DIFF3(1) General Commands Manual DIFF3(1)
diff3 - 3-way differential file comparison
diff3 [ -ex3 ] file1 file2 file3
Diff3 compares three versions of a file, and publishes disagreeing
ranges of text flagged with these codes:
==== all three files differ
====1 file1 is different
====2 file2 is different
====3 file3 is different
The type of change suffered in converting a given range of a given file
to some other is indicated in one of these ways:
f : n1 a Text is to be appended after line number n1 in file f,
where f = 1, 2, or 3.
f : n1 , n2 c Text is to be changed in the range line n1 to line n2.
If n1 = n2, the range may be abbreviated to n1.
The original contents of the range follows immediately after a c indi-
cation. When the contents of two files are identical, the contents of
the lower-numbered file is suppressed.
Under the -e option, diff3 publishes a script for the editor ed that
will incorporate into file1 all changes between file2 and file3, i.e.
the changes that normally would be flagged ==== and ====3. Option -x
(-3) produces a script to incorporate only changes flagged ====
(====3). The following command will apply the resulting script to
(cat script; echo '1,$p') | ed - file1
Text lines that consist of a single `.' will defeat -e.
Files longer than 64K bytes won't work.