lndir - create a shadow directory of symbolic links to another directory
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
This has the advantage that if you update the source, you need not pro-
pagate 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 and recompile.
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
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 instance):
find todir -type l -print | xargs rm
The following command will find all files that are not directories:
find . \! -type d -print