Displays translations, the level of translation, and the logical name table for a specified logical name. The SHOW LOGICAL command performs iterative translations.

Requires read (R) access to the table in which a logical name is cataloged to display information about the logical name.

Format

SHOW LOGICAL [logical-name[:][,...]]

Parameter

logical-name[:][,...]

Specifies one or more logical names whose translations you want to display. The asterisk (*) and the percent sign (%) wildcard characters are allowed; however, if a wildcard character is used, iterative translation is not done.

The logical name is translated iteratively up to a number of times determined by the system (from 9 to 11). That is, translations are examined to see if they are also logical names.

Description

The SHOW LOGICAL command displays logical names.

The logical name LNM$DCL_LOGICAL contains the list of logical name tables and the order in which they are searched. Unless LNM$DCL_LOGICAL has been redefined, the process, job, group, and system tables are searched, in that order. (To see how LNM$DCL_LOGICAL is defined for your process, enter the command SHOW LOGICAL/TABLE=LNM$DIRECTORIES LNM$DCL_LOGICAL.)

If you specify a logical name, its translations are displayed. If you do not specify a logical name, all the logical names in the tables defined by the logical name LNM$DCL_LOGICAL are displayed.

You can specify the tables you want to search. If you do not specify a table, SHOW LOGICAL searches the tables specified by the logical name LNM$DCL_LOGICAL.

The SHOW LOGICAL command performs iterative translations. If a logical name has more than one translation, then all translations at a level are displayed before going to the next level. Use the SHOW TRANSLATION command to display only the first translation found for a specified logical name.

The SHOW LOGICAL command executes an image and causes the current image (if any) to exit. Use the SHOW TRANSLATION command (which is built into the command interpreter) when you do not want to exit the current image.

If a logical name contains control characters, the SHOW LOGICAL command replaces them with periods (.) for display.

Qualifiers

/ACCESS_MODE=mode

Displays names defined in the specified access mode and any inner access modes. You can specify one of the following keywords to indicate the access mode: USER_MODE, SUPERVISOR_MODE, EXECUTIVE_MODE, or KERNEL_MODE.

The default value for this qualifier is USER_MODE; by default any definitions in all four access modes are displayed.

/ALL (default)

Indicates that all logical names in the specified logical name tables are to be displayed. If you do not enter the /PROCESS, /JOB, /GROUP, /SYSTEM, or /TABLE qualifier, all logical names in the tables specified by the logical name LNM$DCL_LOGICAL are displayed.

/CLUSTER

Displays all the logical names in all clusterwide tables (for example, the LNM$CLUSTER and LNM$SYSCLUSTER tables).

/DESCENDANTS

/NODESCENDANTS (default)

Controls whether the system displays names from the specified logical name table and any descendant tables. A descendant table is created by the CREATE/NAME_TABLE command, with the /PARENT_TABLE qualifier specifying its parent table. If you use the /DESCENDANTS qualifier, you must also use the /TABLE qualifier.

/EXACT

Use with the /PAGE=SAVE and /SEARCH qualifiers to specify a search string that must match the search string exactly and must be enclosed with quotation marks (" ").

If you specify the /EXACT qualifier without the /SEARCH qualifier, exact search mode is enabled when you set the search string with the Find (E1) key.

/FULL

Displays more detailed information for the specified logical name. The information includes the access mode, attributes, the translation, and the logical name table.

/GROUP

Indicates that only the group logical name table is to be searched. The /GROUP qualifier is synonymous with the /TABLE=LNM$GROUP qualifier. If you specify the /GROUP qualifier and you do not also specify a logical name, all names in the group table are displayed.

/HIGHLIGHT[=keyword]

Use with the /PAGE=SAVE and /SEARCH qualifiers to specify the type of highlighting you want when a search string is found. When a string is found, the entire line is highlighted. You can use the following keywords: BOLD, BLINK, REVERSE, and UNDERLINE. BOLD is the default highlighting.

/JOB

Indicates that only the job logical name table is to be searched. The /JOB qualifier is synonymous with the /TABLE=LNM$JOB qualifier. If you specify the /JOB qualifier and you do not also specify a logical name, all names in the job logical name table are displayed.

/OUTPUT[=filespec]

/NOOUTPUT

Controls where the output of the SHOW LOGICAL command is sent. By default, the output of the SHOW LOGICAL command is sent to the current SYS$OUTPUT device (usually your terminal). To send the output to a file, use the /OUTPUT qualifier followed by a file specification.

The asterisk (*) and the percent sign (%) wildcard characters are not allowed in the file specification. If you enter a partial file specification (for example, specifying only a directory), SHOW is the default file name and .LIS is the default file type.

If you enter the /NOOUTPUT qualifier, output is suppressed.

/PAGE[=keyword]

/NOPAGE (default)

Controls the display of information on the screen.

You can use the following keywords with the /PAGE qualifier:

CLEAR_SCREEN	Clears the screen before each page is displayed.
SCROLL	Displays information one line at a time.
SAVE[= n]	Enables screen navigation of information, where n is the number of pages to store.

The /PAGE=SAVE qualifier allows you to navigate through screens of information. The /PAGE=SAVE qualifier stores up to 5 screens of up to 255 columns of information. When you use the /PAGE=SAVE qualifier, you can use the following keys to navigate through the information:

Key Sequence	Description
Up arrow key, Ctrl/B	Scroll up one line.
Down arrow key	Scroll down one line.
Left arrow key	Scroll left one column.
Right arrow key	Scroll right one column.
Find (E1)	Specify a string to find when the information is displayed.
Insert Here (E2)	Scroll right one half screen.
Remove (E3)	Scroll left one half screen.
Select (E4)	Toggle 80/132 column mode.
Prev Screen (E5)	Get the previous page of information.
Next Screen (E6), Return, Enter, Space	Get the next page of information.
F10, Ctrl/Z	Exit. (Some utilities define these differently.)
Help (F15)	Display utility help text.
Do (F16)	Toggle the display to oldest/newest page.
Ctrl/W	Refresh the display.

The /PAGE qualifier is not compatible with the /OUTPUT qualifier.

/PROCESS

Indicates that only the process logical name table is to be searched. The /PROCESS qualifier is synonymous with the /TABLE=LNM$PROCESS qualifier. If you specify the /PROCESS qualifier and you do not also specify a logical name, all names in the process table are displayed.

/SEARCH="string"

Use with the /PAGE=SAVE qualifier to specify a string that you want to find in the information being displayed. Quotation marks are required for the /SEARCH qualifier, if you include spaces in the text string.

You can also dynamically change the search string by pressing the Find key (E1) while the information is being displayed. Quotation marks are not required for a dynamic search.

/STRUCTURE

/NOSTRUCTURE (default)

Controls whether the system displays the "family tree" of all accessible logical name tables. The display includes the two logical name directory tables (process and system) and all logical name tables cataloged in these directory tables. Any descendant logical name tables are shown under their parent tables.

If you specify the /STRUCTURE qualifier, you cannot use any other qualifiers except /ACCESS_MODE, /FULL, and /OUTPUT.

/SYSTEM

Indicates that only the system logical name table is to be searched. The /SYSTEM qualifier is synonymous with the /TABLE=LNM$SYSTEM qualifier. If you specify the /SYSTEM qualifier and you do not also specify a logical name, all names in the system table are displayed.

/TABLE=(name[,...])

Specifies the tables you want to search. If you specify only one table, you can omit the parentheses. The asterisk (*) and the percent sign (%) wildcard characters are allowed. Names with wildcards are used to match table names. Names without wildcard characters are treated both as table names and table search lists (whichever is appropriate).

You can use the /TABLE qualifier to specify the following:

• A user-defined logical name table (created with the CREATE/NAME_TABLE command)
• The process, group, or system logical name tables
• The process or system directory tables

If you specify the table name by using a logical name that translates to more than one table, then each table is searched in the order specified. For example, if you specify SHOW LOGICAL/TABLE=LNM$FILE_DEV, and LNM$FILE_DEV is equated to LNM$PROCESS, LNM$JOB, LNM$GROUP, and LNM$SYSTEM, then the process, job, group, and system tables are searched, in that order.

If you do not specify the /TABLE qualifier, the default is /TABLE=LNM$DCL_LOGICAL.

/WRAP

/NOWRAP (default)

Use with the /PAGE=SAVE qualifier to limit the number of columns to the width of the screen and to wrap lines that extend beyond the width of the screen to the next line.

The /NOWRAP qualifier extends lines beyond the width of the screen and can be seen when you use the scrolling (left and right) features provided by the /PAGE=SAVE qualifier.

Examples

$ SHOW LOGICAL/PROCESS
(LNM$PROCESS_TABLE) 
  "SYS$COMMAND" = "_TTB4:" 
  "SYS$DISK" = "WORK6:" 
  "SYS$DISK" = "WORK6:" 
  "SYS$ERROR" = "_TTB4:" 
  "SYS$INPUT" = "_TTB4:" 
  "SYS$LOGIN" = "WORK6:[ODONNELL]" 
  "SYS$LOGIN_DEVICE" = "WORK6:" 
  "SYS$OUTPUT" = "_TTB4:" 
  "SYS$OUTPUT" = "DKA2:" 
  "SYS$SCRATCH" = "WORK6:[ODONNELL]"
      

The SHOW LOGICAL command in this example displays all process logical names and their translations. (Note that /TABLE=LNM$PROCESS would produce the same display as /PROCESS.)

$ SHOW LOGICAL INFILE
  "INFILE" = "WORK6:[LOGAN]PAYROLL.EXE" (LNM$PROCESS_TABLE)
      

The SHOW LOGICAL command in this example displays the translation for the logical name INFILE. The response indicates that the logical name was found in the process logical name table.

$ SHOW LOGICAL/GROUP
   .
   .
   .
      

The SHOW LOGICAL command in this example displays all group logical names and their translations. (Note that /TABLE=LNM$GROUP would produce the same display as /GROUP.)

$ SHOW LOGICAL/TABLE=SYSTEM  SYS$LIBRARY
  "SYS$LIBRARY" = "SYS$SYSROOT:[SYSLIB]" (LNM$SYSTEM_TABLE) 
                = "DOCD$:[SYSC.SYSLIB]"
      

The SHOW LOGICAL command in this example displays the translation of the logical name SYS$LIBRARY in the system table. The response indicates that SYS$LIBRARY is defined in the system table, and that the logical name has two translations.

$ SHOW LOGICAL/TABLE=LNM$GROUP/TABLE=LNM$SYSTEM SYS$DISK
  "SYS$DISK" = "ZZZ3:" (LNM$SYSTEM_TABLE)
      

The SHOW LOGICAL command in this example is qualified by both the /TABLE=LNM$GROUP and /TABLE=LNM$SYSTEM qualifiers. The response indicates that the logical name SYS$DISK was found in the system logical name table. When you enter two conflicting qualifiers, as in this example, only the last qualifier you specify is used.

$ SHOW LOGICAL/TABLE=LNM$PROCESS_DIRECTORY
      

The SHOW LOGICAL command in this example displays the logical names in the process directory table. Each name is either a table name, or a name that translates iteratively to a table.