IDIFF(1)                                                 IDIFF(1)

     NAME
          idiff - interactive diff

     SYNOPSIS
          idiff [ -bw ] file1 file2

     DESCRIPTION
          Idiff interactively merges file1 and file2 onto standard
          output.  Wherever file1 and file2 differ, idiff displays the
          differences in the style of ``diff -n'' on standard error
          and prompts the user to select a chunk.  Valid responses
          are:

          <    Use the chunk from file1.

          >    Use the chunk from file2.

          =    Use the diff output itself.

          q<, q>, q=
               Use the given response for all future questions.

          !cmd Execute cmd and prompt again.

          Idiff invokes diff(1) to compare the files.  The -b and -w
          flags, if passed, are passed to diff.

     FILES
          /tmp/idiff.*

     SOURCE
          /sys/src/cmd/idiff.c

     SEE ALSO
          diff(1)
          Kernighan and Pike, The Unix Programming Environment,
          Prentice-Hall, 1984.