From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=) Newsgroups: gmane.lisp.guile.bugs Subject: bug#30066: 'get-bytevector-some' returns only 1 byte from unbuffered ports Date: Wed, 10 Jan 2018 16:02:10 +0100 Message-ID: <87zi5lrc3x.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1515596478 11360 195.159.176.226 (10 Jan 2018 15:01:18 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 10 Jan 2018 15:01:18 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) Cc: Andy Wingo To: 30066@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Wed Jan 10 16:01:13 2018 Return-path: Envelope-to: guile-bugs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eZHsO-0002YZ-6x for guile-bugs@m.gmane.org; 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Wed, 10 Jan 2018 10:02:21 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eZHtN-0004FX-LI for bug-guile@gnu.org; Wed, 10 Jan 2018 10:02:17 -0500 Original-Received: from hera.aquilenet.fr ([185.233.100.1]:40526) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eZHtN-0004EZ-Fe for bug-guile@gnu.org; Wed, 10 Jan 2018 10:02:13 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id E2BDD10862; Wed, 10 Jan 2018 16:02:11 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Original-Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HxCHz-pPuV4G; Wed, 10 Jan 2018 16:02:11 +0100 (CET) Original-Received: from ribbon (unknown [IPv6:2a01:e0a:1d:7270:af76:b9b:ca24:c465]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 259B9107B9; Wed, 10 Jan 2018 16:02:11 +0100 (CET) X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 21 =?UTF-8?Q?Niv=C3=B4se?= an 226 de la =?UTF-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.org gmane.lisp.guile.bugs:8951 Archived-At: As discussed on IRC, =E2=80=98get-bytevector-some=E2=80=99 returns only 1 b= yte from unbuffered ports: --8<---------------cut here---------------start------------->8--- scheme@(guile-user)> (call-with-input-string "foo" (lambda (port) (setvbuf port _IONBF) (get-bytevector-some port))) $11 =3D #vu8(102) scheme@(guile-user)> (version) $12 =3D "2.2.3" --8<---------------cut here---------------end--------------->8--- Strictly speaking it=E2=80=99s valid, but in practice it=E2=80=99s not very= useful. AFAICS, we lack a way to do the equivalent of: read (fd, buf, sizeof buf); =E2=80=98get-bytevector-n!=E2=80=99 is different because it blocks until it= has read COUNT bytes or EOF is reached. So =E2=80=98get-bytevector-some=E2=80=99 co= uld play this role, but it doesn=E2=80=99t. Thoughts? Ludo=E2=80=99.