catch all exceptions and emit sensible errors - if we have a config file error this lets us know about it

yum

@@ -311,16 +311,23 @@ def main():
 
     
     if 'list' in params:
+        try:
             my = yum_base(conf_file=params['conf_file'], cachedir=True)
             results = dict(results=list_stuff(my, params['list']))
+        except Exception, e:
+            return 1, str(e)
+            
     elif 'state' in params:
         if 'pkg' not in params:
             results['msg'] = "No pkg specified"
         else:
+            try:
                 my = yum_base(conf_file=params['conf_file'], cachedir=True)        
                 state = params['state']
                 pkgspec = params['pkg']
                 results = ensure(my, state, pkgspec)
+            except Exception, e:
+                return 1, str(e)
 
     print json.dumps(results)
     return 0, None