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Code Editor : DisplayFiles.html

<!DOCTYPE html>
<html>
<head>
<title>ProFTPD: Display Files</title>
</head>

<hr>
<center><h2>ProFTPD: <code>Display</code> Files</h2></center>
<hr>

ProFTPD supports a number of configuration directives that specify a file
whose contents should be displayed to connected clients at various times:
<ul>
 <li>
 <dt><code>DisplayConnect</code>
 <dd>Displayed to clients as soon as they connect</dd>
 </li>

<li>
 <dt><code>DisplayLogin</code>
 <dd>Displayed to clients once they have logged in using the
 <code>USER</code> and <code>PASS</code> commands</dd>
 </li>

<li>
 <dt><code>DisplayChdir</code>
 <dd>Displayed to a client whenever it changes into a directory</dd>
 </li>

<li>
 <dt><code>DisplayFileTransfer</code>
 <dd>Displayed to the client whenever a file is successfully transfer,
 either uploaded or downloaded</dd>
 </li>

<li>
 <dt><code>DisplayQuit</code>
 <dd>Displayed to a client when the session ends via the <code>QUIT</code>
 command</dd>
 </li>
</ul>

Note the subtle difference between <code>DisplayConnect</code> and
<code>DisplayLogin</code>. A <code>DisplayConnect</code> file will be
displayed to all clients; this makes it suitable for server banners,
messages of the day, etc. A <code>DisplayLogin</code> file will only
be displayed once the client has logged in.

The configured file paths can be either relative or absolute (except in the
case of <code>DisplayConnect</code>, which always requires absolute paths).
In the case of a relative path, the file is assumed to be in the starting
directory a user, i.e. the <code>&lt;Anonymous&gt;</code> directory
for anonymous logins, and the user's home directory for non-anonymous logins.
Note: If <code>DefaultRoot</code> is in effect, then the file
must reside inside the <code>chroot</code>ed directory. If the 
configured file cannot be found or accessed, no error occurs and nothing is
logged or displayed to the client.

<code>Display</code> Variables 
The following table contains the variables that can be used in
<code>Display</code> files. Be aware that not all of these may have a rational
value, depending on the context in which they are used (e.g.,
<code>%u</code> if <code>IdentLookups</code> are off).

Other <code>contrib</code> modules may provide additional variables for use
as well; please consult their documentation for more information.

<table border=1 summary="Display Variables">
 <tr>
 <td>Variable</td>
 <td>Meaning</td>
 </tr>

<tr>
 <td>%C</td>
 <td>Current working directory</td>
 </tr>

<tr>
 <td>%E</td>
 <td>Server admin's email address</td>
 </tr>

<tr>
 <td>%F</td>
 <td>Available space on file system, in KB</td>
 <tr>

<tr>
 <td>%f</td>
 <td>Available space on file system, with units</td>
 </tr>

<tr>
 <td>%i</td>
 <td>The number of files uploaded (input) in this session</td>
 </tr>

<tr>
 <td>%K</td>
 <td>Total number of bytes transferred</td>
 </tr>

<tr>
 <td>%k</td>
 <td>Total number of bytes transferred, in units</td>
 </tr>

<tr>
 <td>%L</td>
 <td>Local hostname</td>
 </tr>

<tr>
 <td>%M</td>
 <td>Maximum number of connections</td>
 </tr>

<tr>
 <td>%N</td>
 <td>Current number of connections</td>
 </tr>

<tr>
 <td>%o</td>
 <td>The number of files downloaded (output) in this session</td>
 </tr>

<tr>
 <td>%R</td>
 <td>Remote hostname</td>
 </tr>

<tr>
 <td>%T</td>
 <td>Current time</td>
 </tr>

<tr>
 <td>%t</td>
 <td>The number of files transferred (uploaded and downloaded) in this session</td>
 </tr>

<tr>
 <td>%U</td>
 <td>Username originally used to login</td>
 </tr>

<tr>
 <td>%u</td>
 <td>Username reported by ident protocol</td>
 </tr>

<tr>
 <td>%V</td>
 <td><code>ServerName</code> of virtual host, if any</td>
 </tr>

<tr>
 <td>%x</td>
 <td>The name of the user's <code>Class</code>, if any</td>
 </tr>

<tr>
 <td>%y</td>
 <td>Current number of connections from the user's <code>Class</code></td>
 </tr>

<tr>
 <td>%z</td>
 <td>Maximum number of connections from the user's <code>Class</code></td>
 </tr>

<tr>
 <td>%{total_bytes_in}</td>
 <td>The number of bytes uploaded (input) in this session</td>
 </tr>

<tr>
 <td>%{total_bytes_out}</td>
 <td>The number of bytes downloaded (output) in this session</td>
 </tr>

<tr>
 <td>%{total_bytes_xfer}</td>
 <td>The number of bytes transferred (uploaded and downloaded) in this session</td>
 </tr>

<tr>
 <td>%{total_files_in}</td>
 <td>The number of files uploaded (input) in this session</td>
 </tr>

<tr>
 <td>%{total_files_out}</td>
 <td>The number of files downloaded (output) in this session</td>
 </tr>

<tr>
 <td>%{total_files_xfer}</td>
 <td>The number of files transferred (uploaded and downloaded) in this session</td>
 </tr>

<tr>
 <td>%{env:name}</td>
 <td>The value of the environment variable name</td>
 </tr>

<tr>
 <td>%{time:format}</td>
 <td>Uses format (as per the <code>strftime(3)</code> function) to format a timestamp</td>
 </tr>
</table>

<a name="FAQ"></a>
Frequently Asked Questions

<a name="DisplayPathsWithSpaces">
Question: I configured a path which contains spaces for
<code>DisplayLogin</code>, and it doesn't work. Why not? 
Answer: If using paths/files which contains spaces,
make sure that you enclose the path in quotation marks, e.g.:
<pre>
 DisplayLogin "/path/to/display login.txt"
</pre>
Otherwise, the configuration file parser will treat the space-separated
portions of the path as separate directive parameters.

<a name="DisplayAvailableBytes">
Question: I configured a <code>DisplayLogin</code>
file which uses the <code>%F</code> variable, but it is not showing me the
correct amount of bytes available on my system. Why not? 
Answer: ProFTPD determines the available bytes for
the <code>%F</code>/<code>%f</code> variables based on the filesystem
containing the <code>Display</code> file.

For example, if your <code>Display</code> file is in <code>/etc/proftpd</code>,,
and the <code>/etc</code> directory is mounted on a small disk, then
<code>%F</code>/<code>%f</code> will only report on the bytes available in the
<code>/etc</code> filesystem, not on other filesystems (e.g. not
the <code>/home</code> filesystem).

</body>
</html>

${this.title}

Code Editor : DisplayFiles.html