From owner-freebsd-questions@FreeBSD.ORG Fri Dec 18 00:51:07 2009 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 9EE261065670 for ; Fri, 18 Dec 2009 00:51:07 +0000 (UTC) (envelope-from mexas@bristol.ac.uk) Received: from dirj.bris.ac.uk (dirj.bris.ac.uk [137.222.10.78]) by mx1.freebsd.org (Postfix) with ESMTP id 5EA718FC08 for ; Fri, 18 Dec 2009 00:51:07 +0000 (UTC) Received: from seis.bris.ac.uk ([137.222.10.93]) by dirj.bris.ac.uk with esmtp (Exim 4.69) (envelope-from ) id 1NLR3f-00030Q-Fs for freebsd-questions@freebsd.org; Fri, 18 Dec 2009 00:51:06 +0000 Received: from mech-cluster241.men.bris.ac.uk ([137.222.187.241]) by seis.bris.ac.uk with esmtp (Exim 4.67) (envelope-from ) id 1NLR3e-00071j-IS for freebsd-questions@freebsd.org; Fri, 18 Dec 2009 00:51:03 +0000 Received: from mech-cluster241.men.bris.ac.uk (localhost [127.0.0.1]) by mech-cluster241.men.bris.ac.uk (8.14.3/8.14.3) with ESMTP id nBI0p28m051076 for ; Fri, 18 Dec 2009 00:51:02 GMT (envelope-from mexas@bristol.ac.uk) Received: (from mexas@localhost) by mech-cluster241.men.bris.ac.uk (8.14.3/8.14.3/Submit) id nBI0p2jf051075 for freebsd-questions@freebsd.org; Fri, 18 Dec 2009 00:51:02 GMT (envelope-from mexas@bristol.ac.uk) X-Authentication-Warning: mech-cluster241.men.bris.ac.uk: mexas set sender to mexas@bristol.ac.uk using -f Date: Fri, 18 Dec 2009 00:51:02 +0000 From: Anton Shterenlikht To: freebsd-questions@freebsd.org Message-ID: <20091218005102.GA51064@mech-cluster241.men.bris.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) X-Spam-Score: -1.5 X-Spam-Level: - Subject: editing a binary file 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: Fri, 18 Dec 2009 00:51:07 -0000 I'm creating binary files in fortran. Fortran adds 4 byte record delimiters at the beginning and the end of each record, which, in the case of a binary file, is just at the beginning and at the end of the file. I need to delete these record delimiters, because the software I use to visualise the binary files interprets them as data. But I don't know how. I've looked at hexdump and od, but those are only dumping (I think) file contents, and I cannot see how to edit a file with them. Any advice? many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423