Owner's manual

Working With SAFECOM
Safeguard User’s Guide — 422089-020
7 - 8
Displaying and Editing Previous Commands
Displaying a Specific Command
The ? command allows you to display a specific command entered earlier in the
current session. You can specify the command to be displayed by entering a line
number, a relative line number, or a text string, as the following examples show.
For example, this ? command requests the display of command line number 18:
=? 18
=ALTER DISKFILE PROGFILE, PROGID ON
=
You can also specify a minus (-) line number to search for a command line number
relative to the current line number. For example, if your current command line number
is 23, the following ? command displays the command at line 20. For clarity, the
following examples assume that you used the DISPLAY PROMPT command to specify
that your normal SAFECOM prompt is to include a line number. The command line
number does not change until you execute a command other than ?, !, or FC.
23=? -3
23=INFO DISKFILE PROGFILE, DETAIL
23=
There are two ways to request a search for a command that contains a specific text
string. If you do not enclose the string in quotes, the ? command searches for the most
recent command that starts with the designated string. The following ? command
illustrates this type of search:
23=? add
23=ADD DISKFILE QUARTER1, ACC 2,18 O
23=
If you enclose the text string in quotes, the ? command searches the most recent
command that contains that string anywhere within the command. The following ?
command performs this type of search:
23=? "quarter2"
23=ALTER DISKFILE QUARTER2, LIKE QUARTER1
23=
Executing a Specific Command
The ! command functions like the ? command except that the specified command is
executed when it is displayed. For example, the following ! command displays and
executes the most recent command that contains the text string “quarter2”:
23=! "quarter2"
23=ALTER DISKFILE QUARTER2, LIKE QUARTER1
24=
SAFECOM increments the command line number because the ALTER DISKFILE
command was executed.