On OpenVMS Alpha and Integrity servers, the XA Gateway Control Program utility (XGCP) provides the management interface to the DECdtm XA Gateway and creates the transaction logs used by the DECdtm XA Gateway. It can also be used to stop and restart the XA Gateway server.

The Gateway allows a DECdtm-compliant resource manager, such as RMS Journaling or Oracle Rdb, to be used with an XA-compliant transaction manager.

26.2 XGCP Commands

The following table summarizes XGCP commands:

Command	Description
CREATE_LOG	Creates a new XA Gateway log
EXIT	Exits XGCP
START_SERVER	Starts the XA Gateway server
STOP_SERVER	Stops the XA Gateway server

26.3 XGCP Usage Summary

Format

RUN SYS$SYSTEM: XGCP

Description

To invoke XGCP, enter the following command at the DCL prompt:

$ RUN SYS$SYSTEM:XGCP

XGCP displays the following prompt, at which you can enter any XGCP command:

XGCP>

To exit from XGCP, enter the EXIT command at the XGCP prompt, or press Ctrl/Z.

Creates a new XA Gateway log. Requires SYSPRV privilege or read/write access to the SYS$JOURNAL directory.

Format

CREATE_LOG /GATEWAY_NAME=name /SIZE=size

Parameters

None.

Qualifiers

/GATEWAY_NAME=name

This qualifier is required. Specify a gateway name of up to 15 characters.

Creates a gateway log named SYS$JOURNAL:name.DDTM$XG_JOURNAL. Create a separate Gateway log for each Gateway name under which you want your XA applications to run.

/SIZE=size

Specifies the initial size of the log, in blocks. If you omit this qualifier, the log is created with an initial size of 242 blocks. The log file is automatically expanded in size when necessary.

Example

XGCP> CREATE_LOG/GATEWAY_NAME=MYLOG1/SIZE=150
      

The command in this example creates a gateway log named SYS$JOURNAL:MYLOG1.DDTM$XG_JOURNAL. Its initial size is 150 blocks.

Exits XGCP. You can also press Ctrl/Z to exit from XGCP.

Format

EXIT

Parameters

None.

Qualifiers

None.

Starts the XA Gateway server. Requires IMPERSONATE privilege.

Format

START_SERVER

Parameters

None.

Qualifiers

None.

Example

XGCP> START_SERVER
      

The command in this example executes the DCL command file SYS$STARTUP:DDTM$XG_STARTUP.COM, which starts the server process called DDTM$XG_SERVER.

Stops the XA Gateway server process, called DDTM$XG_SERVER, on the current node.

Requires OPER, SYSPRV and AUDIT privileges.

Format

STOP_SERVER

Parameters

None.

Qualifiers

None.

Example

XGCP> STOP_SERVER
      

The command in this example stops the Gateway server process, called DDTM$XG_SERVER.

By default, the access control list editor (ACL editor) prompts you for each access control entry (ACE) and provides values for some of the fields within an ACE. You can navigate the ACE fields by using keypad commands, such as FIELD and ITEM.

This appendix describes all the keypad editing commands supplied by the ACL editor. You can supplement or change these key definitions by modifying and recompiling the ACL editor section file SYS$LIBRARY:ACLEDIT.TPU (see Appendix B for more information). To get help on the ACL editor keypad commands, press PF2.

A.1 ACL Editor Keypad Commands

Figure A-1 shows the default ACL editor keypad commands for LK201 keyboards. The numeric keypad on VT100-series terminals is identical to that of the LK201 keyboard shown in Figure A-1; VT100 terminals, however, do not have the supplemental editing keypad (keys E1 through E6).

Figure A-1 Keypad for an LK201-Series Keyboard

Table A-1 describes each of the keypad commands you can use with the ACL editor. In this table, KPn refers to a keypad key labeled with the number n. For example, KP4 refers to the keypad key labeled with the number 4.

Table A-1 ACL Editor Keypad Commands

Command	Key or Key Sequence	Description
ADVANCE	KP4	Sets the current direction forward for the FIND, FNDNXT, MOVE SCREEN, OVER ACE, and WORD commands. Movement is toward the end of the ACL.
ADV FIELD	GOLD-KP7	Completes the current ACE field and moves the cursor to the next ACE field.
BACKUP	KP5	Reverses the current direction for the FIND, FNDNXT, MOVE SCREEN, OVER ACE, and WORD keys. Movement is toward the beginning of the ACL.
BOTTOM	GOLD-KP4	Positions the cursor after the last line of the last ACE. Any entries you add are placed at the end of the ACL.
DEL ACE	PF4	Deletes the entire ACE in which the cursor is positioned and stores it in the delete-ACE buffer.
DEL C	Comma	Deletes the character on which the cursor is positioned and stores it in the delete-character buffer.
DEL EOL	GOLD-KP2	Deletes text from the current cursor position to the end of the line and stores it in the delete-line buffer.
DEL W	Minus	Deletes the text from the current cursor position to the beginning of the next word and stores it in the delete-word buffer.
ENTER	Enter	Indicates that the current ACE is complete. The ACL editor terminates the insertion and verifies that the syntax of the ACE is complete. You can press the Enter key while the cursor is located at any position within the ACE. (Pressing the Return key produces the same results.)
EOL	KP2	Moves the cursor to the end of the current line.
FIELD	KP7	Completes the current ACE field and moves the cursor to the next ACE field or subfield, inserting text as needed. If the ACL editor is not in prompt mode, the ACL editor advances to the next field in the current ACE.
FIND	GOLD-PF3	Searches for an occurrence of a string. Press the FIND key and then enter the string from the main keyboard. Press the ENTER key to search for the string in the current direction, or the ADVANCE or BACKUP key to change the search direction.
FNDNXT	PF3	Searches in the current direction for the next occurrence of the string previously entered with the FIND key.
GOLD	PF1	When pressed before another keypad key, specifies the second key's alternate function (the bottom function on the keypad diagram).
HELP	PF2	Displays information about using the editing keypad.
HELP FMT	GOLD-PF2	Displays information about ACE formats.
INSERT	GOLD-KP0	Moves all text from the current line down one line, leaving a blank line where an ACE is to be inserted.
ITEM	Period	Selects the next item for the current ACE field. If the ACL editor is not in prompt mode, this key is ignored.
MOVE SCREEN	KP8	Moves the cursor one screen in the current direction (see ADVANCE or BACKUP). A screen is defined as two-thirds the number of lines in the display.
OVER ACE	KP0	Moves the cursor to the beginning of the next ACE (if the direction is set to ADVANCE) or to the beginning of the previous ACE (if the direction is set to BACKUP).
TOP	GOLD-KP5	Moves the cursor position to the first character of the first ACE in the access control list.
UND ACE	GOLD-PF4	Inserts the contents of the delete-ACE buffer in front of the ACE in which the cursor is currently positioned.
UND C	GOLD-Comma	Inserts the contents of the delete-character buffer directly in front of the cursor.
UND W	GOLD-Hyphen	Inserts the contents of the delete-word buffer directly in front of the cursor.
WORD	KP1	Moves the cursor one word forward (if the direction is set to ADVANCE) or backward (if the direction is set to BACKUP).

A.2 Additional ACL Editing Keys and Key Sequences

In addition to keypad editing, the ACL editor lets you use other keyboard keys and key sequences to perform editing functions. Table A-2 describes these additional ACL editing keys and key sequences. Keys in parentheses indicate the equivalent key for an LK201-series keyboard.

Table A-2 Additional ACL Editing Keys and Key Sequences

Key or Sequence	Action Taken When Key or Sequence Is Pressed
DOWN ARROW KEY	Moves the cursor to the character directly in line below it. If the ACE in which the cursor is positioned is new, the ACL editor processes the ACE before moving the cursor. If the entry is incomplete or formatted incorrectly, an error occurs and the cursor does not move.
LEFT ARROW KEY	Moves the cursor one character to the left. If the cursor is at the left margin, moves it to the rightmost character in the line above.
RIGHT ARROW KEY	Moves the cursor one character to the right. If the cursor is at the right margin, moves it to the leftmost character in the line below.
UP ARROW KEY	Moves the cursor to the character directly in line above it. If the ACE in which the cursor is positioned is new, the ACL editor processes the ACE before moving the cursor. If the entry is incomplete or formatted incorrectly, an error occurs and the cursor does not move.
GOLD- <-	Shifts the text in the display window 8 characters to the left.
GOLD-->	Shifts the text in the display window 8 characters to the right.
Backspace (F12)	Moves the cursor to the beginning of the current line.
Ctrl/A	Changes the current mode from insert mode to overstrike mode or from overstrike mode to insert mode. Insert mode (the default) inserts a character to the left of the current character. Overstrike mode replaces the current character.
Ctrl/D	Allows you to execute one TPU command.
Ctrl/H	Moves the cursor to the beginning of the line. (Performs the same function as the backspace key.)
Ctrl/J	Deletes the text from the cursor back to the beginning of the word. (Performs the same function as the linefeed key.)
Ctrl/R	Refreshes the screen display. Clears and redraws the screen, deleting any extraneous characters or messages that might have appeared on the screen but are not part of the ACL you are editing. (Performs the same function as Ctrl/W.)
GOLD-Ctrl/R	Returns the ACL to its original state before the ACL editor was invoked. (Performs the same function as GOLD-Ctrl/W.)
Ctrl/U	Deletes the text from the cursor to the beginning of the line.
GOLD-Ctrl/U	Inserts the contents of the deleted-line buffer into the line at the current position. The line might wrap automatically.
Ctrl/W	See Ctrl/R.
GOLD-Ctrl/W	See GOLD Ctrl/R.
Ctrl/Z	Ends the editing session and updates the ACL. (Unless otherwise specified, any recovery and journal files are deleted.)
GOLD-Ctrl/Z	Ends (quits) the editing session without saving any of the changes made to the ACL. (Unless otherwise specified, any recovery and journal files are deleted.)
DELETE KEY	Deletes the character to the left of the cursor.
Linefeed (F13)	Deletes the text from the cursor back to the beginning of the word. If the cursor is positioned at the first character of the word, deletes to the beginning of the previous word.
Tab	Moves the text located to the right of the cursor to the next tab stop.

A.3 ACL Editing Keys on the Supplemental Keypad (LK201-Series Keyboards)

You can use the supplemental keypad on an LK201-series keyboard to move sections of text from one part of an ACL to another. However, note that certain supplemental editing keys (Insert Here, Remove, and Select) require a PASTE buffer, which is not enabled by default. To enable the PASTE buffer for the current editing session, perform the following actions:

1. Press Ctrl/D.
2. At the TPU command: prompt, enter the following statement:

   TPU command: ACLEDIT$X_PASTE_BUFFER:=1

3. Press Ctrl/D again, and enter the following statement:

   TPU command: ACLEDIT$X_CHECK_MODIFY:=0

   
   Setting the value of the ACLEDIT$X_CHECK_MODIFY variable to 0 prevents the ACL editor from checking for a modifiable ACE. The two features (support for the PASTE buffer and the check for a modifiable ACE) are not compatible.

To enable the PASTE buffer for all ACL editing sessions, change the values of the variables ACLEDIT$X_PASTE_BUFFER and ACLEDIT$X_CHECK_MODIFY in the ACL editor section file and recompile the file (see Appendix B).

Table A-3 describes the supplemental keypad keys you can use with the ACL editor.

Table A-3 ACL Editing Keys on the Supplemental Keypad

Key or Key Sequence	Description
Find	Elicits the Search for: prompt as the first step in the FIND operation. Type the search string after the prompt; then, press either the Do key or the Enter key to process the search. Performs the same function as the FIND keypad command.
Insert Here	Indicates where an ACE is to be inserted or, if support for the PASTE buffer is enabled, indicates the line where the selected text in the PASTE buffer is to be inserted.
Remove	Removes the selected text to the PASTE buffer. Each time you press the Remove key, the ACL editor deletes the previous contents of the PASTE buffer.
GOLD-Remove (COPY)	Copies the selected text to the PASTE buffer. Each time you use the COPY command, the ACL editor deletes the previous contents of the PASTE buffer.
Select	Marks the beginning of a range of text to be removed or copied to the PASTE buffer. Press the Select key. Then, move the cursor to include the desired amount of text to be removed or copied. Press either Remove or GOLD-Remove (COPY) to complete the operation.
Prev Screen	Moves the cursor to the previous screen. By default, a screen is defined as two-thirds the number of lines in the display.
Next Screen	Moves the cursor one screen forward. By default, a screen is defined as two-thirds the number of lines in the display.