DragonFly On-Line Manual Pages

hexdump(1)             DragonFly General Commands Manual            hexdump(1)

NAME
       hexdump - reversible hexdump

SYNOPSIS
       hexdump [ -v ] [ -f ] [ [ -i ]  inputfile ] [ -o outputfile ] [ -w # ]

DESCRIPTION
       hexdump is the standard utility for viewing binary files.

       Together with hex2bin, hexdump is also a utility for editing binary
       files. First you hexdump the file, then you modify the dump-file in an
       editor, then you use hex2bin to produce the modified binary file.

OPTIONS
       -v   causes hexdump to display all input data.  Without this option,
            any number of output lines that are identical to the immediately
            preceding output line (except for the input offset), are replaced
            with a line comprised of a single asterisk. This makes output more
            concise e.g. if input contains a long sequence of one repeated
            byte value.

       -w # specifies the number of hex-dumped bytes per output line.  Minimum
            is 1, maximum is 10240 but can be changed in the source. Default
            is 16.

       -f   (flush-mode) causes hexdump to reflect its input immediately.
            Without this option, output is buffered (on ttys this means
            linebuffered, otherwise even blockbuffered).  This option is
            especially useful, if you want to watch bytes as they are
            trickling out of a binary device. (e.g.  /dev/mouse, /dev/ttyS1)

            For obvious reasons, this implies -v.

       [-i] inputfile
            at most one inputfile can be given. if none is, then stdin will be
            used for input. (Giving more Inputfiles would have no sense.)  On
            systems where textfiles and binaries are treated differently (such
            as MS-DOS) an inputFile should be given, as input-redirection may
            be flakey with binary data.

       -o outputfile
            at most one outputfile can be given. if none is, then stdout will
            be used for output.

BUGS
       none  ;-)

SEE ALSO
       hex2bin(1)

COPYRIGHT
       Copyright (c) 2001 by   Andreas Leitgeb (AvL)
       (avl@logic.at)

       Permission to use, copy, modify, and distribute this software and its
       documentation for any purpose and without fee is hereby granted,
       provided that the above copyright notice appear in all copies and that
       both that copyright notice and this permission notice appear in
       supporting documentation.

                                  24 Mar 2001                       hexdump(1)