LNDIR(L) LOCAL COMMANDS LNDIR(L)
NAME
lndir - create a shadow directory of symbolic links to
another directory tree.
SYNOPSIS
lndir fromdir todir
DESCRIPTION
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 main-
taining 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.
Note that RCS directories are not shadowed - they are sym-
links to the real RCS directories.
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 and recom-
pile away.
Ignore the diagnostics it generates about files already
existing when it runs - those are the directories which it
are real, and are created before the symlinking.
Note that if you add files, you must run lndir again. Delet-
ing files is a more painful problem - the symlinks will just
point into never never land.
ORIGIN
From the X11R2 distribution.
BUGS
You can write through symlinks and clobber the files some-
times. Strict RCS locking can prevent this.
patch gets upset if it cannot change the files.
You need to use something like
find todir -type l -print | xargs rm
to clear out all files before you can relink. (If fromdir
moved, for instance) Something like
find . \! -type d -print
will find all files that are not directories.
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