nvram(1M)							     nvram(1M)

NAME    [Toc]    [Back]

     nvram, sgikopt - get or set non-volatile RAM variables

SYNOPSIS    [Toc]    [Back]

     nvram [-v]	[name [value]]
     sgikopt [name...]

DESCRIPTION    [Toc]    [Back]

     nvram can be used to set or print the values of non-volatile RAM
     variables.

     When invoked with no arguments, nvram displays all	known variables	in the
     name=value	form.  The nvram arguments are:

     name    Print the value of	name.

     value   If	name is	defined	in non-volatile	RAM, replace name's definition
	     string with value.

     -v	     Print a line of the form name=value after getting or setting the
	     named variable.

     If	invoked	as sgikopt, more than one name can be given.  names that do
     not match known variables are ignored.

     The exit status is	1 if any arguments do not match	and 0 otherwise.

NOTES    [Toc]    [Back]

     Non-volatile RAM contains a small set of well-known strings at fixed
     offsets.  nvram can not be	used to	define new variables.

     Only the superuser	can set	variables.

     The term "non-volatile RAM" is somewhat misleading, because some
     variables are placed only in volatile RAM and are reset on	power-up.
     Different systems have different mixes of volatile	and non-volatile
     variables.

DIAGNOSTICS    [Toc]    [Back]

     If	an attempt to get or set a variable fails for any reason, nvram	prints
     an	appropriate message on standard	error and exits	with non-zero status.

     Not all systems support the ability to change the contents	of nonvolatile
 memory with the nvram command.  To change	the contents of	nonvolatile
 memory on	systems	that do	not support nvram, you must use	the
     PROM monitor setenv command.

SEE ALSO    [Toc]    [Back]

     prom(1M), sgikopt(2), syssgi(2).


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