--- a/bin/pvl.rrd-interfaces	Sun Sep 07 14:42:50 2014 +0300
+++ b/bin/pvl.rrd-interfaces	Sun Sep 07 15:52:19 2014 +0300
@@ -119,18 +119,21 @@
 def main (argv) :
     options, args = parse_argv(argv)
     
-    for txt in args :
+    for path in args :
         # <path>/<domain>-<plugin>.txt -> <path>/<domain>-<plugin>
-        basepath, _ = os.path.splitext(txt)
+        if '.txt' in path:
+            basepath, _ = os.path.splitext(path)
+        else:
+            basepath = path
+        
+        # <path>/<domain> -> <domain>
+        _, basename = os.path.split(basepath)
         
         # <path>/<domain>-<plugin> -> <path>/<domain>, <plugin>
-        if '-' in basepath :
-            basepath, collectd_plugin = basepath.rsplit('-', 1)
+        if '-' in basename :
+            basename, collectd_plugin = basename.rsplit('-', 1)
         else :
             collectd_plugin = None
-
-        # <path>/<domain> -> <domain>
-        _, basename = os.path.split(basepath)
         
         # domain?
         if options.domain is None :
@@ -141,13 +144,14 @@
             domain = options.domain
         
         # output dir?
-        if options.rrd :
-            rrddir = options.rrd
-        else :
-            rrddir = basepath
+        if not options.rrd:
+            log.error("no --rrd output dir given")
+            return 1
+
+        rrddir = options.rrd
 
         # generate links from spec
-        links = list(pvl.rrd.hosts.collectd_interfaces(options, open(txt),
+        links = list(pvl.rrd.hosts.collectd_interfaces(options, open(path),
             collectd_domain     = domain,
             collectd_plugin     = options.collectd_plugin or collectd_plugin or COLLECTD_PLUGIN,
         ))