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OpenDarwin 7.2.1 - man page for nvram (opendarwin section 8)

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nvram(8)										 nvram(8)

NAME
       nvram - manipulate Open Firmware NVRAM variables

SYNOPSIS
       nvram [ -p ] [ -f filename ] [ name ] [= value ] ...

DESCRIPTION
       The nvram command allows manipulation of Open Firmware NVRAM variables.	It can be used to
       get or set a variable.  It can also be used to print all of the variables or set a list of
       variables  from	a  file.   Changes  to NVRAM variables are only saved by clean restart or
       shutdown.

       In principle, name can be any string.  In practice, not all strings will be accepted.  New
       World  machines can create new variables as desired.  Some variables require administrator
       privilege to get or set.

       The given value must match the data type required for name.  Binary data can be set  using
       the  %xx  notation,  where xx is the hex value of the byte.  The type for new variables is
       always binary data.

OPTIONS
       -p     Print all of the Open Firmware variables.

       -f filename
	      Set Open Firmware variables from a text file.  The file must be a  list  name=value
	      statements.   If	the last character of a line is \, the value will be continued to
	      the next line.

EXAMPLES
	      example% nvram boot-args="-s rd=*hd:10"

       Set the boot-args variable to "-s rd=*hd:10".  This would specify single  user  mode  with
       the root device in hard drive partition 10.

	      example% nvram my-variable="String One%00String Two%00%00"

       Create  a new variable, my-variable, containing a list of two C-strings that is terminated
       by a NUL.

					December 12, 2000				 nvram(8)
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