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<H2><A NAME="SECTION00061000000000000000"></A><A NAME="clamd"></A> |
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Clam daemon |
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</H2> |
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<code>clamd</code> is a multi-threaded daemon that uses <SPAN CLASS="textit">libclamav</SPAN>
to scan files for viruses. It may work in one or both modes listening on: |
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<UL> |
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<LI>Unix (local) socket
</LI>
<LI>TCP socket
</LI>
</UL>
The daemon is fully configurable via the <code>clamd.conf</code> file |
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<A NAME="tex2html18"
HREF="footnode.html#foot233"><SUP><SPAN CLASS="arabic">6</SPAN></SUP></A>. <code>clamd</code> recognizes the following commands: |
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<UL>
<LI><SPAN CLASS="textbf">PING</SPAN>
<BR>
Check the daemon's state (should reply with "PONG").
</LI>
<LI><SPAN CLASS="textbf">VERSION</SPAN>
<BR>
Print program and database versions.
</LI>
<LI><SPAN CLASS="textbf">RELOAD</SPAN>
<BR>
Reload the databases.
</LI>
<LI><SPAN CLASS="textbf">SHUTDOWN</SPAN>
<BR>
Perform a clean exit.
</LI>
<LI><SPAN CLASS="textbf">SCAN file/directory</SPAN>
<BR>
Scan file or directory (recursively) with archive support
enabled (a full path is required).
</LI>
<LI><SPAN CLASS="textbf">RAWSCAN file/directory</SPAN>
<BR>
Scan file or directory (recursively) with archive and special file
support disabled (a full path is required).
</LI>
<LI><SPAN CLASS="textbf">CONTSCAN file/directory</SPAN>
<BR>
Scan file or directory (recursively) with archive support
enabled and don't stop the scanning when a virus is found.
</LI>
<LI><SPAN CLASS="textbf">MULTISCAN file/directory</SPAN> |
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<BR> |
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Scan file in a standard way or scan directory (recursively) using
multiple threads (to make the scanning faster on SMP machines). |
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</LI> |
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<LI><SPAN CLASS="textbf">STREAM</SPAN>
<BR>
Scan stream: <code>clamd</code> will return a new port number you should
connect to and send data to scan.
</LI>
<LI><SPAN CLASS="textbf">SESSION, END</SPAN>
<BR>
Start/end a <code>clamd</code> session - you can do multiple commands
per TCP session (WARNING: due to the <code>clamd</code> implementation the
<SPAN CLASS="textbf">RELOAD</SPAN> command will break the session).
</LI>
</UL>
and reacts on the special signals:
<UL>
<LI><SPAN CLASS="textbf">SIGTERM</SPAN> - perform a clean exit
</LI>
<LI><SPAN CLASS="textbf">SIGHUP</SPAN> - reopen the log file
</LI>
<LI><SPAN CLASS="textbf">SIGUSR2</SPAN> - reload the database |
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</LI>
</UL> |
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Clamd should not be started in the background using the shell operator
<code>&</code> or external tools. Instead, you should run and wait for clamd
to load the database and daemonize itself. After that, clamd is instantly
ready to accept connections and perform file scanning. |
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<ADDRESS>
Tomasz Kojm |
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2008-10-30 |
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