Added --delete option to remove host from zone

Added --quiet option to suppress output

TODO

@@ -23,6 +23,7 @@ Done:
   -k keyname
   -n hostname
   -p password
+  -q quiet
   -t ttl
 - Auto-detect the machine's external ip address'
   Should work on OS X, Linux and Windows. 

dnsupdate.py

@@ -2,11 +2,13 @@
 # dnsupdate.py
 # Updates a dynamic dns-record using a TSIG key.
 
+
 def checkerror(msg):
   if len(msg['error']) > 0:
-    for error in msg['error']:
-      print "Error: %s" % error
-    print "Use -h for help"
+    if not msg.has_key('quiet'):
+      for error in msg['error']:
+        print "Error: %s" % error
+      print "Use -h for help"
     return 1
   else:
     return 0
@@ -35,6 +37,9 @@ def getparams(msg):
   parser.add_option("-c", "--config", 
                     type="string",
                     help="Alternate config file")
+  parser.add_option("--delete", 
+                    action="store_true",
+                    help="Remove the host from the zone")
   parser.add_option("-d", "--domain", 
                     type="string",
                     help="Domain to update")
@@ -50,6 +55,9 @@ def getparams(msg):
   parser.add_option("-p", "--password", 
                     type="string",
                     help="TSIG key")
+  parser.add_option("-q", "--quiet", 
+                    action="store_true",
+                    help="Quit mode")
   parser.add_option("-t", "--ttl", 
                     type="int",
                     help="TTL in seconds")
@@ -68,6 +76,8 @@ def getparams(msg):
     if ip:
       msg['ipaddress'] = ip
 
+  if options.delete:
+    msg['delete'] = options.delete
   if options.domain:
     msg['domain'] = options.domain
   if options.keyname:
@@ -76,9 +86,12 @@ def getparams(msg):
     msg['hostname'] = options.name
   if options.password:
     msg['keysecret'] = options.password
+  if options.quiet:
+    msg['quiet'] = options.quiet
   if options.ttl:
     msg['ttl'] = options.ttl
-  
+    
+ 
   return msg
 
 
@@ -120,8 +133,11 @@ def update(msg):
   # dns.update.Update(name of domain, keyring, keyname)
   update = dns.update.Update(msg['domain'], keyring=keyring, keyname=msg['keyname'])
 
-  # update.replace(hostname, ttl, record-type, new ip)
-  update.replace(msg['hostname'], msg['ttl'], 'a', msg['ipaddress'])
+  if msg.has_key('delete'):
+    update.delete(msg['hostname'])
+  else:
+    # update.replace(hostname, ttl, record-type, new ip)
+    update.replace(msg['hostname'], msg['ttl'], 'a', msg['ipaddress'])
 
   # doit, servername
   try: 
@@ -131,10 +147,14 @@ def update(msg):
     return 
   
   # Verify response
-  if response.rcode() == 0:
-    print "Host '%s.%s' has been added with ip address %s" % (msg['hostname'], msg['domain'], msg['ipaddress'])
-  else:
-    print "An error has occurred, the server returned:\n%s" % response
+  if not msg.has_key('quiet'):
+    if response.rcode() == 0:
+      if msg.has_key("delete"):
+        print "Host '%s.%s' has been deleted" % (msg['hostname'], msg['domain'])
+      else:
+        print "Host '%s.%s' has been added with ip address %s" % (msg['hostname'], msg['domain'], msg['ipaddress'])
+    else:
+      print "An error has occurred, the server returned:\n%s" % response
 
 
 
@@ -167,12 +187,15 @@ def verify_ip(msg):
   except:
     ip = ""
   
-  if ip == msg['ipaddress']:
+  if ip == msg['ipaddress'] and not msg.has_key('delete'):
     msg['error'].append("Nameserver already up to date")
+  elif ip == "" and msg.has_key('delete'):
+    msg['error'].append("Nameserver does not recognise the hostname")
   
   return msg
 
 if __name__=="__main__":
+  import sys
   msg = {}
   msg['error'] = []
 
@@ -183,3 +206,8 @@ if __name__=="__main__":
   if err == 0:
     update(msg)
     checkerror(msg)
+    if err == 0:
+      sys.exit(0)
+
+  sys.exit(1)
+