Date: Thu, 17 Dec 2009 18:38:04 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Anton Shterenlikht <mexas@bristol.ac.uk> Cc: freebsd-questions@freebsd.org Subject: Re: editing a binary file Message-ID: <alpine.BSF.2.00.0912171820130.53881@wonkity.com> In-Reply-To: <20091218005102.GA51064@mech-cluster241.men.bris.ac.uk> References: <20091218005102.GA51064@mech-cluster241.men.bris.ac.uk>
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On Fri, 18 Dec 2009, Anton Shterenlikht wrote: > 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. truncate -4 myfile should get rid of the last four bytes. Maybe there's a similar efficient way to truncate the start of a file. -Warren Block * Rapid City, South Dakota USA
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