Virtual Hometerm Subsystem (VHS) Manual (G06.24+, H06.04+, J06.03+)

Command Descriptions
Virtual Hometerm Subsystem (VHS) Manual—429311-002
7-3
Question Mark (?) Command
Considerations
•
If you use an exclamation point (!) alone, the previous command is re-executed.
The exclamation point (!) alone is the same as ! -1.
•
If you specify a negative number and the associated command line is no longer in
the history buffer, you get an error message. (The history buffer of command lines
is 1024 bytes in length.)
•
The exclamation point (!) command does not increment the command-line number
in VHSCI prompt. The display of command line numbers in the prompt is controlled
by the SETPROMPT command.
•
The exclamation point (!) command can be issued only by an interactive user.
•
The exclamation point (!) command cannot be followed by another command on
the same line.
Examples
Question Mark (?) Command
The question mark (?) command causes a previous command line to be displayed.
number
if positive, is the line number of the command line to be displayed. If negative, the
current command-line number minus number is the line number of the command
line to be displayed.
-> INFO PROCESS $VHS
-> STATUS PROCESS $VHS
.
.
.
-> !-2 {Re-execute two commands ago }
INFO PROCESS $VHS
-> !STAT {Re-execute the most recent command}
-> STATUS PROCESS $VHS {beginning with "STAT" }
.
.
.
-> ! {Re-execute the most recent command}
STATUS PROCESS $VHS
.
.
.
? [ [ - ] number ]
[ character-string ]