1.\"- 2.\" Copyright (c) 2006 Maxim Sobolev <sobomax@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 18.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 20.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 22.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24.\" POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd June 19, 2020 29.Dt NVRAM 8 powerpc 30.Os 31.Sh NAME 32.Nm nvram 33.Nd "display or modify contents of the EEPROM or NVRAM" 34.Sh SYNOPSIS 35.Nm 36.Fl p 37.Nm 38.Oo Fl d Ar name Oc Ar ... 39.Op Ar name Ns = Ns Ar value ... 40.Sh DESCRIPTION 41The 42.Nm 43utility provides an interface for displaying and changing the system's 44configuration variables contained in EEPROM or NVRAM. 45In the first synopsis form, all available configuration variables and their 46current values are printed. 47In the second form, the variable selected by 48.Ar name 49is either removed or its value is changed to the 50.Ar value 51following by 52.Ql = 53sign. 54.Pp 55The following options are available: 56.Bl -tag -width indent 57.It Fl d Ar name 58Delete the variable selected by 59.Ar name 60from the EEPROM or NVRAM. 61The 62.Fl d 63flag can be specified multiple times, in which case multiple variables 64will be removed. 65.It Fl p 66Print all available configuration variables and their current values. 67.El 68.Sh EXAMPLES 69Print all available configuration variables and their current values: 70.Pp 71.Dl "nvram -p" 72.Pp 73Remove the variable named 74.Va local-mac-address? : 75.Pp 76.Dl "nvram -d local-mac-address\e?" 77.Pp 78Set the value of the 79.Va local-mac-address? 80variable to 81.Dq Li true : 82.Pp 83.Dl "nvram local-mac-address\e?=true" 84.Pp 85Note that the 86.Ql \e 87in the above examples is used to keep the shell from interpreting the 88.Ql \&? . 89.Pp 90Remove variables named 91.Va foo 92and 93.Va bar 94and set variable named 95.Va baz 96to 97.Dq Li 100 : 98.Pp 99.Dl "nvram -d foo -d bar baz=100" 100.Sh SEE ALSO 101.Xr powermac_nvram 4 102.Sh HISTORY 103The 104.Nm 105utility first appeared in 106.Fx 7.0 . 107It is inspired by the 108Darwin/Mac OS X 109.Nm 110utility. 111.Sh AUTHORS 112.An Maxim Sobolev Aq Mt sobomax@FreeBSD.org 113