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.\" -*- nroff -*-
.\"
.\" Copyright (c) 2003 Scott Long
.\"
.\" All rights reserved.
.\"
.\" This program is free software.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd December 7, 2003
.Os
.Dt HEXDUMP 9
.Sh NAME
.Nm hexdump
.Nd "dump a block of bytes to the console in hexadecimal form"
.Sh SYNOPSIS
.In sys/systm.h
.Ft void
.Fn hexdump "void *ptr" "int length" "const char *hdr" "int flags"
.Sh DESCRIPTION
The
.Fn hexdump
function prints an array of bytes to the console in hexadecimal form, along with
the
.Tn ASCII
representation of the bytes, if possible.
By default, each line of
output will start with an offset count, followed by 16 hexadecimal values,
followed by 16
.Tn ASCII
characters.
.Bl -tag -width indent
.It Fa ptr
Pointer to the array of bytes to print.
It does not need to be
.Dv NUL Ns
-terminated.
.It Fa length
Number of bytes to print.
.It Fa hdr
Pointer to a
.Dv NUL Ns
-terminated character string that will be prepended to each
line of output.
A value of
.Dv NULL
implies that no header will be printed.
.It Fa flags
Flags for controlling the formatting of the output.
.Bl -tag -width ".Dv HD_OMIT_COUNT"
.It Bits 0-7
Integer value of the number of bytes to display on each line.
A value of 0 implies that the default value of 16 will be used.
.It Bits 8-15
Character
.Tn ASCII
value to use as the separator for the hexadecimal output.
A value of 0 implies that the default value of 32
.Tn ( ASCII
space) will be used.
.It Dv HD_OMIT_COUNT
Do not print the offset column at the beginning of each line.
.It Dv HD_OMIT_HEX
Do not print the hexadecimal values on each line.
.It Dv HD_OMIT_CHARS
Do not print the character values on each line.
.El
.El
.Sh SEE ALSO
.Xr ascii 7
.Sh AUTHORS
This manual page was written by
.An Scott Long .
|
