From Panu Matilainen: update the code to work with rpm-4.9
I'm waiting for better version from Panu to work with all versions of rpm >= 4.1
and then I'll post it upstream.

diff -up net-snmp-5.6.1/agent/mibgroup/host/data_access/swinst_rpm.c.rpm-sanity net-snmp-5.6.1/agent/mibgroup/host/data_access/swinst_rpm.c
--- net-snmp-5.6.1/agent/mibgroup/host/data_access/swinst_rpm.c.rpm-sanity	2010-11-05 12:00:21.000000000 +0200
+++ net-snmp-5.6.1/agent/mibgroup/host/data_access/swinst_rpm.c	2011-01-18 09:55:44.000000000 +0200
@@ -34,6 +34,7 @@
 #endif
 #ifdef HAVE_RPM_RPMDB_H
 #include <rpm/rpmdb.h>
+#include <rpm/rpmts.h>
 #endif
 
 #include <net-snmp/net-snmp-includes.h>
@@ -64,14 +65,8 @@ netsnmp_swinst_arch_init(void)
     rpmdbpath = rpmGetPath( "%{_dbpath}", NULL );
     dbpath = rpmdbpath;
 #else
-#ifdef RPMVAR_DBPATH
-    rpmReadConfigFiles( NULL, NULL, NULL, 0 );
-    rpmdbpath = rpmGetVar( RPMVAR_DBPATH );
-    dbpath = rpmdbpath;
-#else
     dbpath = "/var/lib/rpm";   /* Most likely */
 #endif
-#endif
 
     snprintf( pkg_directory, SNMP_MAXPATH, "%s/Packages", dbpath );
     if (-1 == stat( pkg_directory, &stat_buf ))
@@ -96,32 +91,25 @@ netsnmp_swinst_arch_shutdown(void)
 int
 netsnmp_swinst_arch_load( netsnmp_container *container, u_int flags)
 {
-    rpmdb                 db;
+    rpmts                 ts;
 
-#if defined(RPMDBI_PACKAGES)
     rpmdbMatchIterator    mi;
-#else
-    int                   offset;
-#endif
     Header                h;
-    char                 *n, *v, *r, *g;
-    int32_t              *t;
+    char                 *nvr;
+    const char           *g;
     time_t                install_time;
     size_t                date_len;
     int                   rc, i = 1;
     netsnmp_swinst_entry *entry;
 
-    if (rpmdbOpen("", &db, O_RDONLY, 0644))
-	NETSNMP_LOGONCE((LOG_ERR, "rpmdbOpen() failed\n"));
+    ts = rpmtsCreate();
+    rpmtsSetVSFlags( ts, (_RPMVSF_NOSIGNATURES|_RPMVSF_NODIGESTS));
+
+    mi = rpmtsInitIterator( ts, RPMDBI_PACKAGES, NULL, 0);
+    if (mi == NULL)
+        NETSNMP_LOGONCE((LOG_ERR, "rpmdbOpen() failed\n"));
 
-#if defined(RPMDBI_PACKAGES)
-    mi = rpmdbInitIterator( db, RPMDBI_PACKAGES, NULL, 0);
     while (NULL != (h = rpmdbNextIterator( mi )))
-#else
-    for (offset  = rpmdbFirstRecNum( db );
-         offset != 0;
-         offset  = rpmdbNextRecNum(  db, offset ))
-#endif
     {
 
         entry = netsnmp_swinst_entry_create( i++ );
@@ -129,35 +117,27 @@ netsnmp_swinst_arch_load( netsnmp_contai
             continue;   /* error already logged by function */
         rc = CONTAINER_INSERT(container, entry);
 
-#if defined(RPMDBI_PACKAGES)
         h = headerLink( h );
-#else
-        h = rpmdbGetRecord( db, offset );
-#endif
-        headerGetEntry( h, RPMTAG_NAME,        NULL, (void**)&n, NULL);
-        headerGetEntry( h, RPMTAG_VERSION,     NULL, (void**)&v, NULL);
-        headerGetEntry( h, RPMTAG_RELEASE,     NULL, (void**)&r, NULL);
-        headerGetEntry( h, RPMTAG_GROUP,       NULL, (void**)&g, NULL);
-        headerGetEntry( h, RPMTAG_INSTALLTIME, NULL, (void**)&t, NULL);
+        nvr = headerGetAsString( h, RPMTAG_NVR);
+        g = headerGetString( h, RPMTAG_GROUP);
+        install_time = headerGetNumber( h, RPMTAG_INSTALLTIME);
 
         entry->swName_len = snprintf( entry->swName, sizeof(entry->swName),
-                                      "%s-%s-%s", n, v, r);
+                                      "%s", nvr);
         if (entry->swName_len > sizeof(entry->swName))
             entry->swName_len = sizeof(entry->swName);
         entry->swType = (NULL != strstr( g, "System Environment"))
                         ? 2      /* operatingSystem */
                         : 4;     /*  application    */
 
-        install_time = *t;
         entry->swDate_len = snprintf( entry->swDate, sizeof(entry->swDate),
                                       "%s", date_n_time( &install_time, &date_len ));
 
         headerFree( h );
+        free(nvr);
     }
-#if defined(RPMDBI_PACKAGES)
     rpmdbFreeIterator( mi );
-#endif
-    rpmdbClose( db );
+    rpmtsFree( ts );
 
     DEBUGMSGTL(("swinst:load:arch", "loaded %d entries\n",
                 (int)CONTAINER_SIZE(container)));