100 lines
3.2 KiB
HTML
100 lines
3.2 KiB
HTML
<!--
|
|
Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2013
|
|
The President and Fellows of Harvard College.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
3. Neither the name of the University nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
|
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
SUCH DAMAGE.
|
|
-->
|
|
<html>
|
|
<head>
|
|
<title>ln</title>
|
|
<link rel="stylesheet" type="text/css" media="all" href="../man.css">
|
|
</head>
|
|
<body bgcolor=#ffffff>
|
|
<h2 align=center>ln</h2>
|
|
<h4 align=center>OS/161 Reference Manual</h4>
|
|
|
|
<h3>Name</h3>
|
|
<p>
|
|
ln - link files
|
|
</p>
|
|
|
|
<h3>Synopsis</h3>
|
|
<p>
|
|
<tt>/bin/ln</tt> <em>oldfile</em> <em>newfile</em>
|
|
<br>
|
|
<tt>/bin/ln -s</tt> <em>oldfile</em> <em>newfile</em>
|
|
</p>
|
|
|
|
<h3>Description</h3>
|
|
<p>
|
|
ln creates links to files. The first usage creates a hard link, that
|
|
is, an additional name for the <em>same</em> file. The second
|
|
usage, with the -s option, creates a symbolic link, a special
|
|
filesystem entry that redirects accesses back to the first original
|
|
file.
|
|
</p>
|
|
|
|
<p>
|
|
The symlink created is of the form <em>newfile</em> -> <em>oldfile</em>.
|
|
</p>
|
|
|
|
<p>
|
|
Note that <tt>ln</tt> does <em>not</em> support the Unix idiom
|
|
<tt>ln file1 file2 ... destination-dir</tt> to link a number of files
|
|
at once. In particular, <tt>ln foo bar/</tt> will fail, probably with
|
|
"Is a directory".
|
|
</p>
|
|
|
|
<h3>Requirements</h3>
|
|
<p>
|
|
<tt>ln</tt> uses the following syscalls:
|
|
<ul>
|
|
<li><A HREF=../syscall/link.html>link</A>
|
|
<li><A HREF=../syscall/symlink.html>symlink</A>
|
|
<li><A HREF=../syscall/write.html>write</A>
|
|
<li><A HREF=../syscall/_exit.html>_exit</A>
|
|
</ul>
|
|
</p>
|
|
|
|
<p>
|
|
<tt>ln</tt> without the -s option should work once (or if) you
|
|
implement hard links. <tt>ln</tt> with the -s option should work once
|
|
(or if) you implement symbolic links. Check your assignments for when
|
|
(or if) you need to implement these features.
|
|
</p>
|
|
|
|
<p>
|
|
<tt>ln</tt> is able to create symlinks even if hard links are not
|
|
implemented, and vice versa.
|
|
</p>
|
|
|
|
<h3>See Also</h3>
|
|
<p>
|
|
<A HREF=cp.html>cp</A>, <A HREF=mv.html>mv<A>
|
|
</p>
|
|
|
|
</body>
|
|
</html>
|