From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Function to find symlink target Date: Sat, 28 May 2022 17:29:02 +0200 Message-ID: <87pmjxoev5.fsf@dataswamp.org> References: <875ylxe98k.fsf@dataswamp.org> <878rqsyo1x.fsf@dataswamp.org> <87wneb690a.fsf@dataswamp.org> <871qwjzqg5.fsf@web.de> <87o7zn65jp.fsf@dataswamp.org> <87ilpvd5s1.fsf@web.de> <87bkvn9x12.fsf@dataswamp.org> <87czg35n3g.fsf@web.de> <871qwif973.fsf@web.de> <87fskv9gm8.fsf@dataswamp.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32614"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:CRcVUl5jH8WZZ6VsF2It8pXOYsE= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat May 28 17:29:54 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nuyO1-0008HI-Jc for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 28 May 2022 17:29:53 +0200 Original-Received: from localhost ([::1]:37214 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nuyO0-0001x0-7k for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 28 May 2022 11:29:52 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56908) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nuyNP-0001wr-8R for help-gnu-emacs@gnu.org; Sat, 28 May 2022 11:29:15 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:59678) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nuyNN-0003TR-F0 for help-gnu-emacs@gnu.org; Sat, 28 May 2022 11:29:14 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nuyNK-0007UL-Fh for help-gnu-emacs@gnu.org; Sat, 28 May 2022 17:29:10 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:137449 Archived-At: Jean Louis wrote: > Let us say there are 100 websites, there is repository of > pictures, videos, files on computer, but one part must be on > websites too, then there is website repository on a local > computer. Images and files are then linked to website > repository on local computer in their corresponding > locations, this saving space, then rsync uploads symlinks as > real files to web server. > > In this case symlinks spare huge hard disk space. Actually a file (size F) and a symlink (size S and 0 < S) takes F + S while just the file takes F. How big is a symlink? $ touch a.txt $ ln -s a.txt a-sy.txt $ du -b a-sl.txt 5 5 bytes. The path to a.txt. The advantage is one can create virtual filesystems on a file-by-file basis. There are many use cases for that including the one you mention ... > There is no general rule that one should tell to avoid some > feature The general rule is don't use it unless there is a good reason to. > rather there shall be particular case to consider to see > what could be better solution. Indeed. -- underground experts united https://dataswamp.org/~incal