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RCSMERGE(1)							   RCSMERGE(1)

NAME
       rcsmerge - merge RCS revisions

SYNOPSIS
       rcsmerge [options] file

DESCRIPTION
       rcsmerge	 incorporates the changes between two revisions of an RCS file
       into the corresponding working file.

       Pathnames matching an RCS suffix denote RCS files;  all	others	denote
       working files.  Names are paired as explained in ci(1).

       At  least  one  revision	 must  be  specified  with  one of the options
       described below, usually -r.  At most two revisions may	be  specified.
       If  only	 one revision is specified, the latest revision on the default
       branch (normally the highest branch on the trunk) is  assumed  for  the
       second  revision.   Revisions  may be specified numerically or symboli‐
       cally.

       rcsmerge prints a warning if there are overlaps, and delimits the over‐
       lapping	regions	 as  explained in merge(1).  The command is useful for
       incorporating changes into a checked-out revision.

OPTIONS
       -A     Output conflicts using the -A style of diff3(1), if supported by
	      diff3.  This merges all changes leading from file2 to file3 into
	      file1, and generates the most verbose output.

       -E, -e These options specify conflict styles that generate less	infor‐
	      mation  than  -A.	 See diff3(1) for details.  The default is -E.
	      With -e, rcsmerge does not warn about conflicts.

       -ksubst
	      Use subst style keyword substitution.  See  co(1)	 for  details.
	      For example, -kk -r1.1 -r1.2 ignores differences in keyword val‐
	      ues when merging the changes from 1.1 to 1.2.  It normally  does
	      not  make	 sense	to merge binary files as if they were text, so
	      rcsmerge refuses to merge files if -kb expansion is used.

       -p[rev]
	      Send the result to standard output instead  of  overwriting  the
	      working file.

       -q[rev]
	      Run quietly; do not print diagnostics.

       -r[rev]
	      Merge  with  respect  to revision rev.  Here an empty rev stands
	      for the latest revision on  the  default	branch,	 normally  the
	      head.

       -T     This  option has no effect; it is present for compatibility with
	      other RCS commands.

       -V     Print RCS's version number.

       -Vn    Emulate RCS version n.  See co(1) for details.

       -xsuffixes
	      Use suffixes to characterize RCS files.  See ci(1) for details.

       -zzone Use zone as the time zone for keyword substitution.   See	 co(1)
	      for details.

EXAMPLES
       Suppose you have released revision 2.8 of f.c.  Assume furthermore that
       after you complete an unreleased revision 3.4, you receive  updates  to
       release	2.8 from someone else.	To combine the updates to 2.8 and your
       changes between 2.8 and 3.4, put the updates to 2.8 into file  f.c  and
       execute

	   rcsmerge  -p	 -r2.8	-r3.4  f.c  >f.merged.c

       Then  examine  f.merged.c.   Alternatively,  if	you  want  to save the
       updates to 2.8 in the RCS file, check them in as revision  2.8.1.1  and
       execute co -j:

	   ci  -r2.8.1.1  f.c
	   co  -r3.4  -j2.8:2.8.1.1  f.c

       As  another  example,  the following command undoes the changes between
       revision 2.4 and 2.8 in your currently checked out revision in f.c.

	   rcsmerge  -r2.8  -r2.4  f.c

       Note the order of the arguments, and that f.c will be overwritten.

ENVIRONMENT
       RCSINIT
	      options prepended to the argument	 list,	separated  by  spaces.
	      See ci(1) for details.

DIAGNOSTICS
       Exit status is 0 for no overlaps, 1 for some overlaps, 2 for trouble.

IDENTIFICATION
       Author: Walter F. Tichy.
       Manual Page Revision: 1.5.56.1.6.1; Release Date: 2010/12/21.
       Copyright © 1982, 1988, 1989 Walter F. Tichy.
       Copyright © 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.

SEE ALSO
       ci(1),  co(1),  ident(1),  merge(1),  rcs(1),  rcsdiff(1), rcsintro(1),
       rlog(1), rcsfile(5)
       Walter F. Tichy, RCS--A System for Version Control,  Software--Practice
       & Experience 15, 7 (July 1985), 637-654.

GNU				  2010/12/21			   RCSMERGE(1)
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