From owner-freebsd-ports@FreeBSD.ORG Sat Mar 17 01:25:30 2012 Return-Path: Delivered-To: freebsd-ports@freebsd.org Received: from mx2.freebsd.org (mx2.freebsd.org [69.147.83.53]) by hub.freebsd.org (Postfix) with ESMTP id 7F651106566B; Sat, 17 Mar 2012 01:25:30 +0000 (UTC) (envelope-from dougb@FreeBSD.org) Received: from opti.dougb.net (hub.freebsd.org [IPv6:2001:4f8:fff6::36]) by mx2.freebsd.org (Postfix) with ESMTP id 06FF41502B4; Sat, 17 Mar 2012 01:25:29 +0000 (UTC) Message-ID: <4F63E809.1080606@FreeBSD.org> Date: Fri, 16 Mar 2012 18:25:29 -0700 From: Doug Barton Organization: http://SupersetSolutions.com/ User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:10.0.2) Gecko/20120224 Thunderbird/10.0.2 MIME-Version: 1.0 To: Jonathan Anderson References: <4F60C059.7060904@FreeBSD.org> In-Reply-To: X-Enigmail-Version: 1.3.5 OpenPGP: id=1A1ABC84 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Adrian Chadd , freebsd-current@freebsd.org, Gabor Kovesdan , freebsd-ports@freebsd.org, Oleg Moskalenko Subject: Re: CFT: new BSD-licensed sort available X-BeenThere: freebsd-ports@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting software to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Mar 2012 01:25:30 -0000 On 03/14/2012 15:14, Jonathan Anderson wrote: > In fact, the runtime behaviour of the Debian "alternatives" system is simpler than that: > http://segfault.in/2010/04/using-the-debian-alternatives-system/ > > The custom Perl script with a config file is used to set up symlinks, which at runtime are... well, just symlinks. For instance, /usr/bin/vim is a symlink to /etc/alternatives/vim, which is itself a symlink to a binary like vim.gtk (example shamelessly stolen from the linked page, since I no longer have any Debian boxes to check for myself on :). No magic binaries or argv[0] fu. This sounds like a good solution to more than one problem. Does anyone know why they indirect through 2 sets of symlinks? That article doesn't touch on the "why?" only the what. Doug -- This .signature sanitized for your protection