consvar - Manipulate system firmware console environment variables
/sbin/consvar [-v] [-nc] -g -s -l -a -d [variable] [value]
-v Verbose mode. Prints out the system IDs used by firmware, the current
firmware revision, and information about the process.
Get the value of the specified console environment variable.
-s variable value
Set the value of the specified console environment variable.
-l List the values of all variables supported by this platform that are
not disabled. This is similar to the show SRM console command.
-a Save the values of all environment variables to non-volatile storage.
Setting a variable with the -s option only updates the in-memory copy
of console environment variables. The save process could take a long
time on some platforms, so it is recommended that the variables are
saved after all set operations have been performed.
-d List the system and exception database information.
-nc Do not perform value conversion. Variables that contain device infor-
mation have an underlying console bootstring format. If this option is
used, consvar does not convert between the Tru64 UNIX names for these
devices, but accepts and displays the raw values. The same goes for
integer values which are converted between strings and hexadecimal
Use the consvar command to get, set, list, and save console environment
variables available on SRM system firmware. Some firmware versions on some
platforms do not comply with the Alpha SRM when dealing with certain vari-
ables, or operations. To ensure UNIX functionality with such firmware, an
exception database is consulted and these operations are disabled. By
default, consvar accepts and displays device values with Tru64 UNIX device
names, or their device special file names. The raw console bootstrings can
be used by providing the -nc option. For information regarding the console
environment variables, please refer to the Alpha System Reference Manual.
1. To show the values of all available console variables, enter:
% consvar -l
2. To get the value of the booted_dev variable, enter:
% consvar -g booted_dev
A message similar to the following will be displayed:
booted_dev = disk0
3. To set the value of boot_dev, enter the device name of the required
% consvar -s boot_dev disk0
4. To save the values of the variables across system resets, enter:
% consvar -a
5. If an operation fails, you can find out if it is disabled by using the
-v option. For example, to see if the bootdef_dev variable is dis-
% consvar -v -g bootdef_dev
6. The exception database can be printed out along with the status of the
current platform's console variable support by entering:
% consvar -v -d
Specifies the command path.
Functions: getsysinfo(2), setsysinfo(2)