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119 lines
3.1 KiB
Groff
119 lines
3.1 KiB
Groff
.\"-
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.\" Copyright (c) 2006 Maxim Sobolev <sobomax@FreeBSD.org>
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.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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.\" 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,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 1, 2006
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.Dt NVRAM 8 powerpc
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.Os
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.Sh NAME
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.Nm nvram
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.Nd "display or modify contents of the EEPROM or NVRAM"
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.Sh SYNOPSIS
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.Nm
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.Fl p
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.Nm
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.Oo Fl d Ar name Oc Ar ...
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.Op Ar name Ns = Ns Ar value ...
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.Sh DESCRIPTION
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The
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.Nm
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utility provides an interface for displaying and changing the system's
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configuration variables contained in EEPROM or NVRAM.
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In the first synopsis form, all available configuration variables and their
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current values are printed.
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In the second form, the variable selected by
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.Ar name
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is either removed or its value is changed to the
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.Ar value
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following by
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.Ql =
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sign.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl d Ar name
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Delete the variable selected by
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.Ar name
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from the EEPROM or NVRAM.
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The
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.Fl d
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flag can be specified multiple times, in which case multiple variables
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will be removed.
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.It Fl p
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Print all available configuration variables and their current values.
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.El
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.Sh EXAMPLES
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Print all available configuration variables and their current values:
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.Pp
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.Dl "nvram -p"
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.Pp
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Remove the variable named
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.Va local-mac-address? :
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.Pp
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.Dl "nvram -d local-mac-address\e?"
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.Pp
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Set the value of the
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.Va local-mac-address?
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variable to
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.Dq Li true :
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.Pp
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.Dl "nvram local-mac-address\e?=true"
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.Pp
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Note that the
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.Ql \e
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in the above examples is used to keep the shell from interpreting the
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.Ql \&? .
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.Pp
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Remove variables named
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.Va foo
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and
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.Va bar
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and set variable named
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.Va baz
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to
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.Dq Li 100 :
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.Pp
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.Dl "nvram -d foo -d bar baz=100"
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.Sh SEE ALSO
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.Xr powermac_nvram 4 ,
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.Xr eeprom 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 7.0 .
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It is inspired by the
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Darwin/Mac OS X
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.Nm
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utility.
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.Sh AUTHORS
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.An Maxim Sobolev Aq sobomax@FreeBSD.org
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.Sh BUGS
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Currently,
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.Nm
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only supports systems equipped with AMD flash and is only tested on Apple
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G4-based Mac Mini machines.
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