OD(1)                   NetBSD General Commands Manual                   OD(1)

NAME
     od -- octal, decimal, hex, ascii dump

SYNOPSIS
     od [-aBbcDdeFfHhIiLlOovXx] [-A base] [-j skip] [-N length]
        [-t type_string] [[+]offset[.][Bb]] [file ...]

DESCRIPTION
     The od utility is a filter which displays each specified file, or the
     standard input if no file arguments are specified, in a user specified
     format.

     The options are as follows:

     -A base     Specify the input address base.  base may be one of `d', `o',
                 `x' or `n', which specify decimal, octal, hexadecimal
                 addresses or no address, respectively.

     -a          One-byte character display.  Display the input offset in
                 octal, followed by sixteen space-separated, three column,
                 space-filled, characters of input data per line.  Control
                 characters are printed as their names instead of as C-style
                 escapes.

     -B          Same as -o.

     -b          One-byte octal display.  Display the input offset in octal,
                 followed by sixteen space-separated, three column, zero-
                 filled, bytes of input data, in octal, per line.  This is the
                 default output style if no other is selected.

     -c          One-byte character display.  Display the input offset in
                 octal, followed by sixteen space-separated, three column,
                 space-filled, characters of input data per line.  Control
                 characters are printed at C-style escapes, or as three octal
                 digits, if no C escape exists for the character.

     -d          Two-byte decimal display.  Display the input offset in octal,
                 followed by eight space-separated, five column, zero-filled,
                 two-byte units of input data, in unsigned decimal, per line.

     -e          Eight-byte floating point display.  Display the input offset
                 in octal, followed by two space-separated, twenty-one column,
                 space filled, eight byte units of input data, in floating
                 point, per line.

     -F          Same as -e.

     -f          Four-byte floating point display.  Display the input offset
                 in octal, followed by four space-separated, 14 column, space
                 filled, four byte units of input data, in floating point, per
                 line.

     -H          Four-byte hex display.  Display the input offset in octal,
                 followed by four space-separated, eight column, zero filled,
                 four byte units of input data, in hex, per line.

     -h          Two-byte hex display.  Display the input offset in octal,
                 followed by eight space-separated, four column, zero filled,
                 two byte units of input data, in hex, per line.

     -I          Four-byte decimal display.  Display the input offset in
                 octal, followed by four space-separated, eleven column, space
                 filled, four byte units of input data, in decimal, per line.

     -i          Two-byte decimal display.  Display the input offset in octal,
                 followed by eight space-separated, six column, space filled,
                 two-byte units of input data, in decimal, per line.

     -j skip     Skip skip bytes from the beginning of the input.  By default,
                 skip is interpreted as a decimal number.  With a leading 0x
                 or 0X, skip is interpreted as a hexadecimal number; other-
                 wise, with a leading 0, skip is interpreted as an octal num-
                 ber.  Appending the character b, k, or m to skip causes it to
                 be interpreted as a multiple of 512, 1024, or 1048576,
                 respectively.

     -L          Same as -I.

     -l          Same as -I.

     -N length   Interpret only length bytes of input.

     -O          Four-byte octal display.  Display the input offset in octal,
                 followed by four space-separated, eleven column, zero-filled,
                 four-byte units of input data, in octal, per line.

     -o          Two-byte octal display.  Display the input offset in octal,
                 followed by eight space-separated, six column, zero-filled,
                 two-byte units of input data, in octal, per line.

     -t type_string
                 Specify one or more output types.  The type_string option-
                 argument must be a string specifying the types to be used
                 when writing the input data.  The string must consist of the
                 type specification characters:

                 a selects US-ASCII output, with control characters replaced
                 with their names instead of as C escape sequences.  See also
                 the _u conversion provided by hexdump(1).

                 c selects a standard character based conversion.  See also
                 the _c conversion provided by hexdump(1).

                 f selects the floating point output format.  This type char-
                 acter can be optionally followed by the characters 4 or F to
                 specify four byte floating point output, or 8 or L to specify
                 eight byte floating point output.  The default output format
                 is eight byte floats.  See also the e conversion provided by
                 hexdump(1).

                 d, o, u, or x select decimal, octal, unsigned decimal, or hex
                 output respectively.  These types can optionally be followed
                 by C to specify char-sized output, S to specify short-sized
                 output, I to specify int-sized output, L to specify
                 long-sized output, 1 to specify one-byte output, 2 to specify
                 two-byte output, 4 to specify four-byte output, or 8 to spec-
                 ify eight-byte output.  The default output format is in four-
                 byte quantities.  See also the d, o, u, and x conversions
                 provided by hexdump(1).

     -v          The -v option causes od to display all input data.  Without
                 the -v option, any number of groups of output lines, which
                 would be identical to the immediately preceding group of out-
                 put lines (except for the input offsets), are replaced with a
                 line comprised of a single asterisk (`*').

     -X          Same as -H.

     -x          Same as -h.

     For each input file, od sequentially copies the input to standard output,
     transforming the data according to the options given.  If no options are
     specified, the default display is equivalent to specifying the -o option.

EXIT STATUS
     The od utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     hexdump(1), strings(1)

HISTORY
     An od command appeared in Version 1 AT&T UNIX.

     This man page was initially written in February 2001 by Andrew Brown,
     shortly after he augmented the deprecated od syntax to include things he
     felt had been missing for a long time.

NetBSD 7.0                       June 24, 2012                      NetBSD 7.0

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