From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: auto-update of Info dir file? Date: Tue, 16 May 2006 14:44:39 -0400 Message-ID: References: <87u07qr5iq.fsf-monnier+emacs@gnu.org> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1147805114 23491 80.91.229.2 (16 May 2006 18:45:14 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Tue, 16 May 2006 18:45:14 +0000 (UTC) Cc: drew.adams@oracle.com, emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue May 16 20:45:12 2006 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1Fg4XX-0008Kx-LC for ged-emacs-devel@m.gmane.org; Tue, 16 May 2006 20:45:03 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Fg4XX-0000rv-OX for ged-emacs-devel@m.gmane.org; Tue, 16 May 2006 14:45:03 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Fg4XK-0000qT-DY for emacs-devel@gnu.org; Tue, 16 May 2006 14:44:50 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Fg4XI-0000pu-LY for emacs-devel@gnu.org; Tue, 16 May 2006 14:44:50 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Fg4XI-0000pq-GK for emacs-devel@gnu.org; Tue, 16 May 2006 14:44:48 -0400 Original-Received: from [132.204.24.67] (helo=mercure.iro.umontreal.ca) by monty-python.gnu.org with esmtp (Exim 4.52) id 1Fg4Zx-0007xr-7z; Tue, 16 May 2006 14:47:33 -0400 Original-Received: from hidalgo.iro.umontreal.ca (hidalgo.iro.umontreal.ca [132.204.27.50]) by mercure.iro.umontreal.ca (Postfix) with ESMTP id 712602CE9C5; Tue, 16 May 2006 14:44:45 -0400 (EDT) Original-Received: from faina.iro.umontreal.ca (faina.iro.umontreal.ca [132.204.26.177]) by hidalgo.iro.umontreal.ca (Postfix) with ESMTP id 04DC4445C; Tue, 16 May 2006 14:44:40 -0400 (EDT) Original-Received: by faina.iro.umontreal.ca (Postfix, from userid 20848) id E7DBE6C803; Tue, 16 May 2006 14:44:39 -0400 (EDT) Original-To: Eli Zaretskii In-Reply-To: (Eli Zaretskii's message of "Tue, 16 May 2006 20:36:52 +0300") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) X-DIRO-MailScanner-Information: Please contact the ISP for more information X-DIRO-MailScanner: Found to be clean X-DIRO-MailScanner-SpamCheck: n'est pas un polluriel, SpamAssassin (score=-2.82, requis 5, autolearn=not spam, ALL_TRUSTED -2.82) X-DIRO-MailScanner-From: monnier@iro.umontreal.ca X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:54600 Archived-At: >> It's probably OK if we only do the check when the mtime of the parent dir is >> more recent than the mtime of the dir file (and only under Unix, of course, >> since this presumes POSIXy semantics). > Is it indeed guaranteed that the mtime of the directory is always > _after_ the last file modified in that directory? No. POSIX only says that the mtime of the dir reflects the last time a file was added/removed from the directory, which is pretty much exactly what we need here. Lucky for us: if updating the dir file would cause the dir's mtime stamp to be changed would lead us to lalaland. Stefan