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The PERUSE command allows you to read a file using read-only editor
@PERUSE (FILE) /switch(es) filespec
/switch(es) are keywords that apply to the EDIT editor. For
descriptions of these switches, see the /CREATE or
filespec is the name of the file you want to read.
Default - the last file specification and
associated switches you gave in a
CREATE, EDIT, or PERUSE command
during the current terminal session
The PERUSE command runs the EDIT system program in read-only
mode. (However, see Special Cases - Using an Editor Other than
EDIT, below.) PERUSE is actually the same as the EDIT /READONLY
command. In EDIT /READONLY mode you can use only EDIT program
switches and commands that do not modify the file.
Avoid Accidental File Modification
Use PERUSE when it is important to avoid the risk of
accidentally modifying a file.
PERUSE Line in SWITCH.INI
Add a line to your SWITCH.INI file for use with the PERUSE
Using an Editor Other than EDIT
The CREATE, EDIT and PERUSE commands in this manual assume
that these commands call on the program EDIT. If your job
uses another editing program, for example, EDT, the switches
and examples shown here will not be applicable.
The Editor used by the CREATE, EDIT and PERUSE commands is
specified by the logical name EDITOR:. You can find out the
name of this program by giving the command, INFORMATION
LOGICAL-NAMES EDITOR:. The job-wide definition (if any)
will be given first, followed by the system-wide definition;
the job-wide definition prevails if both exist. If the
definition of EDITOR: is SYS:EDIT.EXE, the CREATE, EDIT and
PERUSE commands will function as described in this manual.
Otherwise, you must consult the appropriate manual (for
example, the EDT-20 Reference Manual) for information.
Listing Available EDIT Read-Only Switches and Commands
Many of the EDIT switches and commands that are displayed in
response to a ? modify the file and do not function with
PERUSE. If you give a file-modifying switch, the switch is
ignored but no error message is displayed. If you give a
file-modifying EDIT command, you receive the message
For further information on these switches and commands see
the EDIT Reference Manual.
Effect on Memory
The PERUSE command clears any unkept forks from memory, then
loads your edit program.
CREATE for creating new files
DIRECTORY-class commands for getting lists of existing files
EDIT for modifying files
TYPE for printing files on your terminal
1. PERUSE a file
00100 !THIS IS FILEX.FOR
2. PERUSE a file, ten lines at a time, and begin at line 100.
@PERUSE /PLINES:10 FIND.BAS
00100 ! ADD ROUTINE
00200 FOR X = 0 TO 400
00300 IF X$(X) = "XXX" THEN GOTO 2050
00400 NEXT X
00500 PRINT STRING$(10,10);"FILE FULL"\SLEEP 4\GOTO 199
00600 PRINT E$ \LINPUT"ENTER THE NAME ";M$
00700 IF M$ <> "" THEN LET X$(X) = M$ ELSE GOTO 199
00800 PRINT E$ \LINPUT"ENTER THE NUMBER ";O$
00900 IF O$ <> "" THEN LET Y$(X) = O$ ELSE GOTO 199
01000 PRINT E$\INPUT"MORE NAMES TO ENTER ";D$