diff -r 6b3f30fcded7 -r 1ef2f7bf5a03 bin/pvl.verkko-rrd-interfaces
--- a/bin/pvl.verkko-rrd-interfaces	Sun Jan 27 15:22:28 2013 +0200
+++ b/bin/pvl.verkko-rrd-interfaces	Sun Jan 27 15:33:10 2013 +0200
@@ -38,6 +38,8 @@
     """
 
     host = None
+        
+    log.info("scanning %s/<host>.%s/%s/%s-<port>.rrd", options.collectd_rrd, collectd_domain, collectd_plugin, options.collectd_type)
 
     for idx, line in enumerate(file, 1) :
         line = line.rstrip()
@@ -63,7 +65,7 @@
         
         # flip from DNS-ordering -> path-ordering
         if options.reverse_host :
-            interface_host = '.'.join(reversed(interface_host.split('.')))
+            interface_host = hostreverse(interface_host)
 
         # host has domain in collectd?
         if collectd_domain :
@@ -96,6 +98,8 @@
         Sync given (collectd, name) symlinks in given dir.
     """
 
+    log.info("%s", dir)
+
     for path, name in links :
         link = os.path.join(dir, name)
 
@@ -103,7 +107,7 @@
         if os.path.exists(link) :
             continue
             
-        log.info("%s: %s: %s", dir, link, path)
+        log.info("%s: %s: %s", dir, name, path)
         
         yield link, path
 
@@ -196,7 +200,8 @@
 
         # <path>/<domain> -> <domain>
         _, basename = os.path.split(basepath)
-
+        
+        # domain?
         if options.domain is None :
             # reverse-order hostname
             domain = hostreverse(basename)
@@ -204,15 +209,28 @@
             # may be ''
             domain = options.domain
         
+        # output dir?
+        if options.rrd :
+            rrd_domain = hostreverse(domain) if options.reverse_host else domain
+            rrd = os.path.join(options.rrd, rrd_domain)
+        else :
+            rrd = basepath
+
         # generate links from spec
         links = list(collectd_interfaces(options, open(txt),
             collectd_domain     = domain,
             collectd_plugin     = options.collectd_plugin or collectd_plugin or COLLECTD_PLUGIN,
         ))
+
+        if not os.path.exists(rrd) :
+            log.warn("mkdir: %s", rrd)
+
+            if not options.noop :
+                os.mkdir(rrd)
         
         # sync missing links
         links = list(sync_links(options, links,
-            dir     = options.rrd or basepath,
+            dir     = rrd,
         ))
         
         # verbose