OD(1-BSD) RISC/os Reference Manual OD(1-BSD)
NAME
od - octal, decimal, hex, ascii dump
SYNOPSIS
od [ -format ] [ file ] [ [+]offset[.][b] [label] ]
DESCRIPTION
od displays file, or it's standard input, in one or more
dump formats as selected by the first argument. If the
first argument is missing, -o is the default. Dumping con-
tinues until end-of-file.
The meanings of the format argument characters are:
a Interpret bytes as characters and display them with
their ACSII names. If the p character is given also,
then bytes with even parity are underlined. The P
character causes bytes with odd parity to be under-
lined. Otherwise the parity bit is ignored.
b Interpret bytes as unsigned octal.
c Interpret bytes as ASCII characters. Certain non-
graphic characters appear as C escapes: null=\0,
backspace=\b, formfeed=\f, newline=\n, return=\r,
tab=\t; others appear as 3-digit octal numbers. Bytes
with the parity bit set are displayed in octal.
d Interpret (short) words as unsigned decimal.
f Interpret long words as floating point.
h Interpret (short) words as unsigned hexadecimal.
i Interpret (short) words as signed decimal.
l Interpret long words as signed decimal.
o Interpret (short) words as unsigned octal.
s[n] Look for strings of ascii graphic characters, ter-
minated with a null byte. N specifies the minimum
length string to be recognized. By default, the
minimum length is 3 characters.
v Show all data. By default, display lines that are
identical to the last line shown are not output, but
are indicated with an ``*'' in column 1.
w[n] Specifies the number of input bytes to be interpreted
and displayed on each output line. If w is not speci-
fied, 16 bytes are read for each display line. If n is
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OD(1-BSD) RISC/os Reference Manual OD(1-BSD)
not specified, it defaults to 32.
x Interpret (short) words as hexadecimal.
An upper case format character implies the long or double
precision form of the object.
The offset argument specifies the byte offset into the file
where dumping is to commence. By default this argument is
interpreted in octal. A different radix can be specified;
If ``.'' is appended to the argument, then offset is inter-
preted in decimal. If offset begins with ``x'' or ``0x'',
it is interpreted in hexadecimal. If ``b'' (``B'') is
appended, the offset is interpreted as a block count, where
a block is 512 (1024) bytes. If the file argument is omit-
ted, an offset argument must be preceded by ``+''.
The radix of the displayed address will be the same as the
radix of the offset, if specified; otherwise it will be
octal.
label will be interpreted as a pseudo-address for the first
byte displayed. It will be shown in ``()'' following the
file offset. It is intended to be used with core images to
indicate the real memory address. The syntax for label is
identical to that for offset.
BUGS
A file name argument can't start with ``+''. A hexadecimal
offset can't be a block count. Only one file name argument
can be given.
It is an historical botch to require specification of
object, radix, and sign representation in a single character
argument.
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