Administering the ttymon port monitor
ttymon
is a port monitor invoked by
the Service Access Controller (SAC) to
monitor asynchronous terminal devices,
such as terminals and modems.
From UNIX System V Release 4 onward,
ttymon
performed the functions that
getty
and
uugetty
performed in previous releases.
Like
getty
and
uugetty,
ttymon
sets terminal modes and line speeds
for the port to which the user is connected, allowing
communication with the service associated
with that port.
ttymon differs from getty and uugetty
in several important ways:
-
ttymon
provides any configured service
(such as the shell or a database).
getty
and
uugetty
provided only login service.
-
Each invocation of
ttymon
can support multiple ports.
getty
and
uugetty
supported only one port per invocation.
-
ttymon
is a persistent process that continues to run after the
service process is initiated.
The
getty
and
uugetty
processes were replaced by the process of
the service invoked.
-
ttymon
can take advantage of all
STREAMS I/O
capabilities.
-
Line disciplines are configurable on a per-port basis.
-
ttymon
provides an optional autobaud
facility that automatically
determines the line speed of
the hardware connected to any port monitored by a
ttymon
port monitor.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004