1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2003 Scott Long 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD: src/share/man/man9/hexdump.9,v 1.6 2010/04/14 19:08:06 uqs Exp $ 30.\" 31.Dd December 1, 2010 32.Dt HEXDUMP 9 33.Os 34.Sh NAME 35.Nm hexdump 36.Nd "dump a block of bytes to the console in hexadecimal form" 37.Sh SYNOPSIS 38.In sys/systm.h 39.Ft void 40.Fn hexdump "const void *ptr" "int length" "const char *hdr" "int flags" 41.Sh DESCRIPTION 42The 43.Fn hexdump 44function prints an array of bytes to the console in hexadecimal form, along with 45the 46.Tn ASCII 47representation of the bytes, if possible. 48By default, each line of 49output will start with an offset count, followed by 16 hexadecimal values, 50followed by 16 51.Tn ASCII 52characters. 53.Bl -tag -width indent 54.It Fa ptr 55Pointer to the array of bytes to print. 56It does not need to be 57.Dv NUL Ns 58-terminated. 59.It Fa length 60Number of bytes to print. 61.It Fa hdr 62Pointer to a 63.Dv NUL Ns 64-terminated character string that will be prepended to each 65line of output. 66A value of 67.Dv NULL 68implies that no header will be printed. 69.It Fa flags 70Flags for controlling the formatting of the output. 71.Bl -tag -width ".Dv HD_OMIT_COUNT" 72.It Bits 0-7 73Integer value of the number of bytes to display on each line. 74A value of 0 implies that the default value of 16 will be used. 75.It Bits 8-15 76Character 77.Tn ASCII 78value to use as the separator for the hexadecimal output. 79A value of 0 implies that the default value of 32 80.Tn ( ASCII 81space) will be used. 82.It Dv HD_OMIT_COUNT 83Do not print the offset column at the beginning of each line. 84.It Dv HD_OMIT_HEX 85Do not print the hexadecimal values on each line. 86.It Dv HD_OMIT_CHARS 87Do not print the character values on each line. 88.El 89.El 90.Sh SEE ALSO 91.Xr ascii 7 , 92.Xr hexncpy 9 93.Sh AUTHORS 94This manual page was written by 95.An Scott Long . 96