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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<table border="0" cellspacing="2" cellpadding="2">
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<td align="center"><a href=
"http://www.keplerproject.org/luafilesystem"><img border="0" alt=
"LuaFileSystem logo" src="luafilesystem.png"></a> </td>
</tr>
<tr>
<td align="center"><big><b>LuaFileSystem Reference Manual</b></big>
</td>
</tr>
<tr>
<td align="center" valign="top">File system library for the <a
href="http://www.lua.org">Lua</a> programming language</td>
</tr>
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</center>
<center><small><a href="index.html">home</a> · <a href=
"#introduction">introduction</a> · <a href=
"#reference">reference</a> · <a href=
"#example">example</a></small></center>
<hr>
<a name="introduction"></a>
<h2>Introduction</h2>
<p>LuaFileSystem is a <a href="http://www.lua.org">Lua</a> library
developed to complement the set of functions related to file
systems offered by the standard Lua distribution.</p>
<p>LuaFileSystem is free software and uses the same <a href=
"license.html">license</a> as Lua 5.0.</p>
<a name="reference"></a>
<h2>Reference</h2>
<p>LuaFileSystem offers the following functions:</p>
<ul>
<li style="list-style: none"><a name="attributes"></a></li>
<li><b><tt>lfs.attributes (filepath)</tt></b><br>
Obtains the file attributes. The attributes are:
<div style="margin-left: 2em"><i>dev</i>, device inode resides
on;<br>
<i>ino</i>, inode's number;<br>
<i>mode</i>, inode protection mode (<small>values could be
<tt>file</tt>, <tt>directory</tt>, <tt>link</tt>, <tt>socket</tt>,
<tt>named pipe</tt>, <tt>char device</tt>, <tt>block device</tt> or
<tt>other</tt></small>);<br>
<i>nlink</i>, number of hard links to the file;<br>
<i>uid</i>, user-id of owner;<br>
<i>gid</i>, group-id of owner;<br>
<i>rdev</i>, device type, for special file inode;<br>
<i>access</i>, time of last access;<br>
<i>modification</i>, time of last data modification;<br>
<i>change</i>, time of last file status change;<br>
<i>size</i>, file size, in bytes;<br>
<i>blocks</i>, block allocated for file; (Unix only)<br>
<i>blksize</i>, optimal file system I/O blocksize; (Unix only)<br>
</div>
Returns a table with file attributes described above. <a name=
"chdir"></a></li>
<li><b><tt>lfs.chdir (path)</tt></b><br>
Changes the current working directory to the given
<tt>path</tt>.<br>
Returns <tt>true</tt> in case of success or <tt>nil</tt> plus an
error string. <a name="getcwd"></a></li>
<li><b><tt>lfs.currentdir ()</tt></b><br>
Returns a string with the current working directory or
<code>nil</code> plus an error string. <a name="dir"></a></li>
<li><b><tt>lfs.dir (path)</tt></b><br>
Lua iterator over the entries of a given directory. Raises an
error if <tt>path</tt> is not a directory. <a name="lock"></a></li>
<li><b><tt>lfs.lock (filehandle, mode[, start[,
length]])</tt></b><br>
Locks a file or a part of it. This function works on <em>open
files</em>; the file handle should be specified as the first
argument. The string <code>mode</code> could be either
<code>r</code> (for a read/shared lock) or <code>w</code> (for a
write/exclusive lock). The optional arguments <code>start</code>
and <code>length</code> can be used to specify a starting point and
its length; both should be numbers.<br>
Returns a boolean indicating if the operation was successful; in
case of error, it returns <code>false</code> plus an error string.
<a name="mkdir"></a></li>
<li><b><tt>lfs.mkdir (dirname)</tt></b><br>
Creates a new directory. The argument is the name of the new
directory.<br>
Returns a boolean indicating whether the operation succeeds or not
(in this case, an error string is returned too). <a name=
"unlock"></a></li>
<li><b><tt>lfs.unlock (filehandle[, start[, length]])</tt></b><br>
Unlocks a file or a part of it. This function works on <em>open
files</em>; the file handle should be specified as the first
argument. The optional arguments <code>start</code> and
<code>length</code> can be used to specify a starting point and its
length; both should be numbers.<br>
Returns a boolean indicating if the operation was successful; in
case of error, it returns <code>false</code> plus a string
describing the error.</li>
</ul>
<a name="example"></a>
<h2>Example</h2>
<pre>
require"lfs"
function attrdir (path)
for file in lfs.dir(path) do
if file ~= "." and file ~= ".." then
local f = path..'/'..file
print ("\t "..f)
local attr = lfs.attributes (f)
assert (type(attr) == "table")
if attr.mode == "directory" then
attrdir (f)
else
for name, value in pairs(attr) do
print (name, value)
end
end
end
end
end
attrdir (".")
</pre>
<a name="contents"></a>
<h2>Contents</h2>
<ul>
<li><a href="#introduction">Introduction</a></li>
<li><a href="#reference">Reference</a>
<ul>
<li><a href="#chdir">chdir</a></li>
<li><a href="#currentdir">currentdir</a></li>
<li><a href="#dir">dir</a></li>
<li><a href="#lock">lock</a></li>
<li><a href="#mkdir">mkdir</a></li>
<li><a href="#unlock">unlock</a></li>
</ul>
</li>
<li><a href="#examples">Examples</a></li>
</ul>
<br>
<br>
<center><small><a href="index.html">home</a> · <a href=
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