rcsdiff - compare RCS revisions
] [ -q
] [ -rrev1
] ] [ -T
] [ -V
] ] [
] [ -zzone
] [ diff options
(1) to compare two revisions of each RCS file
Filenames matching an RCS suffix denote RCS files; all others denote working
files. Names are paired as explained in ci
The option -q
suppresses diagnostic output. Zero, one, or two revisions
may be specified with -r
. The option -ksubst
keyword substitution when extracting revisions, as described in co
for example, -kk -r1.1 -r1.2
ignores differences in
keyword values when comparing revisions 1.1
. To avoid
excess output from locker name substitution, -kkvl
is assumed if (1) at
most one revision option is given, (2) no -k
option is given, (3)
is the default keyword substitution, and (4) the working file's
mode would be produced by co -l
. See co
(1) for details
. Otherwise, all options of
(1) that apply to regular files are accepted, with the same meaning
as for diff
If both rev1
are omitted, rcsdiff
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.
is given, but rev2
is omitted, rcsdiff
of the RCS file with the contents of the corresponding
If both rev1
are given, rcsdiff
of the RCS file.
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.
- Normally, for speed, commands either memory map or copy into memory the
RCS file if its size is less than the memory-limit, currently
defaulting to ``unlimited''. Otherwise (or if the initially-tried speedy
ways fail), the commands fall back to using standard i/o routines. You can
adjust the memory limit by setting RCS_MEM_LIMIT to a numeric value
lim (measured in kilobytes). An empty value is silently ignored. As
a side effect, specifying RCS_MEM_LIMIT inhibits fall-back to
- 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,
Exit status is 0 for no differences during any comparison, 1 for some
differences, 2 for trouble.
Author: Walter F. Tichy.
Manual Page Revision: 5.9.4; Release Date: 2019-01-01.
Copyright © 2010-2015 Thien-Thi Nguyen.
Copyright © 1990, 1991, 1992, 1993 Paul Eggert.
Copyright © 1982, 1988, 1989 Walter F. Tichy.
Walter F. Tichy, RCS--A System for Version Control, Software--Practice &
, 7 (July 1985), 637-654.
The full documentation for RCS is maintained as a Texinfo manual. If the
(1) and RCS programs are properly installed at your site, the
- info rcs
should give you access to the complete manual. Additionally, the RCS homepage:
has news and links to the latest release, development site, etc.