From owner-freebsd-questions@FreeBSD.ORG Mon May 19 10:37:55 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4F896106567A for ; Mon, 19 May 2008 10:37:55 +0000 (UTC) (envelope-from jonathan@hst.org.za) Received: from hermes.hst.org.za (onix.hst.org.za [209.203.2.133]) by mx1.freebsd.org (Postfix) with ESMTP id 8056C8FC17 for ; Mon, 19 May 2008 10:37:51 +0000 (UTC) (envelope-from jonathan@hst.org.za) Received: from sysadmin.hst.org.za (sysadmin.int.dbn.hst.org.za [10.1.1.20]) (authenticated bits=0) by hermes.hst.org.za (8.13.8/8.13.8) with ESMTP id m4JAZZjL088665 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO) for ; Mon, 19 May 2008 12:35:36 +0200 (SAST) (envelope-from jonathan@hst.org.za) From: Jonathan McKeown Organization: Health Systems Trust To: freebsd-questions@freebsd.org Date: Mon, 19 May 2008 12:40:46 +0200 User-Agent: KMail/1.7.2 References: <7d6fde3d0805190149y7a3bfa75j2ca6a67cef66e8f6@mail.gmail.com> <20080519094603.GC12033@osiris.chen.org.nz> In-Reply-To: <20080519094603.GC12033@osiris.chen.org.nz> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200805191240.47144.jonathan@hst.org.za> X-Spam-Score: -4.378 () ALL_TRUSTED,AWL,BAYES_00 X-Scanned-By: MIMEDefang 2.61 on 209.203.2.133 Subject: Re: Now what would you expect this to print out? 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: Mon, 19 May 2008 10:37:55 -0000 On Monday 19 May 2008 11:46, Jonathan Chen wrote: > On Mon, May 19, 2008 at 01:49:35AM -0700, Garrett Cooper wrote: > > Riddle for the day for folks that have source trees... what would you > > expect this to print out (ask yourself the question and then execute the > > command)? > > > > find /usr/src -name Makefile -or -name '*.mk' -print > > > > The expected output and what actual output differed in my mind, but maybe > > somebody else can "shed some light" on the logic behind what happened > > It's a problem that catches many young players with find(1). One has > to remember from reading the man-page that all directives have an > implicit AND operator on it; and that includes the "-print" directive. > So to get what you want, you have to introduce brackets: > > find /usr/src \( -name Makefile -or -name '*.mk' \) -print Or, slightly bizarrely, just leave the -print off altogether - as the manpage says, If none of -exec, -ls, -print0, or -ok is specified, the given expression shall be effectively replaced by ( given expression ) -print. [Note the parens around given expression] I forget where I saw this quote first, but the last five words always make me think of the find command: Real Programmers consider "what you see is what you get" to be just as bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor - complicated, cryptic, powerful, unforgiving, dangerous. Jonathan