Getting Started with DECTPU 2.6 Using OpenVMS EDIT/TPU Command Qualifiers

$ EDIT/TPU/NOJOURNAL memo.txt

If you are developing an application layered on DECTPU, you can use the built-in JOURNAL_OPEN to direct DECTPU to create a keystroke journal file for an editing session. Using JOURNAL_OPEN causes DECTPU to provide a 500-byte buffer in which to journal keystrokes. By default, DECTPU writes the contents of the buffer to the journal file when the buffer is full.

You can use the built-in procedure SET (JOURNALING) to turn on buffer-change journaling, even if you have used /NOJOURNAL to turn it off initially. You can also use SET (JOURNALING) to adjust the journaling frequency.

For more information on JOURNAL_OPEN and SET (JOURNALING), see the DEC Text Processing Utility Reference Manual. For more information on buffer-change journaling, see Section 2.4.

Once a keystroke journal file is created, use the /RECOVER qualifier to direct DECTPU to process the commands in the keystroke journal file. For example, the following command causes DECTPU to recover a previous editing session on an input file named MEMO.TXT. Because the journal file has a name different from the input file name, both /JOURNAL and /RECOVER are used. The name of the keystroke journal file is MEMO.TJL:

$ EDIT/TPU/RECOVER/JOURNAL=memo.tjl memo.txt

In buffer-change journaling, to recover the changes made to a specified buffer, use the RECOVER_BUFFER built-in procedure.

For more information on RECOVER_BUFFER, see the DEC Text Processing Utility Reference Manual. For more information on how to recover from an interrupted EVE editing session, see the Extensible Versatile Editor Reference Manual.

Note

Compaq strongly recommends the use of buffer-change journaling rather than keystroke journaling.

2.6.9 /MODIFY

/MODIFY (default)

/NOMODIFY

The /MODIFY qualifier determines whether the first user buffer in an editing session is modifiable. The application layered on DECTPU is responsible for processing /MODIFY.

To determine what form of the /MODIFY qualifier was used on the DCL command line, use the following calls:

x := GET_INFO (COMMAND_LINE, "modify");

x := GET_INFO (COMMAND_LINE, "nomodify");

The first statement returns 1 if /MODIFY was explicitly specified on the command line, 0 otherwise. The second statement returns 1 if /NOMODIFY was explicitly specified on the command line, 0 otherwise. If both statements return 0, then the application is expected to determine the default behavior.

For more information on GET_INFO, see the DEC Text Processing Utility Reference Manual.

Getting Started with DECTPU 2–15

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Compaq AA-PWCBD-TE manual 9 /MODIFY, $ EDIT/TPU/NOJOURNAL memo.txt, $ EDIT/TPU/RECOVER/JOURNAL=memo.tjl memo.txt, Nomodify
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