conscontrol -- control physical console devices
conscontrol mute on | off
conscontrol add | delete console
The conscontrol utility is used to examine and modify the physical
devices which back the virtual console devices. If no arguments (or only
the list command) are specified, the current console settings are shown.
There are two types of logical consoles; a high level console which is
represented by /dev/console, and a low level console. The low level console
is used for kernel printf(9) and ddb(4) debugger support, while the
high level console is used by user programs like syslogd(8). Multiple
device support is implemented only for the low level console; the high
level console is set to the first device in the console list.
Multiple console support may be invoked by passing the kernel the -D flag
from the boot loader, or by using conscontrol to change the list of console
devices after the system has booted.
The following options are available:
add | delete console
Add or delete a physical device from the logical console. The
device must support low-level console operations. Adding a
device will place it at the front of the list of console devices;
the first device is used for the high level console.
mute on | off
Change the state of console muting. All console output is suppressed
when console muting is on.
sio(4), syscons(4), boot(8), loader(8)
The conscontrol utility first appeared in FreeBSD 5.0.
FreeBSD 5.2.1 October 23, 2001 FreeBSD 5.2.1 [ Back ]