rcsdiff (1)

NAME

rcsdiff - compare RCS revisions

SYNOPSIS

rcsdiff [ -ksubst ] [ -q ] [ -rrev1 [ -rrev2 ] ] [ -T ] [ -V[n] ] [ -xsuffixes ] [ -zzone ] [ diff options ] file ...

DESCRIPTION

rcsdiff runs diff(1) to compare two revisions of each file given.

Filenames matching an

suffix denote 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

file with the contents of the corresponding working file.

If both rev1 and rev2 are given, rcsdiff compares revisions rev1 and rev2 of the

file.

Both rev1 and rev2 may be given numerically or symbolically.

EXAMPLE

The command

rcsdiff f.c

compares the latest revision on the default branch of the

file to the contents of the working file f.c.

ENVIRONMENT

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.

DIAGNOSTICS

Exit status is 0 for no differences during any comparison, 1 for some differences, 2 for trouble.

IDENTIFICATION

Author: Walter F. Tichy.
Manual Page Revision: 5.9.4; Release Date: 2015-06-21.
Copyright © 2010-2015 Thien-Thi Nguyen.
Copyright © 1990, 1991, 1992, 1993 Paul Eggert.
Copyright © 1982, 1988, 1989 Walter F. Tichy.

SEE ALSO

ci(1), co(1), diff(1), ident(1), rcs(1), rcsmerge(1), rlog(1).

Walter F. Tichy,

--A System for Version Control, Software--Practice & Experience 15, 7 (July 1985), 637-654.

The full documentation for

is maintained as a Texinfo manual. If the info(1) and programs are properly installed at your site, the command

info rcs

should give you access to the complete manual. Additionally, the

homepage:

www.gnu.org/software/rcs

has news and links to the latest release, development site, etc.