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MERGE(1) General Commands Manual MERGE(1)
NAME
merge - three-way file merge
SYNOPSIS
merge [ options ] file1 file2 file3
DESCRIPTION
merge incorporates all changes that lead from file2 to file3 into file1. The result ordinarily goes into file1.
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.
A conflict occurs if both file1 and file3 have changes in a common segment of lines. If a conflict is found, merge
normally outputs a warning and brackets the conflict with <<<<<<< and >>>>>>> lines. A typical conflict will look
like this:
<<<<<<< file A
lines in file A
=======
lines in file B
>>>>>>> file B
If there are conflicts, the user should edit the result and delete one of the alternatives.
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 information than -A. See diff3(1) for details. The
default is -E. With -e, merge does not warn about conflicts.
-L label
This option may be given up to three times, and specifies labels to be used in place of the corresponding file
names in conflict reports. That is, merge -L x -L y -L z a b c generates output that looks like it came from
files x, y and z instead of from files a, b and c.
-p Send results to standard output instead of overwriting file1.
-q Quiet; do not warn about conflicts.
-V Print RCS's version number.
DIAGNOSTICS
Exit status is 0 for no conflicts, 1 for some conflicts, 2 for trouble.
IDENTIFICATION
Author: Walter F. Tichy.
Manual Page Revision: 5.10.1; Release Date: 2022-02-19.
Copyright (C) 2010-2022 Thien-Thi Nguyen.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.
Copyright (C) 1982, 1988, 1989 Walter F. Tichy.
SEE ALSO
diff3(1), diff(1), rcsmerge(1), co(1).
The full documentation for RCS is maintained as a Texinfo manual. If the info(1) and RCS programs are properly in-
stalled at your site, the command
info rcs
should give you access to the complete manual. Additionally, the RCS homepage:
http://www.gnu.org/software/rcs/
has news and links to the latest release, development site, etc.
BUGS
It normally does not make sense to merge binary files as if they were text, but merge tries to do it anyway.
GNU RCS 5.10.1 2022-02-19 MERGE(1)
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