REVPATH(1) UNIX Programmer's Manual REVPATH(1)
revpath - generate a relative path that can be used to undo
a change-directory
revpath path
The revpath program prints out a relative path that is the
``reverse'' or ``inverse'' of path. Start with two direc-
tories 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 gen-
erated.
There are no diagnostics. Error conditions are silently
ignored, and the exit status is always 0.
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.
XFree86 Version 4.5.0 1
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