From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Kai Grossjohann Newsgroups: gmane.emacs.help Subject: Re: Path Operations: Concatenation (concat), Extraction of sub-paths, etc. Date: Fri, 27 Apr 2007 08:47:24 +0200 Message-ID: <86lkgeb9fn.fsf@ketchup.de.uu.net> References: <1177602795.646518.293300@o40g2000prh.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: sea.gmane.org 1177656489 22115 80.91.229.12 (27 Apr 2007 06:48:09 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Fri, 27 Apr 2007 06:48:09 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Apr 27 08:48:08 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1HhKFP-0001ps-DD for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Apr 2007 08:48:03 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HhKLD-0002Ii-Qv for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Apr 2007 02:54:03 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HhKKw-0002Gs-Ev for help-gnu-emacs@gnu.org; Fri, 27 Apr 2007 02:53:46 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HhKKv-0002Dr-0q for help-gnu-emacs@gnu.org; Fri, 27 Apr 2007 02:53:46 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HhKKu-0002DW-Ma for help-gnu-emacs@gnu.org; Fri, 27 Apr 2007 02:53:44 -0400 Original-Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1HhKF4-0006Fb-ND for help-gnu-emacs@gnu.org; Fri, 27 Apr 2007 02:47:42 -0400 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1HhKEs-0004Hg-VZ for help-gnu-emacs@gnu.org; Fri, 27 Apr 2007 08:47:38 +0200 Original-Received: from de-lt-054776l.eu.frd.uu.net ([62.191.185.105]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 27 Apr 2007 08:47:30 +0200 Original-Received: from kai by de-lt-054776l.eu.frd.uu.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 27 Apr 2007 08:47:30 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 38 Original-X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: de-lt-054776l.eu.frd.uu.net User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux) Cancel-Lock: sha1:MjSMWa1iyp6dffarCBBH2PN+Ht0= X-detected-kernel: Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:43259 Archived-At: Nordlöw writes: > - concatenation of paths: (path-concat "/usr/" "/lib") => "/usr/lib/" Not exactly, but close: expand-file-name > - extraction of sub-paths: (path-before "/usr/lib/" "/lib/") => "usr/" Not exactly, but close, perhaps: file-name-directory, file-name-nondirectory. > - extraction of sub-paths: (path-after "/usr/lib/X11" "lib") => "X11/" See above. > - full path to local file name: (path-local "/etc/passwd") => "passwd" file-name-nondirectory > - full path to containing directory path: (path-dir "/etc/passwd") => > "/etc/" file-name-directory > If possible results should be standardized/canonicalized, that is > - directories always end with "/" file-name-as-directory > - non-absolute paths always begin directly with the top-most directory > name without the "/" Hm. There must be a function to strip leading "./" and "/./" in the middle, but I don't know what it is. There is file-truename which might do this as a side effect. Kai