Initial import of the CDE 2.1.30 sources from the Open Group.
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Peter Howkins
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cde/config/util/lndir.man
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cde/config/util/lndir.man
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.\" $TOG: lndir.man /main/11 1998/02/06 11:23:56 kaleb $
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.\"
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.\" Copyright (c) 1993, 1994, 1998 The Open Group
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.\"
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.\" All Rights Reserved.
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.\"
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.\" The above copyright notice and this permission notice shall be
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.\" included in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of The Open Group shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from The Open Group.
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.\"
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.TH LNDIR 1 "Release 6.4" "X Version 11"
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.SH NAME
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lndir \- create a shadow directory of symbolic links to another directory tree
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.SH SYNOPSIS
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.B lndir
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[
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.B \-silent
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] [
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.B \-ignorelinks
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]
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.I \|fromdir\|
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[
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.I todir
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]
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.SH DESCRIPTION
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The
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.I lndir
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program makes a shadow copy
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.I todir
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of a directory tree
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.I fromdir,
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except that the shadow is not
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populated with real files but instead with symbolic links pointing at
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the real files in the
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.I fromdir
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directory tree. This is usually useful for maintaining source code for
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different machine architectures. You create a shadow directory
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containing links to the real source, which you will have usually
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mounted from a remote machine. You can build in the shadow tree, and
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the object files will be in the shadow directory, while the
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source files in the shadow directory are just symlinks to the real
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files.
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.PP
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This scheme has the advantage that if you update the source, you need not
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propagate the change to the other architectures by hand, since all
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source in all shadow directories are symlinks to the real thing: just cd
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to the shadow directory and recompile away.
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.PP
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The
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.I todir
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argument is optional and defaults to the current directory. The
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.I fromdir
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argument may be relative (e.g., ../src) and is relative to
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.I todir
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(not the current directory).
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.PP
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.\" CVS.adm is used by the Concurrent Versions System.
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Note that RCS, SCCS, CVS and CVS.adm directories are not shadowed.
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.PP
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If you add files, simply run
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.I lndir
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again. New files will be silently added. Old files will be
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checked that they have the correct link.
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.PP
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Deleting files is a more painful problem; the symlinks will
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just point into never never land.
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.PP
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If a file in \fIfromdir\fP is a symbolic link, \fIlndir\fP will make
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the same link in \fItodir\fP rather than making a link back to the
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(symbolic link) entry in \fIfromdir.\fP The \fB\-ignorelinks\fP flag
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changes this behavior.
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.SH OPTIONS
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.IP \-silent
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Normally \fIlndir\fP outputs the name of each subdirectory as it
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descends into it. The \fB\-silent\fP option suppresses these status
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messages.
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.IP \-ignorelinks
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Causes the program to not treat symbolic links in \fIfromdir\fP
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specially. The link created in \fItodir\fP will point back to the
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corresponding (symbolic link) file in \fIfromdir\fP.
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If the link is to a directory, this is almost certainly the wrong thing.
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.IP
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This option exists mostly to emulate the behavior the C version of
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\fIlndir\fP had in X11R6. Its use is not recommended.
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.SH DIAGNOSTICS
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The program displays the name of each subdirectory it enters, followed
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by a colon. The \fB\-silent\fP option suppresses these messages.
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.PP
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A warning message is displayed if the symbolic link cannot be created.
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The usual problem is that a regular file of the same name already
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exists.
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.PP
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If the link already exists but doesn't point to the correct file, the
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program prints the link name and the location where it does point.
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.SH BUGS
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The
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.I patch
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program gets upset if it cannot change the files. You should never run
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.I patch
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from a shadow directory anyway.
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.PP
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You need to use something like
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.nf
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find todir \|\-type l \|\-print \||\| xargs rm
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.fi
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to clear out all files before you can relink (if fromdir moved, for instance).
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Something like
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.nf
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find . \|\\! \|\-type d \|\-print
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.fi
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will find all files that are not directories.
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