diff -r 51983fcda6b1 -r a76571e27c6f bin/pvl.hosts-reverse
--- a/bin/pvl.hosts-reverse	Wed Feb 25 15:49:11 2015 +0200
+++ b/bin/pvl.hosts-reverse	Wed Feb 25 15:55:23 2015 +0200
@@ -1,6 +1,42 @@
 #!/usr/bin/env python
 
+import logging; log = logging.getLogger('pvl.hosts-reverse')
+import optparse 
+import pvl.args
+import pvl.hosts
 import pvl.hosts.zone
-import sys
 
-sys.exit(pvl.hosts.zone.reverse_main())
+def main (argv):
+    """
+        Generate bind zonefiles from host definitions.
+    """
+
+    parser = optparse.OptionParser(main.__doc__)
+    parser.add_option_group(pvl.args.parser(parser))
+    parser.add_option_group(pvl.hosts.config.optparser(parser))
+
+    parser.add_option('--reverse-zone',         metavar='PREFIX',
+            help="Generate reverse zone for prefix")
+
+    parser.add_option('--unknown-host',         metavar='NAME',
+            help="Generate records for unused IPs")
+
+    # input
+    options, args = pvl.args.parse(parser, argv)
+
+    if not options.reverse_zone:
+        log.fatal("required --reverse-zone")
+        return 1
+
+    hosts = pvl.hosts.apply(options, args)
+
+    # process
+    prefix = pvl.dns.parse_prefix(options.reverse_zone)
+
+    for rr in pvl.hosts.zone.apply_hosts_reverse(options, hosts, prefix):
+        print unicode(rr)
+
+    return 0
+
+if __name__ == '__main__':
+    pvl.args.main(main)