From: ludo@gnu.org (Ludovic Courtès)
To: Andy Wingo <wingo@igalia.com>
Cc: 30066@debbugs.gnu.org
Subject: bug#30066: 'get-bytevector-some' returns only 1 byte from unbuffered ports
Date: Fri, 16 Feb 2018 14:19:50 +0100 [thread overview]
Message-ID: <87sha1nkax.fsf@gnu.org> (raw)
In-Reply-To: <87zi5hmqep.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Sat, 13 Jan 2018 21:53:34 +0100")
ludo@gnu.org (Ludovic Courtès) skribis:
> Andy Wingo <wingo@igalia.com> skribis:
>
>> On Fri 12 Jan 2018 11:15, ludo@gnu.org (Ludovic Courtès) writes:
>>
>>> Andy Wingo <wingo@igalia.com> skribis:
>>>
>>>> On Thu 11 Jan 2018 22:55, Mark H Weaver <mhw@netris.org> writes:
>>>
>>> [...]
>>>
>>>>>>> Out of curiosity, is there a reason why you're using an unbuffered port
>>>>>>> in your use case?
>>>>>>
>>>>>> It’s to implement redirect à la socat:
>>>>>>
>>>>>> https://git.savannah.gnu.org/cgit/guix.git/commit/?id=17af5d51de7c40756a4a39d336f81681de2ba447
>>>>>
>>>>> Why is an unbuffered port being used here? Can we change it to a
>>>>> buffered port?
>>>>
>>>> This was also a question I had! If you make it a buffered port at 4096
>>>> bytes (for example), then get-bytevector-some works exactly like you
>>>> want it to, no?
>>>
>>> It might work, but that’s more by chance no?
>>
>> No, it is reliable. get-bytevector-some on a buffered port must either
>> return all the buffered bytes or perform exactly one read (up to the
>> buffer size) and either return those bytes or EOF. As far as I
>> understand, that is exactly what you want.
>
> Indeed, that works well, thanks! So, after all, problem solved?
I’m closing this as not-a-bug.
Ludo’.
prev parent reply other threads:[~2018-02-16 13:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-10 15:02 bug#30066: 'get-bytevector-some' returns only 1 byte from unbuffered ports Ludovic Courtès
2018-01-10 15:59 ` Ludovic Courtès
2018-01-10 16:32 ` Andy Wingo
2018-01-10 16:58 ` Nala Ginrut
2018-01-10 17:26 ` Andy Wingo
2018-01-10 17:43 ` Nala Ginrut
2018-01-11 14:34 ` Ludovic Courtès
2018-01-11 19:55 ` Mark H Weaver
2018-01-11 21:02 ` Ludovic Courtès
2018-01-11 21:55 ` Mark H Weaver
2018-01-12 9:01 ` Andy Wingo
2018-01-12 10:15 ` Ludovic Courtès
2018-01-12 10:33 ` Andy Wingo
2018-01-13 20:53 ` Ludovic Courtès
2018-02-16 13:19 ` Ludovic Courtès [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87sha1nkax.fsf@gnu.org \
--to=ludo@gnu.org \
--cc=30066@debbugs.gnu.org \
--cc=wingo@igalia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).