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Devicesttymux(7D)


NAME

 ttymux - Serial I/O multiplexing STREAMS device driver

SYNOPSIS

 
multiplexer@0,0:input
 
multiplexer@0,0:output

DESCRIPTION

 

ttymux is a STREAMS multiplexer driver that connects multiple serial devices to the system console. Using this driver, input from multiple physical devices can be multiplexed onto a single input stream for the system console. Output written to the console can be distributed to multiple physical devices to provide redundant console interfaces to a system. Input and output can be multiplexed to or from a separate list of devices.

ttymux is a STREAM's multiplexer for serial drivers (such as se(7D)) that comply with the Solaris terminal subsystem interface.

Currently, multiplexer interfaces are provided for system console I/O only and not for general serial I/O multiplexing. Multiplexer interfaces are currently not available for all platforms. Please see NOTES.

FILES

 
/kernel/drv/sparcv9/ttymux
64- bit ELF kernel module

ATTRIBUTES

 

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
ArchitectureSPARC (NetraCT series only)

SEE ALSO

 

se(7D), termio(7I)

Writing Device Drivers

NOTES

 

Successful loading of this driver and its services depends on the EEPROM or NVRAM settings in effect at the most recent system reboot. Without the platform firmware support, this feature cannot be enabled. Currently, this support is provided only on a NetraCT product family.

Use caution when enabling this feature to perform console input multiplexing, particularly during super-user login. Because no security measures are enabled when the driver is in operation, you must clearly understand the security implications involved in using this feature and take appropriate measures to provide maximum protection to the host. This can include such steps as enabling input to physically secured console devices only.

The ttymux driver does not handle the behavioral differences in control characteristics of different terminal types (for example, an ESCAPE sequence.) As a result, multiple terminal types are not supported simultaneously. Please refer to the platform user guide for more information.


SunOS 5.9Go To TopLast Changed 20 Jul 2001

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.