From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: EWOULDBLOCK and EINPROGRESS in process.c Date: Tue, 24 Mar 2015 16:42:00 -0700 Organization: UCLA Computer Science Department Message-ID: <5511F648.4030505@cs.ucla.edu> References: <83sicup8s0.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1427240612 28405 80.91.229.3 (24 Mar 2015 23:43:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 24 Mar 2015 23:43:32 +0000 (UTC) To: Eli Zaretskii , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 25 00:43:17 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YaYTd-0001Wd-FN for ged-emacs-devel@m.gmane.org; Wed, 25 Mar 2015 00:43:17 +0100 Original-Received: from localhost ([::1]:35094 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YaYTc-00078B-Rb for ged-emacs-devel@m.gmane.org; Tue, 24 Mar 2015 19:43:16 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:36050) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YaYSZ-0005rj-Mm for emacs-devel@gnu.org; Tue, 24 Mar 2015 19:42:12 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YaYSY-0004LI-Np for emacs-devel@gnu.org; Tue, 24 Mar 2015 19:42:11 -0400 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]:46437) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YaYSV-0004Kh-0c; Tue, 24 Mar 2015 19:42:07 -0400 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id 70249A60053; Tue, 24 Mar 2015 16:42:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at smtp.cs.ucla.edu Original-Received: from smtp.cs.ucla.edu ([127.0.0.1]) by localhost (smtp.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2RISj1ckej6L; Tue, 24 Mar 2015 16:42:04 -0700 (PDT) Original-Received: from [192.168.1.9] (pool-100-32-155-148.lsanca.fios.verizon.net [100.32.155.148]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id 685EDA60039; Tue, 24 Mar 2015 16:42:04 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 In-Reply-To: <83sicup8s0.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 131.179.128.62 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:184189 Archived-At: Eli Zaretskii wrote: > Can someone tell why we need that "#else" there? The EWOULDBLOCK code is there because Kim Storm heard a rumor that some oddball nonblocking 'connect' implementations returned EWOULDBLOCK. Please see: https://lists.gnu.org/archive/html/emacs-devel/2002-02/msg00718.html I also vaguely recall stories that some old Unix platforms did that. The most recent reference I found in a quick Google search was UnixWare 7 Release 7.1.4 (April 2004): http://uw714doc.sco.com/en/SDK_netapi/sockC.nonBlockSocks.html If that documentation is right, the current Emacs code wouldn't work on UnixWare 7.1.4, not that we care.