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.Dd June 19, 2020 27.Dt NVRAM 8 powerpc 28.Os 29.Sh NAME 30.Nm nvram 31.Nd "display or modify contents of the EEPROM or NVRAM" 32.Sh SYNOPSIS 33.Nm 34.Fl p 35.Nm 36.Oo Fl d Ar name Oc Ar ... 37.Op Ar name Ns = Ns Ar value ... 38.Sh DESCRIPTION 39The 40.Nm 41utility provides an interface for displaying and changing the system's 42configuration variables contained in EEPROM or NVRAM. 43In the first synopsis form, all available configuration variables and their 44current values are printed. 45In the second form, the variable selected by 46.Ar name 47is either removed or its value is changed to the 48.Ar value 49following by 50.Ql = 51sign. 52.Pp 53The following options are available: 54.Bl -tag -width indent 55.It Fl d Ar name 56Delete the variable selected by 57.Ar name 58from the EEPROM or NVRAM. 59The 60.Fl d 61flag can be specified multiple times, in which case multiple variables 62will be removed. 63.It Fl p 64Print all available configuration variables and their current values. 65.El 66.Sh EXAMPLES 67Print all available configuration variables and their current values: 68.Pp 69.Dl "nvram -p" 70.Pp 71Remove the variable named 72.Va local-mac-address? : 73.Pp 74.Dl "nvram -d local-mac-address\e?" 75.Pp 76Set the value of the 77.Va local-mac-address? 78variable to 79.Dq Li true : 80.Pp 81.Dl "nvram local-mac-address\e?=true" 82.Pp 83Note that the 84.Ql \e 85in the above examples is used to keep the shell from interpreting the 86.Ql \&? . 87.Pp 88Remove variables named 89.Va foo 90and 91.Va bar 92and set variable named 93.Va baz 94to 95.Dq Li 100 : 96.Pp 97.Dl "nvram -d foo -d bar baz=100" 98.Sh SEE ALSO 99.Xr powermac_nvram 4 100.Sh HISTORY 101The 102.Nm 103utility first appeared in 104.Fx 7.0 . 105It is inspired by the 106Darwin/Mac OS X 107.Nm 108utility. 109.Sh AUTHORS 110.An Maxim Sobolev Aq Mt sobomax@FreeBSD.org 111