FCONTROL with a controlcode
value of 38 allows you to change the terminal type associated with
a port to another system defined terminal type. The new terminal
type will be in effect for the port until you change it through
another FCONTROL call, or until the device is closed. When the device
is closed, the port is reset to its configured default.
If you change the terminal type of a terminal running an interactive
session, you should be sure to reset it to the previously assigned
terminal type when your program ends, unless you want the new terminal
type to be in effect for other files opened on the device. To be
sure you are able to reset to the previous terminal type, your program
should call FCONTROL(39) to determine the current terminal type
before calling FCONTROL(38) to change to the new setting. (Note
that the current terminal type may be different from the default
(configured) terminal type.)
The terminal type specified by FCONTROL(38) must be a system
defined terminal type currently supported on MPE/iX systems. If
any other value is used, the intrinsic will return an error condition
of CCL.
You cannot use FCONTROL to change to or from a user defined
terminal type. You must use FDEVICECONTROL to perform this function
with terminal types defined through Workstation Configurator.
If issued against a terminal connected via PAD, DTC Telnet,
or Telnet/iX, this call will change the terminal type setting, but
will have no impact on how the device actually operates. A CCE condition
code will be returned.
If issued against a terminal connected via VT from an MPE/iX
or MPE V local client, this call will change the terminal type setting
and the characteristics of the terminal type supported by VT. The
controlcode value is not supported for VT
connections from a PC or HP-UX local client.
