Telserv Manual

Subsystem Control Facility (SCF) for Telserv

Telserv Manual—427174-009

4-7

Setting the Initial Output Destination

To specify an initial output destination for an SCF session, use the OUT option of the

RUN command. You can specify a terminal (identified by its logical-device name), a

disk file, an application process, or a printer. For example, the following RUN command

initiates SCF and directs it to send its output to a disk file named $DATA.SCF.DISPLAY

(if not specified, the system name and volume name are the default names currently in

use by the TACL command interpreter through which the RUN command was entered):

20> SCF / OUT $DATA.SCF.DISPLAY /

If you run SCF without specifying an output file, SCF assumes that the output is being

sent to your terminal.

Running SCF

You can start SCF interactively by using the TACL command interpreter RUN

command or by using a command file (or TACL macro or routine). The RUN command

used to start SCF is described in this section and in the TACL Reference Manual.

All the SCF commands are described in Appendix C, SCF Command Syntax.

SCF usually resides in a file named $SYSTEM.SYSTEM.SCF.

General Command Format

An SCF command always begins with a keyword identifying the command (such as,

START, VOLUME, or TRACE).

If the command pertains only to the current SCF session, the keyword is followed

immediately by whatever additional parameters are required to specify the action to be

taken by SCF. For example, the SYSTEM command can be entered as

SYSTEM \newsys, where newsys is the name of the system that is to become the

default system.

If the command pertains to an object, it is followed immediately by the object type and

the object name. For example, the following command aborts the LINE object called

$LIN32:

ABORT LINE $LIN32

This command aborts a subdevice on that line:

ABORT SU $LIN32.#PC

If additional information is required, the object name is followed by a comma and the

parameters required to further specify the action to be taken. For example, the

following command changes the value of the BCUG attribute for a line:

ALTER LINE $LIN32, BCUG 200