From 87acdfaf80b54f820ff044cb424466a3f2c29781 Mon Sep 17 00:00:00 2001
From: opi <opi@zeropi.net>
Date: Tue, 26 Apr 2016 12:03:18 +0200
Subject: [PATCH] [enh] Add some comments.

---
 dynette.cron.py | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/dynette.cron.py b/dynette.cron.py
index f3c0089..8662f5b 100755
--- a/dynette.cron.py
+++ b/dynette.cron.py
@@ -30,7 +30,10 @@ from urllib import urlopen
 master_key_path = os.path.join(os.path.dirname(__file__), 'master.key')
 master_key = open(master_key_path).read().rstrip()
 
+# Bind configuration
 lines = ['// Generated by Dynette CRON']
+
+# Loop through Dynette servers
 for url in subs_urls:
 
     lines.extend([
@@ -40,9 +43,11 @@ for url in subs_urls:
             '};',
     ])
 
+    # Get available DynDNS domains
     domains = json.loads(str(urlopen(url +'/domains').read()))
     for domain in domains:
-        result = json.loads(str(urlopen(url +'/all/'+ domain).read()))
+
+        # Create zone database if not present
         if not os.path.exists(zone_dir + domain +'.db'):
             db_lines = [
                 '$ORIGIN .',
@@ -63,6 +68,7 @@ for url in subs_urls:
             with open(zone_dir + domain +'.db', 'w') as zone:
                 for line in db_lines:
                     zone.write(line + '\n')
+
         lines.extend([
                 'zone "'+ domain +'" {',
                 '   type master;',
@@ -71,6 +77,8 @@ for url in subs_urls:
                 '       grant dynette. wildcard *.'+ domain +'. ANY;',
         ])
 
+        # Get registered sub-domains
+        result = json.loads(str(urlopen(url +'/all/'+ domain).read()))
         for entry in result:
             for subd, type in allowed_operations.items():
                 if subd == '.': subd = ''
@@ -90,13 +98,18 @@ for url in subs_urls:
                 '};',
             ])
 
+# Backup old Bind configuration file.
 os.system('cp '+ conf_file +' '+ conf_file +'.back')
 
+# Write Bind configuration file.
 with open(conf_file, 'w') as zone:
     for line in lines:
         zone.write(line + '\n')
 
+# Restore ownership
 os.system('chown -R bind:bind '+ zone_dir +' '+ conf_file)
+
+# Reload Bind
 if os.system('/usr/sbin/rndc reload') == 0:
     exit(0)
 else: