4-10
Booting
4.3.1 Console Environment Variables
Console environment variables are used in booting to modify how
the console commands function.
Environment variables consist of a name and value which are maintained
by the console program. The name is usually made up of characters that
describe the operation, and value is an ASCII string up to 128 characters
in length or an integer.
The environment variable values can be created, modified, displayed, or
deleted using create, set, show, and clear commands. Environment
variables used for system installation and basic operations are listed in Ta-
ble 4-4.
Table 4-4
Environment Variables
Environment Variable
Function
auto_action
Specifies the action that the console takes af-
ter an error halt. Auto_action can be used
for restarting, booting, and halting the sys-
tem. Set auto_action to automatically re-
start after an error halt using the default
boot device defined by bootdef_dev.
baud
Sets the console terminal port baud rate to
300, 600, 1200, 2400, 4800, or 9600, with the
default being 9600.
bootdef_dev
Specifies the default device or device list from
which booting is attempted when the boot
command does not specify a device name.
boot_file
The default file used by the primary boot-
strap when a file name is not specified by the
boot command.
boot_osflags
Additional parameters passed to the system
during booting if none are specified by the
boot command with the -flags qualifier.