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HP-UX 11i Version 3: February 2007

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rcsmerge — merge RCS revisions


rcsmerge -rrev1 [-r rev2] [-p] file


rcsmerge incorporates the changes between rev1 and rev2 of an RCS file into the corresponding working file. If -p is given, the result is printed on the standard output; otherwise the result overwrites the working file.

A file name ending in ,v is an RCS file name; otherwise it is a working file name. rcsmerge derives the working file name from the RCS file name and vice versa, as explained in rcsintro(5). A pair consisting of both an RCS and a working file name can also be specified.

rev1 cannot be omitted. If rev2 is omitted, the latest revision on the trunk is assumed. Both rev1 and rev2 can be given numerically or symbolically.

rcsmerge prints a warning if there are overlaps, and delimits the overlapping regions as explained for the -j option of co(1). The command is useful for incorporating changes into a checked-out revision.


Suppose you have released revision 2.8 of f.c. Assume furthermore that you just completed revision 3.4 when 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 and execute co -j:

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


rcsmerge does not work for files that contain lines with a single period (.).


rcsmerge was developed by Walter F. Tichy.

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