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OD(1) 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;
otherwise, with a leading 0, skip is interpreted as an octal
number. 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
character 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
specify 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
output 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 10.99 June 24, 2012 NetBSD 10.99