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Date:      Fri, 18 Dec 2009 02:09:58 +0100
From:      Rolf Nielsen <listreader@lazlarlyricon.com>
To:        Anton Shterenlikht <mexas@bristol.ac.uk>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: editing a binary file
Message-ID:  <4B2AD666.9090404@lazlarlyricon.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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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.
> 
> Any advice?
> 
> many thanks
> anton
> 

Hello Anton,

My bet would be /usr/ports/editors/hexedit. Been a while since I've used 
it, but AFAIR, it has a curses or a curses like interface, and it's 
fairly simple to use, yet sufficiently powerful for most normal binary 
editing. If you want a GUI, I believe gnome (and probably KDE as well) 
has its own hex editor.

Good luck,

Rolf



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