From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ken Brown Newsgroups: gmane.emacs.bugs Subject: bug#14569: 24.3.50; bootstrap fails on Cygwin Date: Tue, 25 Jun 2013 11:51:20 -0400 Message-ID: <51C9BC78.6090301@cornell.edu> References: <51BC720D.7080504@alice.it> <51BDB979.3040508@cornell.edu> <20130616150141.GB3622@ednor.casa.cgf.cx> <51BDFB25.8080101@cornell.edu> <51BE01EC.3000701@cornell.edu> <51C60DEB.8030804@alice.it> <51C75149.1070609@alice.it> <51C793FA.9070806@cs.ucla.edu> <51C8275A.4080307@cornell.edu> <51C886D5.3030704@alice.it> <51C8B4AD.7050609@cs.ucla.edu> <51C8DB3A.7050206@alice.it> <51C99C65.1020000@cornell.edu> <51C9A160.3000203@cornell.edu> <51C9AE6B.5070204@cs.ucla.edu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1372175533 23652 80.91.229.3 (25 Jun 2013 15:52:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 25 Jun 2013 15:52:13 +0000 (UTC) Cc: "14569@debbugs.gnu.org" <14569@debbugs.gnu.org>, Angelo Graziosi To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Jun 25 17:52:12 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1UrVXP-0001tN-Tw for geb-bug-gnu-emacs@m.gmane.org; Tue, 25 Jun 2013 17:52:12 +0200 Original-Received: from localhost ([::1]:47568 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrVXP-0007gq-Jz for geb-bug-gnu-emacs@m.gmane.org; Tue, 25 Jun 2013 11:52:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37552) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrVXI-0007fQ-Bp for bug-gnu-emacs@gnu.org; Tue, 25 Jun 2013 11:52:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UrVXH-0005qf-87 for bug-gnu-emacs@gnu.org; Tue, 25 Jun 2013 11:52:04 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:46350) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrVXH-0005qb-4g for bug-gnu-emacs@gnu.org; Tue, 25 Jun 2013 11:52:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1UrVXG-00078k-Op for bug-gnu-emacs@gnu.org; Tue, 25 Jun 2013 11:52:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ken Brown Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 25 Jun 2013 15:52:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 14569 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 14569-submit@debbugs.gnu.org id=B14569.137217549227333 (code B ref 14569); Tue, 25 Jun 2013 15:52:02 +0000 Original-Received: (at 14569) by debbugs.gnu.org; 25 Jun 2013 15:51:32 +0000 Original-Received: from localhost ([127.0.0.1]:40651 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1UrVWl-00076m-Tf for submit@debbugs.gnu.org; Tue, 25 Jun 2013 11:51:32 -0400 Original-Received: from limerock01.mail.cornell.edu ([128.84.12.99]:46200) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1UrVWi-00076P-TD for 14569@debbugs.gnu.org; Tue, 25 Jun 2013 11:51:30 -0400 X-CornellRouted: This message has been Routed already. Original-Received: from authusersmtp.mail.cornell.edu (granite4.serverfarm.cornell.edu [10.16.197.9]) by limerock01.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id r5PFpIlj004581; Tue, 25 Jun 2013 11:51:19 -0400 Original-Received: from [192.168.1.9] (cpe-67-249-194-47.twcny.res.rr.com [67.249.194.47]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id r5PFpH7S002958 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 25 Jun 2013 11:51:18 -0400 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 In-Reply-To: <51C9AE6B.5070204@cs.ucla.edu> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:75571 Archived-At: On 6/25/2013 10:51 AM, Paul Eggert wrote: > On 06/25/2013 06:55 AM, Ken Brown wrote: >> I'm puzzled by the asymmetry between block_child_signal and unblock_child_signal. The first blocks SIGCHLD, while the second unblocks *all* signals. Why is this the right thing to do? >> >> Ken > > I didn't write that code, but here's my guess. According to 'bzr log', you introduced those two functions in rev 111081. > Emacs normally runs with all signals unblocked. > Unblocking everything is the right thing to do, > if there's a bug elsewhere in Emacs that inadvertently > leaves signals blocked. I still don't get the asymmetry. By your reasoning, it would seem that block_child_signal should set the mask so that only SIGCHLD is blocked. And can unblock_child_signal really be sure that there's no good reason for a signal to be blocked? But I don't want to belabor this. You know much more about this than I do, so if you're sure the existing code is right, I'll drop it. Ken