From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.0 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 7D5401F453 for ; Fri, 8 Feb 2019 19:15:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727277AbfBHTPW (ORCPT ); Fri, 8 Feb 2019 14:15:22 -0500 Received: from cloud.peff.net ([104.130.231.41]:37944 "HELO cloud.peff.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1726906AbfBHTPV (ORCPT ); Fri, 8 Feb 2019 14:15:21 -0500 Received: (qmail 14259 invoked by uid 109); 8 Feb 2019 19:15:21 -0000 Received: from Unknown (HELO peff.net) (10.0.1.2) by cloud.peff.net (qpsmtpd/0.94) with SMTP; Fri, 08 Feb 2019 19:15:21 +0000 Authentication-Results: cloud.peff.net; auth=none Received: (qmail 26619 invoked by uid 111); 8 Feb 2019 19:15:30 -0000 Received: from sigill.intra.peff.net (HELO sigill.intra.peff.net) (10.0.0.7) by peff.net (qpsmtpd/0.94) with (ECDHE-RSA-AES256-GCM-SHA384 encrypted) SMTP; Fri, 08 Feb 2019 14:15:30 -0500 Authentication-Results: peff.net; auth=none Received: by sigill.intra.peff.net (sSMTP sendmail emulation); Fri, 08 Feb 2019 14:15:19 -0500 Date: Fri, 8 Feb 2019 14:15:19 -0500 From: Jeff King To: "Randall S. Becker" Cc: 'Junio C Hamano' , git@vger.kernel.org, 'Linux Kernel' , git-packagers@googlegroups.com Subject: Re: [Breakage] Git v2.21.0-rc0 - t5318 (NonStop) Message-ID: <20190208191519.GF27673@sigill.intra.peff.net> References: <000f01d4bf9e$a508eab0$ef1ac010$@nexbridge.com> <20190208165052.GC23461@sigill.intra.peff.net> <001101d4bfd6$b9430230$2bc90690$@nexbridge.com> <20190208180321.GB27673@sigill.intra.peff.net> <002501d4bfde$b26e6050$174b20f0$@nexbridge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <002501d4bfde$b26e6050$174b20f0$@nexbridge.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Fri, Feb 08, 2019 at 01:47:04PM -0500, Randall S. Becker wrote: > > Though I suspect we may be able to just find a solution that works > > everywhere, without having two different implementations. If we know we > > need $count bytes for dd, we could probably just generate a file with that > > many NULs in it. > > For this, we could use truncate -s count file instead of dd to get a > fixed size file of nulls. This would remove the need for /dev/zero in > t5318 (the patch below probably will wrap badly in my mailer so I can > submit a real patch separately. I don't think "truncate" is portable, though. > > Other cases don't seem to actually care that they're getting NULs, and are > > just redirecting stdin from /dev/zero to get an infinite amount of input. They > > could probably use "yes" for that. > > What about reading from /dev/null? That would yield zero bytes, not an infinite number of them. -Peff