TACL Reference Manual

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UTILS:TACL Commands and Functions

HP NonStop TACL Reference Manual—429513-018

8-46

CREATESEG Command

Use the CREATESEG command to create a TACL segment file.

file-name

is the name to be assigned to the created segment file.

Considerations

•

A segment file is a memory-mapped file that can be loaded rapidly into an

extended memory segment. When you log on, TACL creates a default segment file

to hold the variables in the root (:) directory. TACL then creates the UTILS

directory and attaches the TACLSEGF segment file to it for shared access. The

TACLSEGF file contains directories for all products (that are part of a software

RVU) that use TACL programs and are available on your system. You can add

your own library of variables to the default segment file. If you add variables to the

default segment file, you must do so every time TACL re-creates the file.

•

Along with the standard TACL segment files, you can create a segment file that

contains a library of TACL functions. If you create your own segment file, you can

instruct TACL to attach the file to a directory variable and use that directory for

reference to the file. Follow these steps:

1. Use the CREATESEG command to create and initialize a segment file.

2. Use the ATTACHSEG PRIVATE command to associate the segment file with a

directory and to gain write access to the file.

3. Use the HOME command to change the home directory to your new directory.

4. Use the LOAD command to load the contents of an existing file of TACL

routines into the segment file.

5. Use the HOME command to change your home directory back to the root (:)

directory.

6. Use the DETACHSEG command to release the segment file from the directory.

The DETACHSEG command ensures that all data is copied into the segment

file before releasing the file.

7. Use the ATTACHSEG SHARED command to attach the segment file to a

directory so that you can use the functions within the segment file.

8. Set the #USELIST built-in variable to gain access to the segment file.

•

These built-in commands are available:

#SEGMENT returns information about the default segment file.

CREATESEG file-name