revpath - generate a relative path that can be used to undo a change-directory

       It isn't possible to reverse arbitrary relative paths.  If any path element between the two end points of
       path is a symbolic link, the results will probably be incorrect.

X Version 11                                      imake 1.0.10                                        REVPATH(1)

       The  revpath  program  prints  out a relative path that is the ``reverse'' or ``inverse'' of path.  Start
       with two directories top and bottom, with the latter below the former, and path is the location of bottom
       relative to top.  The output of revpath is the location of top relative to bottom.   The  resulting  path
       contains  a  trailing  `/'  character  when the result is non-trivial.  If path is equivalent to `.', the
       resulting output is empty.  If path is invalid in some  way  (e.g.,  doesn't  represent  the  path  to  a
       subdirectory) the output is also empty and no error messages are ever generated.

       There are no diagnostics.  Error conditions are silently ignored, and the exit status is always 0.

       revpath - generate a relative path that can be used to undo a change-directory

revpathpath