XMX(LOCAL) XMX(LOCAL)
8/29/90
NAME
xmx - an X protocol multiplexor
SYNOPSIS
xmx [:displaynum] [-option ...] [display ...]
DESCRIPTION
Xmx is an X protocol multiplexor. It connects to some number of X
servers as a client, then accepts connections, as an X server itself,
from some number of X clients. It passes packets unaltered between
the clients and one controlling server. As it is doing this, it
filters and modifies the requests and passes them along to some number
of slave servers.
The effect is of an X session controlled by one server broadcast to
the other servers. The windows controlled by xmx on the slave servers
do not accept input, they are a visual echo of the controlling
process.
OPTIONS
:displaynum
Specifies the display number for which to be an X server.
This number need not correspond to a real display - in fact it
must not if a real X server is running on the same machine.
-display display
Specifies the name of the master X server to connect to. If
this option is not specified, the value of the environment
variable DISPLAY is used. If DISPLAY is not set, the first
slave server listed becomes the master.
-f filename
Specifies a file which contains a whitespace-separated list of
display names to use as slave servers.
-p Echo pointer motion of master server to slaves.
-i Run in interactive mode. Commands are read from stdin.
-S Run in slave only mode. No controlling X server display is
opened. This option should only be used to run an xmx process
whose only client will be another xmx process. No interaction
is possible unless the topmost xmx has a master X server
connection. This option is used to fan-out multiplexing to
increase speed or overcome system resource limits when
broadcasting to a large number of displays.
-maxfd Set NOFILE to the maximum possible value. On systems that
permit it, the number of active file descriptors is raised to
the system maximum.
- 1 - Formatted: October 29, 2025
XMX(LOCAL) XMX(LOCAL)
8/29/90
-msb num
Increase the size of the outgoing slave socket buffers
(SNDBUF) by a factor of num. Can improve performance
dramatically for protocol intensive applications (clients that
putimage large images will benefit, for instance). However,
making the buffers very large can wedge xmx's host machine.
Setting num larger than 4 is not advised.
-help Print a helpful message describing usage and options.
display...
The list of slave server displays can also be specified on the
command line. If the -f option is also specified, the lists
are merged.
SEE ALSO
rx(LOCAL), X(1), Xserver(1)
BUGS
Pointer motion could be improved. Interactive mode is currently a
hack. Does not support any extensions yet.
AUTHOR
John Bazik
- 2 - Formatted: October 29, 2025
