lndir



LNDIR(1)                                                              LNDIR(1)




NAME

       lndir  -  create a shadow directory of symbolic links to another direc-
       tory tree


SYNOPSIS

       lndir [ -silent ] [ -ignorelinks ] [ -withrevinfo ] fromdir [ todir ]


DESCRIPTION

       The lndir program 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  con-
       taining  links  to the real source, which you will have usually mounted
       from a remote machine.  You can build  in  the  shadow  tree,  and  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 scheme 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 all shadow directories are symlinks to the real  thing:  just
       cd to the shadow directory and recompile away.

       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  BitKeeper, RCS, SCCS, CVS and CVS.adm directories are shad-
       owed only if the -withrevinfo flag is specified.

       If you add files, simply run lndir again.  New files will  be  silently
       added.  Old files will be checked that they have the correct link.

       Deleting  files is a more painful problem; the symlinks will just point
       into never never land.

       If a file in fromdir is a symbolic link, lndir will make the same  link
       in todir rather than making a link back to the (symbolic link) entry in
       fromdir.  The -ignorelinks flag changes this behavior.


OPTIONS

       -silent
              Normally lndir outputs the  name  of  each  subdirectory  as  it
              descends  into  it.   The -silent option suppresses these status
              messages.

       -ignorelinks
              Causes the program to not treat symbolic links in  fromdir  spe-
              cially.  The link created in todir will point back to the corre-
              sponding (symbolic link) file in fromdir.  If the link is  to  a
              directory, this is almost certainly the wrong thing.

              This  option exists mostly to emulate the behavior the C version
              of lndir had in X11R6.  Its use is not recommended.

       -withrevinfo
              Causes any BitKeeper, RCS, SCCS, CVS and CVS.adm  subdirectories
              to be treated as any other directory, rather than ignored.


DIAGNOSTICS

       The  program displays the name of each subdirectory it enters, followed
       by a colon.  The -silent option suppresses these messages.

       A warning message is displayed if the symbolic link cannot be  created.
       The  usual  problem  is  that  a  regular file of the same name already
       exists.

       If the link already exists but doesn’t point to the correct  file,  the
       program prints the link name and the location where it does point.



                                                                      LNDIR(1)

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