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. See Invoking diff in The GNU Diffutils Manaual.

-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

See Substitution mode option.

-q

See Misc common options.

-V

-Vn

-xsuff

See Misc common options.

-zzone

See Date option.

These options have no effect, and are included solely for consistency with other commands (see 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.)