From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: "Dr. Yuan Liu" Newsgroups: gmane.emacs.help Subject: Re: NON-trivial regular expression problem (could not find on google) Date: Sun, 19 Jan 2003 19:26:56 GMT Organization: http://www.stemnet.nf.ca/~yliu/sciences.html#physics Sender: help-gnu-emacs-bounces+gnu-help-gnu-emacs=m.gmane.org@gnu.org Message-ID: <3E2AFD60.4090405@stemnet.nf.ca.remove_this> References: <7606630f.0301181219.60384da2@posting.google.com> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Trace: main.gmane.org 1043004712 9991 80.91.224.249 (19 Jan 2003 19:31:52 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Sun, 19 Jan 2003 19:31:52 +0000 (UTC) Return-path: Original-Received: from monty-python.gnu.org ([199.232.76.173]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 18aLAc-0002as-00 for ; Sun, 19 Jan 2003 20:31:50 +0100 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 18aL9b-0007K3-09 for gnu-help-gnu-emacs@m.gmane.org; Sun, 19 Jan 2003 14:30:47 -0500 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!canoe.uoregon.edu!arclight.uoregon.edu!wn13feed!worldnet.att.net!204.127.198.203!attbi_feed3!attbi.com!sccrnsc02.POSTED!not-for-mail User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 X-Accept-Language: en-us, en Original-Newsgroups: comp.lang.lisp,comp.lang.awk,comp.unix.shell,gnu.emacs.help Original-Lines: 21 Original-NNTP-Posting-Host: 12.234.28.162 Original-X-Complaints-To: abuse@attbi.com Original-X-Trace: sccrnsc02 1043004416 12.234.28.162 (Sun, 19 Jan 2003 19:26:56 GMT) Original-NNTP-Posting-Date: Sun, 19 Jan 2003 19:26:56 GMT Original-Xref: shelby.stanford.edu comp.lang.lisp:103207 comp.lang.awk:24451 comp.unix.shell:139924 gnu.emacs.help:109193 Original-To: help-gnu-emacs@gnu.org X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: help-gnu-emacs-bounces+gnu-help-gnu-emacs=m.gmane.org@gnu.org Xref: main.gmane.org gmane.emacs.help:5717 X-Report-Spam: http://spam.gmane.org/gmane.emacs.help:5717 Peter J. Acklam wrote: > democrat@india.com (Instant Democracy) wrote: >>The task is to eliminate patterns such as >> DIRNAME/../ >>from the path because they are redundant. > > Are they really? If DIRNAME is a symlink, then there is no > guarantee that these two point to the same place: > > foo/bar/.. > foo > > You *must* ensure that DIRNAME is not a symlink before you > simplify the pathnames like this. This seems to depend on the shell. Only C-ish shells will turn symlinks into real path and cause a problem. Bournish and Kornish shells all stick with the symbolic path, i.e., foo/bar/.. is always foo. Yuan Liu