rcsdiff - compare RCS revisions
rcsdiff [ -ksubst ] [ -q ] [ -rrev1 [ -rrev2 ] ] [ -T ] [ -V[n] ] [ -xsuffixes ] [ -zzone
] [ diff options ] file ...
rcsdiff runs diff(1) to compare two revisions of each RCS file given.
Filenames matching an RCS suffix denote RCS files; all others denote working files. Names
are paired as explained in ci(1).
The option -q suppresses diagnostic output. Zero, one, or two revisions may be specified
with -r. The option -ksubst affects keyword substitution when extracting revisions, as
described in co(1); for example, -kk -r1.1 -r1.2 ignores differences in keyword values
when comparing revisions 1.1 and 1.2. To avoid excess output from locker name substitu-
tion, -kkvl is assumed if (1) at most one revision option is given, (2) no -k option is
given, (3) -kkv is the default keyword substitution, and (4) the working file's mode would
be produced by co -l. See co(1) for details about -T, -V, -x and -z. Otherwise, all
options of diff(1) that apply to regular files are accepted, with the same meaning as for
If both rev1 and rev2 are omitted, rcsdiff compares the latest revision on the default
branch (by default the trunk) with the contents of the corresponding working file. This
is useful for determining what you changed since the last checkin.
If rev1 is given, but rev2 is omitted, rcsdiff compares revision rev1 of the RCS file with
the contents of the corresponding working file.
If both rev1 and rev2 are given, rcsdiff compares revisions rev1 and rev2 of the RCS file.
Both rev1 and rev2 may be given numerically or symbolically.
compares the latest revision on the default branch of the RCS file to the contents of the
working file f.c.
Options prepended to the argument list, separated by spaces. A backslash escapes
spaces within an option. The RCSINIT options are prepended to the argument lists
of most RCS commands. Useful RCSINIT options include -q, -V, -x, and -z.
An integer lim, measured in kilobytes, specifying the threshold under which com-
mands will try to use memory-based operations for processing the RCS file. (For
RCS files of size lim kilobytes or greater, RCS will use the slower standard
input/output routines.) Default value is 256.
TMPDIR Name of the temporary directory. If not set, the environment variables TMP and
TEMP are inspected instead and the first value found is taken; if none of them are
set, a host-dependent default is used, typically /tmp.
Exit status is 0 for no differences during any comparison, 1 for some differences, 2 for
Author: Walter F. Tichy.
Manual Page Revision: 5.9.0; Release Date: 2014-06-10.
Copyright (C) 2010-2013 Thien-Thi Nguyen.
Copyright (C) 1990, 1991, 1992, 1993 Paul Eggert.
Copyright (C) 1982, 1988, 1989 Walter F. Tichy.
ci(1), co(1), diff(1), ident(1), rcs(1), rcsmerge(1), rlog(1).
Walter F. Tichy, RCS--A System for Version Control, Software--Practice & Experience 15, 7
(July 1985), 637-654.
The full documentation for RCS is maintained as a Texinfo manual. If the info(1) and RCS
programs are properly installed at your site, the command
should give you access to the complete manual. Additionally, the RCS homepage:
has news and links to the latest release, development site, etc.
GNU RCS 5.9.0 2014-06-10 RCSDIFF(1)