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UNIX in a Nutshell: System V Edition

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Previous: Reference: rcsfreeze Chapter 18
The RCS Utility
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rcsmerge

rcsmerge [

options

] 

file

Perform a three-way merge of file revisions, taking two differing versions and incorporating the changes into the working file . You must provide either one or two revisions to merge (typically with -r ). Overlaps are handled the same as with merge , by placing warnings in the resulting file. rcsmerge accepts the standard options -q , -V , and -x . rcsmerge exits with a status of 0 (no overlaps), 1 (some overlaps), or 2 (unknown problem).

Options

-k c

When comparing revisions, expand keywords using style c . (See co for values of c .)

-p[ R ]

Send merged version to standard output instead of overwriting file .

-r[ R ]

Merge revision R or, if no R is given, merge the latest revision.

Examples

Suppose you need to add updates to an old revision (1.3) of prog.c , but the current file is already at revision 1.6. To incorporate the changes:



co -l prog.c



(edit latest revision by adding revision 1.3 updates, then:)



rcsmerge -p -r1.3 -r1.6 prog.c > prog.updated.c

Undo changes between revisions 3.5 and 3.2, and overwrite the working file:



rcsmerge -r3.5 -r3.2 chap08


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