lndir - create a shadow directory of symbolic links to
another directory tree
lndir fromdir [todir]
lndir makes a shadow copy todir of a directory tree
fromdir, except that the shadow is not populated with real
files but instead with symbolic links pointing at the real
files in the fromdir directory tree. This is usually useful
for maintaining source code for different machine
architectures. You create a shadow directory containing
links to the real source which you will have usually NFS
mounted from a machine of a different architecture, and
then recompile it. The object files will be in the shadow
directory, while the source files in the shadow directory
are just symlinks to the real files.
This has the advantage that if you update the source, you
need not propagate the change to the other architectures
by hand, since all source in shadow directories are symlinks
to the real thing: just cd to the shadow directory
The todir argument is optional and defaults to the current
directory. The fromdir argument may be relative (e.g.,
../src) and is relative to todir (not the current directory).
Note that RCS, SCCS, and CVS.adm directories are not shadowed.
Note also that if you add files, you must run lndir again.
Deleting files is difficult because the symlinks will
point to places that no longer exist.
The patch routine needs to be able to change the files.
You should never run patch from a shadow directory.
Use a command like the following to clear out all files
before you can relink (if the fromdir has been moved, for
find todir -type l -print | xargs rm
The following command will find all files that are not
find . \! -type d -print
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