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 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.

EXAMPLE

       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.

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
              An integer lim, measured in kilobytes, specifying the threshold under which commands 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.

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: 5.9.2; Release Date: 2013-11-30.
       Copyright © 2010-2013 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,  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.

GNU RCS 5.9.2                                      2013-11-30                                         RCSDIFF(1)