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 substitution,
-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
diff.
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.
The command
rcsdiff f.c
compares the latest revision on the default branch of the RCS file to the
contents of the working file
f.c.
- RCSINIT
- 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.
- RCS_MEM_LIMIT
- 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 slower
routines.
- 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 trouble.
Author: Walter F. Tichy.
Manual Page Revision: 5.10.1; Release Date: 2022-02-19.
Copyright © 2010-2022 Thien-Thi Nguyen.
Copyright © 1990, 1991, 1992, 1993 Paul Eggert.
Copyright © 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
- info rcs
should give you access to the complete manual. Additionally, the RCS homepage:
- http://www.gnu.org/software/rcs/
has news and links to the latest release, development site, etc.