User`s guide

DIFFERENCES
allocate. The meaningful range for this value is from -1 to 65527. A value
of -1 is a special case that creates the largest file possible on the device.
/ALWAYS
Used with /BINARY, /SIPP:filespec, or /OUTPUT:filespec to create an output file
regardless of whether there are any differences between the two input files. This
option is useful when running BATCH streams to prevent job-step failures due
to the absence of a DIFFERENCES output file.
The /ALWAYS option is position dependent. That is, you must use it immediately
after the output file to which you want it to apply. If you use it at the end of the
DIFFERENCES command, it applies to all output files.
/AUDITTRAIL
Used with /SLP to specify an audit trail. The /SLP option, described below,
creates a command file which, when run with the source language patch program
(SLP), can patch 1st-file so that it matches 2nd-file.
When you use SLP to modify a file, it creates an output file that has audit trails.
An audit trail is a string of characters that appears in the right margin of each
line that has been changed by the modification procedure. The audit trail keeps
track of the patches you make to the patched source file.
By default, SLP uses the following characters for the audit trail:
;**NEW**
When you use the /AUDITTRAIL option, RT–11 displays the following prompt at
the terminal.
Audit trail?
Enter a string of up to 12 ASCII characters that you want to use in place of the
default audit trail. Do not use the slash (/) in the audit trail.
/BINARY
Compares two binary files and lists the differences between them. This option is
useful for comparing memory-image and relocatable-image files (that is, machine
runnable programs and object files) and provides a quick way of telling whether
two files are identical. For example, you can use /BINARY to tell whether two
versions of a program produce identical output.
When you use /BINARY and do not specify an output file, RT–11 displays output
at the terminal according to the following general format:
bbbbbb ooo/ ffffff ssssss xxxxxx
where:
bbbbbb specifies the octal block number of the block that contains the
difference.
RT–11 Command Descriptions 81