SeeView Manual

Introduction
HP NonStop SeeView Manual—526355-004
1-7
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another task. For example, when you start a PERUSE process from a TACL process,
these tasks are called peer tasks.
When the SeeView program is first started, it allocates memory to be used for all the
caches it will create when tasks are started. A task is assigned a portion of this total
cache pool the first time it is started, and the amount allocated to a task cannot be
changed once assigned. At some point, the cache for a task will fill up. When the
cache fills up, the oldest lines in the cache for the task are lost, and new lines reuse
their space. In this way, a cache always contains the most recent output for that task.
In many ways, the SeeView program acts as a cache manager. When the SeeView
program receives output from a task, that text is stored in a cache. The program keeps
track of which tasks are associated with which cache and stores output in the
appropriate location. A window displays the output stored in a cache. The sill of a
window provides a place to enter new commands for the process (task) associated
with the cache displayed in the current window.
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You can display any text that is in a task’s cache in a window (or several windows).
Once a window is created and assigned to a task, you can scroll through the text in the
window to display the area of interest by pressing function keys. You can scroll
vertically or horizontally within a window. Scrolling horizontally displays lines of text that
are too wide for the current window size.
Scripts
SeeView provides a command language for customizing environments and defining
menu actions in command files called scripts. Scripts are EDIT files containing
statements in the SeeView script language that are executed in response to some
action on your part (such as making a menu selection).
Shell
The standard SeeView environment is contained in an automatically invoked script
called the shell. If you specify an IN file when you start the SeeView program, the
program invokes that file as the shell. If you do not specify an IN file, the program looks
on the current subvolume for a file called SeeShell and invokes that file. If this file is
not present, the program looks in the same subvolume as the SeeView object file for a
SeeShell file.
External Scripts
The standard shell also allows you to access external scripts that are not part of the
environment set up by the shell. You can access them through a shell menu or by
explicit commands.