98 lines
3.0 KiB
Groff
98 lines
3.0 KiB
Groff
.\"
|
|
.\" Copyright (c) 2001 Jonathan Lemon <jlemon@FreeBSD.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd October 23, 2001
|
|
.Dt CONSCONTROL 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm conscontrol
|
|
.Nd control physical console devices
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Cm list
|
|
.Nm
|
|
.Cm mute on | off
|
|
.Nm
|
|
.Cm add | delete
|
|
.Ar console
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility is used to examine and modify the physical devices which back
|
|
the virtual console devices.
|
|
If no arguments
|
|
(or only the
|
|
.Cm list
|
|
command)
|
|
are specified,
|
|
the current console settings are shown.
|
|
.Pp
|
|
There are two types of logical consoles; a high level console which
|
|
is represented by
|
|
.Pa /dev/console ,
|
|
and a low level console.
|
|
The low level console is used for kernel
|
|
.Xr printf 9
|
|
and
|
|
.Xr ddb 4
|
|
debugger support,
|
|
while the high level console is used by user programs like
|
|
.Xr 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.
|
|
.Pp
|
|
Multiple console support may be invoked by passing the kernel the
|
|
.Fl D
|
|
flag from the boot loader, or by using
|
|
.Nm
|
|
to change the list of console devices after the system has booted.
|
|
.Pp
|
|
The following options are available:
|
|
.Bl -tag -width indent
|
|
.It Cm add | delete Ar 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.
|
|
.It Cm mute on | off
|
|
Change the state of console muting.
|
|
All console output is suppressed when console muting is
|
|
.Cm on .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr sio 4 ,
|
|
.Xr syscons 4 ,
|
|
.Xr boot 8 ,
|
|
.Xr loader 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility first appeared in
|
|
.Fx 5.0 .
|
|
.Sh AUTHORS
|
|
.An Jonathan Lemon
|