mirror of
https://github.com/freebsd/freebsd-src
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bdcbfde31e
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
280 lines
6.5 KiB
Groff
280 lines
6.5 KiB
Groff
.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd December 22, 2011
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.Dt OD 1
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.Os
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.Sh NAME
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.Nm od
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.Nd octal, decimal, hex, ASCII dump
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.Sh SYNOPSIS
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.Nm
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.Op Fl aBbcDdeFfHhIiLlOosvXx
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.Op Fl A Ar base
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.Op Fl j Ar skip
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.Op Fl N Ar length
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.Op Fl t Ar type
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.Op Oo Cm + Oc Ns Ar offset Ns Oo Cm \&. Oc Ns Op Cm Bb
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.Op Ar
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.Sh DESCRIPTION
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The
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.Nm
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utility is a filter which displays the specified files, or standard
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input if no files are specified, in a user specified format.
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.Pp
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The options are as follows:
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.Bl -tag -width ".Fl I , L , l"
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.It Fl A Ar base
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Specify the input address base.
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The argument
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.Ar base
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may be one of
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.Cm d ,
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.Cm o ,
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.Cm x
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or
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.Cm n ,
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which specify decimal, octal, hexadecimal
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addresses or no address, respectively.
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.It Fl a
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Output named characters.
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Equivalent to
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.Fl t Cm a .
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.It Fl B , o
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Output octal shorts.
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Equivalent to
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.Fl t Cm o2 .
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.It Fl b
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Output octal bytes.
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Equivalent to
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.Fl t Cm o1 .
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.It Fl c
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Output C-style escaped characters.
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Equivalent to
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.Fl t Cm c .
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.It Fl D
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Output unsigned decimal ints.
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Equivalent to
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.Fl t Cm u4 .
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.It Fl d
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Output unsigned decimal shorts.
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Equivalent to
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.Fl t Cm u2 .
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.It Fl e , F
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Output double-precision floating point numbers.
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Equivalent to
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.Fl t Cm fD .
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.It Fl f
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Output single-precision floating point numbers.
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Equivalent to
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.Fl t Cm fF .
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.It Fl H , X
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Output hexadecimal ints.
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Equivalent to
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.Fl t Cm x4 .
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.It Fl h , x
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Output hexadecimal shorts.
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Equivalent to
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.Fl t Cm x2 .
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.It Fl I , L , l
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Output signed decimal longs.
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Equivalent to
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.Fl t Cm dL .
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.It Fl i
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Output signed decimal ints.
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Equivalent to
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.Fl t Cm dI .
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.It Fl j Ar skip
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Skip
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.Ar skip
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bytes of the combined input before dumping.
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The number may be followed by one
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of
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.Cm b , k
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or
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.Cm m
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which specify the units of the number as blocks (512 bytes), kilobytes and
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megabytes, respectively.
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.It Fl N Ar length
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Dump at most
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.Ar length
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bytes of input.
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.It Fl O
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Output octal ints.
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Equivalent to
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.Fl t Cm o4 .
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.It Fl s
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Output signed decimal shorts.
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Equivalent to
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.Fl t Cm d2 .
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.It Fl t Ar type
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Specify the output format.
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The
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.Ar type
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argument
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is a string containing one or more of the following kinds of type specifiers:
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.Bl -tag -width indent
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.It Cm a
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Named characters
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.Pq ASCII .
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Control characters are displayed using the following names:
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.Bl -column "000 NUL" "001 SOH" "002 STX" "003 ETX" "004 EOT" "005 ENQ"
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.It "000 NUL 001 SOH 002 STX 003 ETX 004 EOT 005 ENQ"
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.It "006 ACK 007 BEL 008 BS 009 HT 00A NL 00B VT"
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.It "00C FF 00D CR 00E SO 00F SI 010 DLE 011 DC1"
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.It "012 DC2 013 DC3 014 DC4 015 NAK 016 SYN 017 ETB"
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.It "018 CAN 019 EM 01A SUB 01B ESC 01C FS 01D GS"
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.It "01E RS 01F US 020 SP 07F DEL \& \&"
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.El
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.It Cm c
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Characters in the default character set.
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Non-printing characters are
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represented as 3-digit octal character codes, except the following
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characters, which are represented as C escapes:
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.Pp
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.Bl -tag -width carriage-return -compact
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.It NUL
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\e0
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.It alert
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\ea
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.It backspace
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\eb
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.It newline
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\en
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.It carriage-return
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\er
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.It tab
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\et
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.It vertical tab
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\ev
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.El
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.Pp
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Multi-byte characters are displayed in the area corresponding to the first
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byte of the character.
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The remaining bytes are shown as
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.Ql ** .
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.It Xo
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.Sm off
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.Op Cm d | o | u | x
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.Op Cm C | S | I | L | Ar n
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.Sm on
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.Xc
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Signed decimal
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.Pq Cm d ,
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octal
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.Pq Cm o ,
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unsigned decimal
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.Pq Cm u
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or
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hexadecimal
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.Pq Cm x .
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Followed by an optional size specifier, which may be either
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.Cm C
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.Pq Vt char ,
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.Cm S
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.Pq Vt short ,
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.Cm I
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.Pq Vt int ,
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.Cm L
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.Pq Vt long ,
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or a byte count as a decimal integer.
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.It Xo
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.Sm off
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.Cm f
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.Op Cm F | D | L | Ar n
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.Sm on
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.Xc
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Floating-point number.
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Followed by an optional size specifier, which may be either
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.Cm F
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.Pq Vt float ,
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.Cm D
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.Pq Vt double
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or
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.Cm L
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.Pq Vt "long double" .
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.El
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.It Fl v
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Write all input data, instead of replacing lines of duplicate values with a
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.Ql * .
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.El
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.Pp
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Multiple options that specify output format may be used; the output will
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contain one line for each format.
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.Pp
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If no output format is specified,
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.Fl t Cm oS
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is assumed.
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.Sh ENVIRONMENT
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The
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.Ev LANG , LC_ALL
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and
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.Ev LC_CTYPE
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environment variables affect the execution of
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.Nm
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as described in
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.Xr environ 7 .
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.Sh EXIT STATUS
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.Ex -std
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.Sh EXAMPLES
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Dump stdin and show the output using named characters and C-style escaped
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characters:
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.Bd -literal -offset indent
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$ echo "FreeBSD: The power to serve" | od -a -c
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0000000 F r e e B S D : sp T h e sp p o w
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F r e e B S D : T h e p o w
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0000020 e r sp t o sp s e r v e nl
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e r t o s e r v e \en
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0000034
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.Ed
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.Pp
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Dump stdin skipping the first 13 bytes using named characters and dumping no
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more than 5 bytes:
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.Bd -literal -offset indent
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$ echo "FreeBSD: The power to serve" | od -An -a -j 13 -N 5
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p o w e r
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.Ed
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.Sh COMPATIBILITY
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The traditional
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.Fl s
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option to extract string constants is not supported; consider using
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.Xr strings 1
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instead.
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.Sh SEE ALSO
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.Xr hexdump 1 ,
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.Xr strings 1
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.Sh STANDARDS
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The
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.Nm
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utility conforms to
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.St -p1003.1-2001 .
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.Sh HISTORY
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An
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.Nm
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command appeared in
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.At v1 .
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