Black Box Ioland Utility - Black Box 37687 User Manual

Black Box IOLAND Utility

The Terminal Server peripheral daemon provides a client process with a full-duplex and
transparent interface to a server port of its choice, via a pseudo-tty device. This presents a
tty-like interface to the application in much the same way as a serial port.
The daemon is primarily intended as an interface between the client process and a printer,
modem or some data acquisition device. In the case of printers, it is recommended that the
LPD protocol is first assessed as a suitable printing solution before the Terminal Server
daemon.
By default, the daemon will fork into two processes during the start of a data transfer. The
parent process will transfer data from the client to the server while the child process will
transfer data from the server to the client. The parent also handles all the control aspects of
the client-server link. The child process is normally terminated when the client process
closes the slave pseudo-tty unless the -p option is used. In this case, the child is created at
startup time and remains.
If the daemon is started without any arguments it will try and open the configuration file /etc/
ioland.cf which contains instructions on which daemons to start, for which peripherals, plus
any optional arguments.
Alternatively, a single daemon can be started from the shell with various arguments
specified.
Terminal Server User Guide
Black Box IOLAND Utility
Page 114
Chapter 9 Other devices setup