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bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin
From: |
Sean Whitton |
Subject: |
bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin |
Date: |
Sun, 26 Jun 2022 14:11:45 -0700 |
User-agent: |
Notmuch/0.36 Emacs/29.0.50 (x86_64-pc-linux-gnu) |
Hello,
On Sun 26 Jun 2022 at 10:22AM -07, Jim Porter wrote:
> On 6/26/2022 10:12 AM, Sean Whitton wrote:
>> On Fri 24 Jun 2022 at 04:03pm -07, Jim Porter wrote:
>>
>>> When [EOF is] received, all the bytes waiting to be read are
>>> immediately passed to the process without waiting for a <newline>, and
>>> the EOF is discarded. Thus, if there are no bytes waiting (that is,
>>> the EOF occurred at the beginning of a line), a byte count of zero
>>> shall be returned from the read(), representing an end-of-file
>>> indication.
>>>
>>> I interpret that to mean that the preferred way to indicate end-of-file
>>> to `rev' in this case is to send it "hi [NL] [EOF]". The second EOF that
>>> Eshell sends when closing the stderr output handle is superfluous, but
>>> it works fine as far as I can tell.
>>>
>>> [1] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap11.html
>>
>> The text states unconditionally that when an EOF is received it is
>> discarded by the OS. So we can infer that it's fine to send three,
>> according to the standard -- it's not just that it happens to work.
>>
>> Thanks again for working on this.
>
> Ah, good catch. I glossed over the last sentence in that paragraph in
> the spec (hence why I didn't copy-paste it).
I was actually thinking it was implied by the first sentence of what you
quoted.
--
Sean Whitton
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, (continued)
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Eli Zaretskii, 2022/06/24
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/24
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Sean Whitton, 2022/06/24
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/24
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Eli Zaretskii, 2022/06/25
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/25
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Eli Zaretskii, 2022/06/25
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Lars Ingebrigtsen, 2022/06/26
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Sean Whitton, 2022/06/26
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/26
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin,
Sean Whitton <=
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Ken Brown, 2022/06/27
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Michael Albinus, 2022/06/27
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Ken Brown, 2022/06/27
- bug#56025: [EXT]Re: bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Sean Whitton, 2022/06/27
- bug#56025: [EXT]Re: bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Ken Brown, 2022/06/27
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/27
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Ken Brown, 2022/06/27
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/30
- bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin, Jim Porter, 2022/06/30