220 14638 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Native raw IO and FILE* wrappers? Date: Wed, 19 Nov 2014 17:39:33 +0200 Lines: 46 Approved: news@gmane.org Message-ID: References: <525a4bcf-c4c5-40f4-a89c-620dd543548e@isocpp.org> <5468B075.8030503@wanadoo.fr> <90B6B49B-0202-40CD-B5E2-A7A37CF95470@gmail.com> <2F8BE7E9-1475-4963-B62A-5118783B6E20@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1416411582 15106 80.91.229.3 (19 Nov 2014 15:39:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 19 Nov 2014 15:39:42 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBNPTWKRQKGQEIUED5KY@isocpp.org Wed Nov 19 16:39:36 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f197.google.com ([209.85.214.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xr7Ly-0005NA-UH for gclcip-std-proposals@m.gmane.org; Wed, 19 Nov 2014 16:39:35 +0100 Original-Received: by mail-ob0-f197.google.com with SMTP id va2sf3808493obc.0 for ; Wed, 19 Nov 2014 07:39:34 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type:content-transfer-encoding; bh=MF3yxpYO3gz3JlVFtVCUycU/dANPvcVlH1pcfHM2JpI=; b=aFeTOt3+eF53UksnPzViAre2GhOh4i2Qdwa98b1dK0PWy3xkS5p9VtTbaLjjZuAP3q V/xpwAsV+1tb97jFdxedjGt6oB2C0R1W3fts/uj858vA0XDHIrNpxGCwd3JH/yu3j/e+ cFVDkQ3HX7lHHtfySqpOGW7FdNNFcVNJ8qpIuxnPCTn9yXw85E7m8XsiziONlFsZsHYm E2sJc/ga6Ca73I3xfVbyEaD0onOeOOKxefmnYlkVsLO3oo6x9NLHb0AsZy3Zycy/KNQR E3965iQcN8KpIwSWIxD/9xztM/7ncpAT6KOzXa8/lOKNVualf/dZaLRQN3pXHiDwDC0v 5Fng== X-Gm-Message-State: ALoCoQkc1V9yitZtDz9EThaOYvplZRlg1riKUWiwb64ajoPaj1+Tiulp5ikd3TCswWFTadR7STr6 X-Received: by 10.182.234.108 with SMTP id ud12mr80409939obc.0.1416411574126; Wed, 19 Nov 2014 07:39:34 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.186.100 with SMTP id fj4ls613183obc.53.gmail; Wed, 19 Nov 2014 07:39:33 -0800 (PST) X-Received: by 10.202.210.72 with SMTP id j69mr929017oig.87.1416411573487; Wed, 19 Nov 2014 07:39:33 -0800 (PST) Original-Received: from mail-ob0-x232.google.com (mail-ob0-x232.google.com. [2607:f8b0:4003:c01::232]) by mx.google.com with ESMTPS id 1si1373892oii.122.2014.11.19.07.39.33 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Nov 2014 07:39:33 -0800 (PST) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4003:c01::232 as permitted sender) client-ip=2607:f8b0:4003:c01::232; Original-Received: by mail-ob0-f178.google.com with SMTP id gq1so631899obb.9 for ; Wed, 19 Nov 2014 07:39:33 -0800 (PST) X-Received: by 10.202.128.139 with SMTP id b133mr18866016oid.52.1416411573329; Wed, 19 Nov 2014 07:39:33 -0800 (PST) Original-Received: by 10.76.154.2 with HTTP; Wed, 19 Nov 2014 07:39:33 -0800 (PST) In-Reply-To: <2F8BE7E9-1475-4963-B62A-5118783B6E20@gmail.com> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4003:c01::232 as permitted sender) smtp.mail=ville.voutilainen@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:14638 Archived-At: On 19 November 2014 17:18, David Krauss wrote: >> How's that a problem? >> If it is a problem, hasn't it already been solved for FILE and fstream c= lose()? > It=E2=80=99s a problem that the user can accidentally pass something besi= des an ordinary file. > It=E2=80=99s not solved in the standard library for things that have path= names but shouldn=E2=80=99t be buffered (e.g. in /dev). Well, if a user decides to create a buffered stream on top of such a descriptor, why should we prevent that? You can already do that in posix with fdopen and th= ere's no particular protection against that, and it's questionable whether any protection is necessary. > Creating an access interface that doesn=E2=80=99t require a pathname, and= therefore is specifically suited to things without names or that aren=E2= =80=99t definitely owned by the C++ object, is pure danger. What danger? >>> Offering a FD wrapper >>> supporting only files would be misleading to the user. >> >> If it happens to support other stuff that'd be fine with me. > For other stuff the user would have the appearance of support but actual = lurking errors in buffering and portability. Also, for other stuff, the user would gain the ability to use C++ iostreams on top of a wide variety of things where it would work, and does work with existing extensions just fine, like pipes. --=20 ---=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/. .