` Andreas Schwab
2019-06-20 13:32 ` Stefan Monnier
2019-06-20 16:28 ` Paul Eggert
2019-06-23 18:59 ` Daniele Nicolodi
2019-06-23 20:34 ` Paul Eggert
2019-06-23 20:42 ` Lars Ingebrigtsen
2019-06-23 21:00 ` Paul Eggert
2019-06-23 22:18 ` Lars Ingebrigtsen
2019-06-23 20:48 ` Daniele Nicolodi
2019-06-24 2:32 ` Eli Zaretskii
2019-06-24 2:51 ` HaiJun Zhang
2019-06-24 19:48 ` Lars Ingebrigtsen
2019-06-24 20:03 ` Daniele Nicolodi
2019-06-24 20:17 ` Lars Ingebrigtsen
2019-06-24 21:11 ` Paul Eggert
2019-06-24 21:33 ` Lars Ingebrigtsen
2019-06-24 22:03 ` Paul Eggert
2019-06-24 22:06 ` Paul Eggert
2019-06-24 22:28 ` Lars Ingebrigtsen
2019-06-24 22:47 ` Lars Ingebrigtsen
2019-06-25 16:03 ` Eli Zaretskii
2019-06-26 9:15 ` Lars Ingebrigtsen
2019-06-26 15:22 ` Eli Zaretskii
2019-06-27 10:52 ` Lars Ingebrigtsen
2019-06-26 18:27 ` Paul Eggert
2019-06-26 18:41 ` Eli Zaretskii
2019-06-26 18:58 ` Paul Eggert
2019-06-26 19:11 ` Eli Zaretskii
2019-06-26 19:36 ` Daniele Nicolodi
2019-06-27 2:34 ` Eli Zaretskii
2019-06-27 5:43 ` Paul Eggert
2019-06-30 20:11 ` Daniele Nicolodi
2019-07-01 7:41 ` Daniele Nicolodi
2019-07-01 14:39 ` Eli Zaretskii
2019-07-01 17:01 ` Daniele Nicolodi [this message]
2019-07-02 2:28 ` Eli Zaretskii
2019-07-02 7:58 ` Daniele Nicolodi
2019-07-02 14:47 ` Eli Zaretskii
2019-07-02 20:56 ` Daniele Nicolodi
2019-07-03 5:23 ` Eli Zaretskii
2019-07-01 17:03 ` Daniele Nicolodi
2019-07-02 2:26 ` Eli Zaretskii
2019-06-26 19:38 ` Paul Eggert
2019-06-25 16:06 ` Eli Zaretskii
2019-06-26 9:21 ` Lars Ingebrigtsen
2019-06-26 15:23 ` Eli Zaretskii
2019-06-27 11:03 ` Lars Ingebrigtsen
2019-06-27 13:31 ` Eli Zaretskii
2019-06-28 8:30 ` Lars Ingebrigtsen
2019-07-03 7:31 ` Paul Eggert
2019-07-03 7:41 ` Eli Zaretskii
2019-07-03 7:47 ` Eli Zaretskii
2019-07-03 7:57 ` Eli Zaretskii
2019-07-03 8:45 ` Paul Eggert
2019-07-03 9:30 ` Eli Zaretskii
2019-07-03 23:08 ` Paul Eggert
2019-07-04 13:24 ` Eli Zaretskii
2019-07-07 1:16 ` Paul Eggert
2019-07-07 14:51 ` Eli Zaretskii
2019-07-08 22:35 ` Richard Copley
2019-07-09 2:33 ` Eli Zaretskii
2019-07-09 13:45 ` Richard Copley
2019-07-09 15:16 ` Eli Zaretskii
2019-07-09 2:47 ` Paul Eggert
2019-07-09 16:39 ` Eli Zaretskii
2019-07-09 18:12 ` Paul Eggert
2019-07-09 18:32 ` Eli Zaretskii
2019-07-09 18:44 ` Lars Ingebrigtsen
2019-07-09 19:17 ` Eli Zaretskii
2019-07-14 0:42 ` Paul Eggert
2019-07-14 6:01 ` Eli Zaretskii
2019-06-25 16:08 ` Eli Zaretskii
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