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NAME    [Toc]    [Back]

     conscontrol -- control physical console devices

SYNOPSIS    [Toc]    [Back]

     conscontrol [list]
     conscontrol mute on | off
     conscontrol add | delete console

DESCRIPTION    [Toc]    [Back]

     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.

SEE ALSO    [Toc]    [Back]

     sio(4), syscons(4), boot(8), loader(8)

HISTORY    [Toc]    [Back]

     The conscontrol utility first appeared in FreeBSD 5.0.

AUTHORS    [Toc]    [Back]

     Jonathan Lemon

FreeBSD 5.2.1		       October 23, 2001 		 FreeBSD 5.2.1
[ Back ]
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