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.\" Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
.\" All rights reserved.
.\"
.\" 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 AUTHOR ``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 AUTHOR OR CONTRIBUTORS 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 October 18, 2002
.Dt OFWDUMP 8
.Os
.Sh NAME
.Nm ofwdump
.Nd examine the Open Firmware device tree
.Sh SYNOPSIS
.Nm
.Fl a
.Op Fl p | P Ar property
.Op Fl R | S
.Nm
.Op Fl p | P Ar property
.Op Fl r
.Op Fl R | S
.Op Fl -
.Ar nodes
.Sh DESCRIPTION
The
.Nm
utility is used to examine the Open Firmware device tree.
In the first synopsis form, the complete device tree is printed; in the
second form, only the selected
.Ar nodes
will be examined.
.Pp
The following options are available:
.Bl -tag -width ".Fl P Ar property"
.It Fl a
Print the complete device tree.
.It Fl p
Print all available properties.
.It Fl P Ar property
Only print properties of the given name.
.It Fl R
Print properties in
.Dq raw
format, i.e., omit all headings and indentation and just write the
property values unaltered to the standard output.
This is intended to be used with the
.Fl P
option to extract the value of a single property.
.It Fl S
Print properties as strings; this is analogous to the
.Fl R
option, except that each property is only output to the first
.Dv NUL
character, and that newline is appended to each.
.It Fl r
Recursively print all children of the specified nodes.
.El
.Sh EXAMPLES
Print the complete device tree:
.Pp
.Dl "ofwdump -a"
.Pp
Print the complete device subtree of the
.Dq Li /pci
node, including all available properties:
.Pp
.Dl "ofwdump -pr /pci"
.Pp
Print the
.Dq Li compatible
property of the
.Dq Li /pci
node as plain string:
.Pp
.Dl "ofwdump -P compatible -S /pci"
.Sh SEE ALSO
.Xr eeprom 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 5.0 .
.Sh AUTHORS
The
.Nm
utility
was written by
.An Thomas Moestl Aq Mt tmm@FreeBSD.org .
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