From owner-freebsd-questions@FreeBSD.ORG Sun Jan 14 21:44:25 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6852116A415 for ; Sun, 14 Jan 2007 21:44:25 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (dsl231-043-140.sea1.dsl.speakeasy.net [216.231.43.140]) by mx1.freebsd.org (Postfix) with ESMTP id 0D87213C4A5 for ; Sun, 14 Jan 2007 21:44:24 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (localhost [127.0.0.1]) by tao.thought.org (8.13.8/8.13.1) with ESMTP id l0ELiBJ6028586; Sun, 14 Jan 2007 13:44:11 -0800 (PST) (envelope-from kline@tao.thought.org) Received: (from kline@localhost) by tao.thought.org (8.13.8/8.13.1/Submit) id l0ELiBQr028585; Sun, 14 Jan 2007 13:44:11 -0800 (PST) (envelope-from kline) Date: Sun, 14 Jan 2007 13:44:11 -0800 From: Gary Kline To: Giorgos Keramidas Message-ID: <20070114214410.GB24039@thought.org> References: <20070114024551.GA21847@thought.org> <20070114034148.GC2734@kobe.laptop> <20070114201546.GA28048@thought.org> <20070114203104.GB3404@kobe.laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070114203104.GB3404@kobe.laptop> X-Organization: Thought Unlimited. Public service Unix since 1986. X-Of_Interest: Observing twenty years of service to the Unix community User-Agent: Mutt/1.5.13 (2006-08-11) Cc: Gary Kline , freebsd-questions@freebsd.org Subject: Re: perl substitution question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Jan 2007 21:44:25 -0000 On Sun, Jan 14, 2007 at 10:31:04PM +0200, Giorgos Keramidas wrote: > On 2007-01-14 12:15, Gary Kline wrote: > > Thanks for all the ways, gents. (I never thought of tr, but now that > > seems like an option.) A week+ ago I tried perl using 's/\xNN/"/g' > > from the cmdline, but nojoy. The online docs said that \N{xx} would > > catch a hex character; that's what was fuzzy. > > Watch out for shells with funny 'expansion rules', like csh(1) :) > > Even in sh(1) variants, it's always a good idea to save the Perl script > in a file first, and test it independently of the shell, with: > > perl filter.pl < infile > outfile > > To avoid all the messy details about single-quotes, double-quotes, > backquotes, stars, dollars, etc :) > Man! truer words, (&c)... . One o the very few suggestions left for improving shells [ and/or subshells ] is a flag, say '-N' which would have *nothing* to be escaped. In other words a '$' or '"' would be interpreted literally. But I'm sure there are reasons for not escaping some bytes. -- Gary Kline kline@thought.org www.thought.org Public Service Unix