DIFF3(1)                             SysV                             DIFF3(1)



NAME
     diff3 - 3-way differential file comparison

SYNOPSIS
     diff3 [ -ex3 ] file1 file2 file3

DESCRIPTION
     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
     indication.  When the contents of two files are identical, the contents
     of the lower-numbered file is suppressed.

OPTIONS
     -e        Publishes a script for the editor ed that incorporates into
               file1 all changes between file2 and file3.  That is, the
               changes that normally would be flagged ==== and ====3.

     -x(-3)    Produces a script to incorporate only changes flagged ====
               (====3).  The following command applies the resulting script to
               file1.

                (cat script; echo '1,$p') | ed - file1

FILES
     /tmp/d3*
     /usr/lib/diff3prog

BUGS
     Text lines that consist of a single . will defeat -e.
     Files longer than 64K bytes will not work.

SEE ALSO
     diff(1).