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- NAME
- merge - three-way file merge
-
- SYNOPSIS
- merge [ -L label1 [ -L label3 ] ] [ -p ] [ -q ] file1 file2
- file3
-
- DESCRIPTION
- merge incorporates all changes that lead from file2 to file3
- into file1. The result goes to standard output if -p is
- present, into file1 otherwise. merge is useful for
- combining separate changes to an original. Suppose file2 is
- the original, and both file1 and file3 are modifications of
- file2. Then merge combines both changes.
-
- An overlap occurs if both file1 and file3 have changes in a
- common segment of lines. On a few older hosts where diff3
- does not support the -E option, merge does not detect
- overlaps, and merely supplies the changed lines from file3.
- On most hosts, if overlaps occur, merge outputs a message
- (unless the -q option is given), and includes both
- alternatives in the result. The alternatives are delimited
- as follows:
-
- <<<<<<< file1
- lines in file1
- =======
- lines in file3
- >>>>>>> file3
-
- If there are overlaps, the user should edit the result and
- delete one of the alternatives. If the -L label1 and
- -L label3 options are given, the labels are output in place
- of the names file1 and file3 in overlap reports.
-
- DIAGNOSTICS
- Exit status is 0 for no overlaps, 1 for some overlaps, 2 for
- trouble.
-
- IDENTIFICATION
- Author: Walter F. Tichy.
- Revision Number: 5.4; Release Date: 1992/02/17.
- Copyright 1982, 1988, 1989 by Walter F. Tichy.
- Copyright 1990, 1991 by Paul Eggert.
-
- SEE ALSO
- diff3(1), diff(1), rcsmerge(1), co(1).
-