From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Setting TZ in set_time_zone_rule Date: Fri, 30 Nov 2012 20:52:39 +0200 Message-ID: <83sj7qudmw.fsf@gnu.org> References: <83624pwq8z.fsf@gnu.org> <50B67266.1000509@cs.ucla.edu> <50B6B886.9020309@cs.ucla.edu> <83zk21ul87.fsf@gnu.org> <50B7D60C.7070306@cs.ucla.edu> <83d2yvv4o0.fsf@gnu.org> <837gp3v26f.fsf@gnu.org> <50B8F96B.80803@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1354301586 7700 80.91.229.3 (30 Nov 2012 18:53:06 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 30 Nov 2012 18:53:06 +0000 (UTC) Cc: schwab@linux-m68k.org, fabrice.popineau@gmail.com, emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Nov 30 19:53:15 2012 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 1TeVi2-0000RN-OU for ged-emacs-devel@m.gmane.org; Fri, 30 Nov 2012 19:53:10 +0100 Original-Received: from localhost ([::1]:58187 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TeVhr-0006r2-EX for ged-emacs-devel@m.gmane.org; Fri, 30 Nov 2012 13:52:59 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:51505) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TeVho-0006qe-TF for emacs-devel@gnu.org; Fri, 30 Nov 2012 13:52:57 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TeVhn-00031M-DA for emacs-devel@gnu.org; Fri, 30 Nov 2012 13:52:56 -0500 Original-Received: from mtaout23.012.net.il ([80.179.55.175]:62482) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TeVhn-00031F-5k for emacs-devel@gnu.org; Fri, 30 Nov 2012 13:52:55 -0500 Original-Received: from conversion-daemon.a-mtaout23.012.net.il by a-mtaout23.012.net.il (HyperSendmail v2007.08) id <0MEB00K00DLYPD00@a-mtaout23.012.net.il> for emacs-devel@gnu.org; Fri, 30 Nov 2012 20:52:53 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout23.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MEB00KD0DS4I0B0@a-mtaout23.012.net.il>; Fri, 30 Nov 2012 20:52:53 +0200 (IST) In-reply-to: <50B8F96B.80803@cs.ucla.edu> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.175 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:155151 Archived-At: > Date: Fri, 30 Nov 2012 10:22:35 -0800 > From: Paul Eggert > CC: Fabrice Popineau , schwab@linux-m68k.org, > emacs-devel@gnu.org > > On 11/30/12 02:02, Eli Zaretskii wrote: > > Paul, can you point out where would 'unsetenv' be needed, > > and why? > > set_time_zone_rule (0) needs to unset TZ. Do we ever call it that way? > >> > Also, is unsetenv("TZ") the same as putenv("TZ=") ? > > Yes. > > Doesn't the former unset TZ, and the latter set TZ to the empty string? The implementation I saw unset TZ in both cases.