.TH DIFF3 1 .SH NAMEdiff3 \- 3-way differential file comparison.SH SYNOPSIS.B diff3[.B \-ex3]file1 file2 file3.SH DESCRIPTION.I Diff3compares three versions of a file,and publishes disagreeing ranges of textflagged with these codes:.TP 16====all three files differ.TP 16====1.IR file1 " is different".TP 16====2.IR file2 " is different".TP 16====3.IR file3 " is different".PPThe type of change suffered in converting a given rangeof a given file to some other isindicated in one of these ways:.TP 16.IB f " : " n1 " a"Text is to be appended after line number.I n1in file.I f,where.I f= 1, 2, or 3..TP 16.IB f " : " n1 " , " n2 " c"Text is to bechanged in the range line.I n1to line.IR n2 .If .I n1=.I n2,the range may be abbreviated to.IR n1 ..PPThe original contents of the range follows immediatelyafter a.B cindication.When the contents of twofiles are identical, the contents of the lower-numberedfile is suppressed..PPUnder the.B \-eoption,.I diff3publishes a script for the editor.I edthat will incorporate into.I file1all changes between.I file2and.I file3,.IR i.e .the changes that normally would be flagged ==== and ====3.Option.B \-x(\fB\-3\fR)produces a script to incorporateonly changes flagged ==== (====3).The following command will apply the resulting script to`file1'..PP.ti 16n(cat script; echo \'1,$p\') \(bv ed \- file1.SH FILES/tmp/d3?????.br/usr/lib/diff3.SH "SEE ALSO"diff(1).SH BUGSText lines that consist of a single `.' willdefeat.B \-e..brFiles longer than 64K bytes won't work.