lndir
(1)
名称
lndir - create a shadow directory of symbolic links to
another directory tree
用法概要
/usr/bin/lndir [ -silent ] [ -ignorelinks ] [ -withrevinfo ]
fromdir [ todir ]
描述
User Commands LNDIR(1)
NAME
lndir - create a shadow directory of symbolic links to
another directory tree
SYNOPSIS
/usr/bin/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 containing
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 sym-
links 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 sym-
links 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 direc-
tory).
Note that BitKeeper, CVS, CVS.adm, .git, .hg, RCS, SCCS, and
.svn directories are shadowed only if the -withrevinfo flag
is specified. Files with names ending in ~ are never shad-
owed.
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
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User Commands LNDIR(1)
it descends into it. The -silent option suppresses
these status messages.
-ignorelinks
Causes the program to not treat symbolic links in
fromdir specially. The link created in todir will
point back to the corresponding (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 recom-
mended.
-withrevinfo
Causes any source control manager subdirectories (those
named BitKeeper, CVS, CVS.adm, .git, .hg, RCS, SCCS, or
.svn) 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.
SEE ALSO
ln(1).
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |file/lndir |
+-----------------------------+-----------------------------+
|Interface Stability |Uncommitted |
+-----------------------------+-----------------------------+
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