Termin Window
![[IMAGE]](./images/02109950.gif)
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DESCRIPTION
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The Termin window is used to type terminal
input requested by a program, CLIST, or EXEC. By default, the debugger intercepts
program input requests, opens the Termin window, and prompts you for input.
As shown in Termin Window,
there are three areas in the Termin window: a status and prompt line, an optional
scale or ruler line, and the input field.
Status and prompt line The Termin
window is controlled by the following fields located in the status and prompt
line:
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Read..., Exec..., or Cont...
prompt
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flashes to indicate that input is required.
This prompt displays Read... or Exec... when the window is first opened. Read...
displays to indicate that the input is requested by a program, and Exec... displays to indicate that input is requested by a CLIST
or an EXEC. If you continue input, as described later in Entering terminal
input, this prompt changes to Cont..., indicating
that additional input is required.
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Intercept:
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controls the input intercept. By default,
Intercept is set to
Y (yes), which causes the
Termin window to automatically intercept terminal input requests. Typing N (no) in this field turns off the input intercept.
Returning to
line mode also turns off the intercept.
Returning to full-screen mode automatically restores the previous status of
the intercept.
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Log:
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determines whether input that is typed into
the Termin window is copied to the Log window. By default, Log is set to
N (no). Typing Y (yes) in
this field sends a copy of the input to the Log.
Note: The Config window can be used to select a unique
color for terminal input that is copied to the Log window.
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EOF:
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is normally set to
N
(no) but can be temporarily set to Y (yes)
to signal an end-of-file condition when the Termin window is prompting you
for input. If you intend to continue a line, specify Y
only on the last display.
The EOF: prompt is also used
to return a condition code to a CLIST or EXEC. See Using the Termin
window with the dbinput command later in this section.
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Scale:
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displays a scale, or column ruler, on the
second line of the Termin window. By default, this field is set to
Y (yes), displaying the scale. If this field is set to N (no), the
scale is not displayed and the window shrinks
by one line. Setting it back to Y causes the
window to grow by one line and the scale to be redisplayed.
Typing Terminal input
Terminal
input is typed into the input field following the :
prompt, which is located directly under the scale prompt. If there is not
sufficient space in the input field, you can resize the Termin window horizontally
or you can continue input using the backslash (\) as the continuation character.
If input is continued in this manner, the flashing Read...
or Exec... prompt is replaced by a flashing Cont... prompt. Another \ character can be used to repeat the
process. You can type up to 255 characters. If more than 255 characters are
entered, the debugger truncates to 255.
terminal input prompt If the prompt
is terminated with a \ n, then the \ n appears at the end of the prompt area as two separate
characters, a \ and an n.
Input prompts greater than 64 characters long are truncated. If a \ and an n had been the 64th
and 65th characters, then the prompt would have been truncated after 63 characters.
Restrictions while input is pending
You can move between windows and examine variables while either the flashing Read... or Cont... prompt is displayed
in the Termin window; however, you cannot issue any command that continues
execution. Satisfying the input request by typing input at the Termin window
is the only way to return control to the program and automatically continue
execution. Also, you cannot close the Termin window while the Read..., Exec..., or Cont... prompt is
displayed.
Turning off the Intercept prompt
If it is not possible to open the Termin window, the debugger turns off
the intercept. This can occur when you have too many windows open at the same
time. You can change the default setting of the Intercept:,
or any other prompt, by making the selections you want in the Termin window
and saving the changes to your configuration file. Changes are saved with
the config save command. See Setting Up a Configuration File for more information.
Resizing
the Termin window You
can resize the Termin window horizontally to enable additional information
to be input on a line as described earlier. However, you cannot resize the
window vertically.
Using the Termin window with the dbinput command In full-screen mode, the Termin window is used to type input
required by a dbinput command. In this case
the : prompt is changed to display the prompt
string that is specified by the STRING argument of the dbinput command. For example, Display 11.17 Termin Window Prompt String shows
the Termin window as it would be
displayed if the intercept were caused by the following dbinput command:
dbinput EXEC_VAR "Is a mapping of struct worddata desired? (y for yes):"
In this case, input entered in the Termin window is
assigned the CLIST or EXEC variable named EXEC_VAR.
Display 11.17 Termin Window Prompt String
![[IMAGE]](./images/02109951.gif)
When you are using
the Termin window in conjunction
with the dbinput command, the EOF: prompt is used to return a condition code to the CLIST
or EXEC that contains the dbinput command.
Setting the EOF: prompt to Y
causes a condition code of -13 to be returned to an EXEC or +13 to a
CLIST. It also causes the stack to be flushed if the return code is being
passed to a CLIST.
When too many windows are opened, the debugger might
not be able to open the Termin window. If the Termin window cannot be opened,
a prompt is displayed, and you can still type the input that is required by
the dbinput command called from a CLIST or
EXEC. Once input is typed, you can continue your debugging session.
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ADDITIONAL DISCUSSION
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Looking at Terminal I/O
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SEE ALSO
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The
dbinput
command for the Termout Window
Copyright © 2001
by SAS Institute Inc., Cary, NC, USA. All rights reserved.
