NetBSD/share/man/man4/wsmux.4

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.\" $NetBSD: wsmux.4,v 1.14 2017/06/13 08:10:52 wiz Exp $
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.\"
.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 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
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.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.Dd June 13, 2017
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.Dt WSMUX 4
.Os
.Sh NAME
.Nm wsmux
.Nd console keyboard/mouse multiplexor for wscons
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.Sh SYNOPSIS
.Cd "wskbd* at ... mux 1"
.Cd "wsbell* at ... mux 1"
.Cd "wsmouse* at ... mux 0"
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.Pp
.Cd pseudo-device wsmux
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.Sh DESCRIPTION
The
.Nm
is a pseudo-device driver that allows several
.Xr wscons 4
input devices to have their events multiplexed into one stream.
.Pp
The typical usage for this device is to have two multiplexors, one
for mouse events and one for keyboard and bell events.
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All
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.Xr wsmouse 4
devices should direct their events to the mouse mux (normally 0)
and all keyboard devices, except the console, should direct their
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events to the keyboard mux (normally 1).
A device will send its events to the mux indicated by the
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.Va mux
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locator.
If none is given the device will not use a multiplexor.
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The keyboard multiplexor should be connected to the display, using
the
.Xr wsconscfg 8
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command.
It will then receive all keystrokes from all keyboards
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and, furthermore, keyboards can be dynamically attached and detached without
further user interaction.
Additionally, bell events generated for the display will be directed to
all attached
.Xr wsbell 4
devices.
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In a similar way, the window system will open the mouse multiplexor
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and receive all mouse events; mice can also be dynamically attached
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and detached.
.Pp
If a
.Xr wskbd 4 ,
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.Xr wsbell 4 ,
or
.Xr wsmouse 4
device is opened despite having a mux it will be detached from the mux.
.Pp
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It is also possible to inject events into a multiplexor from a
user program.
.\" This is used by the
.\" .Xr moused 8
.\" daemon to take data from a mouse connected to a serial port and
.\" make it appear on the standard mouse mux.
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.Sh FILES
For each mux device,
.Pa /dev/wsmuxN
there is a control device
.Pa /dev/wsmuxctlN .
The control device has a minor number 128 greater than the regular
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mux device.
It can be used to control the mux even when it is open,
e.g., by
.Xr wsmuxctl 8 .
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.Bl -item
.It
.Pa /dev/wsmouse
a.k.a.
.Pa /dev/wsmux0
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.It
.Pa /dev/wskbd
a.k.a.
.Pa /dev/wsmux1
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.It
.Pa /usr/include/dev/wscons/wsconsio.h
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.El
.Sh SEE ALSO
.Xr wsbell 4 ,
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.Xr wscons 4 ,
.Xr wsdisplay 4 ,
.Xr wskbd 4 ,
.Xr wsmouse 4 ,
.Xr moused 8 ,
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.Xr wsconscfg 8 ,
.Xr wsconsctl 8 ,
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.Xr wsfontload 8 ,
.Xr wsmoused 8 ,
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.Xr wsmuxctl 8