ttymux(7D) Devices ttymux(7D)NAMEttymux - Serial I/O multiplexing STREAMS device driver
SYNOPSIS
multiplexer@0,0:input
multiplexer@0,0:output
DESCRIPTIONttymux 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 inter‐
faces are currently not available for all platforms. Please see NOTES.
FILES
/kernel/drv/sparcv9/ttym64- bit ELF kernel module
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │SPARC (NetraCT series only) │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOse(7D), termio(7I)
Writing Device Drivers
NOTES
Successful loading of this driver and its services depends on the EEP‐
ROM or NVRAM settings in effect at the most recent system reboot. With‐
out the platform firmware support, this feature cannot be enabled. Cur‐
rently, this support is provided only on a NetraCT product family.
Use caution when enabling this feature to perform console input multi‐
plexing, particularly during super-user login. Because no security mea‐
sures 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 infor‐
mation.
SunOS 5.10 20 Jul 2001 ttymux(7D)
