rcsdiff(1)

1RCSDIFF(1)                  General Commands Manual                 RCSDIFF(1)
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NAME

6       rcsdiff - compare RCS revisions
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SYNOPSIS

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

13       rcsdiff runs diff(1) to compare two revisions of each RCS file given.
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15       Filenames matching an RCS suffix denote RCS files;  all  others  denote
16       working files.  Names are paired as explained in ci(1).
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18       The  option  -q  suppresses diagnostic output.  Zero, one, or two revi‐
19       sions may be specified with -r.  The  option  -ksubst  affects  keyword
20       substitution  when  extracting  revisions,  as  described in co(1); for
21       example, -kk -r1.1 -r1.2 ignores differences  in  keyword  values  when
22       comparing  revisions  1.1  and 1.2.  To avoid excess output from locker
23       name substitution, -kkvl is assumed if (1) at most one revision  option
24       is  given,  (2)  no -k option is given, (3) -kkv is the default keyword
25       substitution, and (4) the working file's  mode  would  be  produced  by
26       co -l.   See co(1) for details about -T, -V, -x and -z.  Otherwise, all
27       options of diff(1) that apply to regular files are accepted,  with  the
28       same meaning as for diff.
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30       If both rev1 and rev2 are omitted, rcsdiff compares the latest revision
31       on the default branch (by default the trunk) with the contents  of  the
32       corresponding  working  file.   This is useful for determining what you
33       changed since the last checkin.
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35       If rev1 is given, but rev2 is omitted, rcsdiff compares  revision  rev1
36       of the RCS file with the contents of the corresponding working file.
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38       If  both  rev1  and rev2 are given, rcsdiff compares revisions rev1 and
39       rev2 of the RCS file.
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41       Both rev1 and rev2 may be given numerically or symbolically.
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EXAMPLE

44       The command
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46               rcsdiff  f.c
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48       compares the latest revision on the default branch of the RCS  file  to
49       the contents of the working file f.c.
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ENVIRONMENT

52       RCSINIT
53              Options  prepended to the argument list, separated by spaces.  A
54              backslash escapes spaces within an option.  The RCSINIT  options
55              are  prepended to the argument lists of most RCS commands.  Use‐
56              ful RCSINIT options include -q, -V, -x, and -z.
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58       RCS_MEM_LIMIT
59              An integer lim, measured in kilobytes, specifying the  threshold
60              under which commands will try to use memory-based operations for
61              processing the RCS file.  (For RCS files of size  lim  kilobytes
62              or  greater,  RCS will use the slower standard input/output rou‐
63              tines.)  Default value is 256.
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65       TMPDIR Name of the temporary directory.  If not  set,  the  environment
66              variables TMP and TEMP are inspected instead and the first value
67              found is taken; if  none  of  them  are  set,  a  host-dependent
68              default is used, typically /tmp.
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DIAGNOSTICS

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

75       Author: Walter F. Tichy.
76       Manual Page Revision: 5.9.0; Release Date: 2014-06-10.
77       Copyright © 2010-2013 Thien-Thi Nguyen.
78       Copyright © 1990, 1991, 1992, 1993 Paul Eggert.
79       Copyright © 1982, 1988, 1989 Walter F. Tichy.
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