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109 lines
3.3 KiB
HTML
109 lines
3.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<HTML>
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<HEAD>
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<TITLE>Database reloading</TITLE>
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<META NAME="description" CONTENT="Database reloading">
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<META NAME="keywords" CONTENT="clamdoc">
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
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<BR>
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<B> Next:</B> <A NAME="tex2html772"
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HREF="node45.html">Data scan functions</A>
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<B> Up:</B> <A NAME="tex2html768"
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HREF="node31.html">LibClamAV</A>
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<B> Previous:</B> <A NAME="tex2html762"
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HREF="node43.html">Engine structure</A>
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<B> <A NAME="tex2html770"
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HREF="node1.html">Contents</A></B>
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<BR>
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<BR></DIV>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION00074000000000000000">
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Database reloading</A>
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</H2>
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The most important thing is to keep the internal instance of the database
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up to date. You can watch database changes with the <code>cl_stat</code>
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family of functions.
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<PRE>
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int cl_statinidir(const char *dirname, struct cl_stat *dbstat);
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int cl_statchkdir(const struct cl_stat *dbstat);
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int cl_statfree(struct cl_stat *dbstat);
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</PRE>
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Initialization:
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<PRE>
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...
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struct cl_stat dbstat;
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memset(&dbstat, 0, sizeof(struct cl_stat));
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cl_statinidir(dbdir, &dbstat);
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</PRE>
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To check for a change you just need to call <code>cl_statchkdir</code> and check
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its return value (0 - no change, 1 - some change occured):
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<PRE>
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if(cl_statchkdir(&dbstat) == 1) {
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reload_database...;
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cl_statfree(&dbstat);
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cl_statinidir(cl_retdbdir(), &dbstat);
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}
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</PRE>
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Remember to reset the <code>cl_stat</code> structure after reload.
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<P>
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<BR><HR>
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<!--Table of Child-Links-->
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
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<UL CLASS="ChildLinks">
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<LI><A NAME="tex2html773"
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HREF="node45.html">Data scan functions</A>
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<LI><A NAME="tex2html774"
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HREF="node46.html">Memory</A>
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<LI><A NAME="tex2html775"
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HREF="node47.html">Forking daemons</A>
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<LI><A NAME="tex2html776"
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HREF="node48.html">clamav-config</A>
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<LI><A NAME="tex2html777"
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HREF="node49.html">Example</A>
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</UL>
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<!--End of Table of Child-Links-->
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<BR><HR>
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<ADDRESS>
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Tomasz Kojm
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2008-10-15
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</ADDRESS>
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</BODY>
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</HTML>
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