rcs: rcsdiff
2.8 Invoking rcsdiff
====================
rcs diff [options] file ...
(or “rcsdiff” instead of “rcs diff”)
The rcsdiff command runs diff to compare two revisions in an RCS file.
⇒(diff)Invoking diff.
-rREV
(zero, one, or two times) Name a revision. If given two revisions
(‘-rREV1 -rREV2’), compare those revisions. If given only one
revision (‘-rREV’), compare the working file with it. If given no
revisions, compare the working file with the latest revision on the
default branch.
-kSUBST
⇒Substitution mode option.
-q
⇒Misc common options.
-V
-VN
-xSUFF
⇒Misc common options.
-zZONE
⇒Date option.
These options have no effect, and are included solely for consistency
with other commands (⇒Environment): ‘-T’.
Additionally, the following options (and their argument, if any) are
passed to the underlying diff command:
-0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -B, -C, -D, -F, -H, -I,
-L, -U, -W, -a, -b, -c, -d, -e, -f, -h, -i, -n, -p, -t, -u, -w, -y,
long options (that start with "--")
(Not all of these options are meaningful.)