HP 3000 Manuals HP 3000 Manuals
Command I/O Redirection
by Scott Cressler, Jeff Vance, and Rich Webber
Commercial Systems Division
Command I/O Redirection, CIOR, gives you the ability to redirect the
input or output of Command Interpreter (CI) commands. Redirection means
that CI commands would be able to send their output to or take their
input from a file other than the terminal, such as a disk file or line
printer.
Command I/O Redirection is directed at fairly advanced users of MPE XL,
such as system managers and system programmers. It allows them to easily
capture any screen output to a file. It also allows them to provide
predefined or canned input to commands or programs which normally take
input from the terminal. CIOR is also useful for any user of the CI who
wants to save output of some command for printing or mailing. CIOR is an
integral part of the MPE XL Command Interpreter.
CIOR FEATURES
The features provided by Command I/O Redirection are:
* Input and output of a command may be redirected to a file. (The
following commands cannot use redirection: CALC, COMMENT, ELSEIF,
IF, REMOTE, SETVAR, SETJCW, TELL, TELLOP, WARN, and WHILE.)
* The redirection is handled by the CI. That is, command executors,
User Commands, (UDCs and command files) and programs need not be
modified to take advantage of this feature.
* CIOR is available from a session, in jobs, programmatically
(through the COMMAND and HPCICOMMAND intrinsics), and in BREAK
mode.
* Defaults are provided for opening files for input or output
redirection. These may be overridden, however, by providing a
backreference to a file equation for the file to which I/O is to
be redirected.
For more detailed information, please refer to the related article in the
"Technical Articles" section in this Communicator.