added example script which finds highest uidNumber/gidNumber values

Demo/pyasn1/sss_highest_number.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+"""
+This sample script demonstrates the use of the server-side-sorting control
+(see RFC 2891)
+
+Requires module pyasn1 (see http://pyasn1.sourceforge.net/)
+"""
+
+import pprint,ldap
+
+from ldap.controls.sss import SSSRequestControl
+
+uri = "ldap://ipa.demo1.freeipa.org"
+
+l = ldap.initialize(uri,trace_level=0)
+l.simple_bind_s('uid=admin,cn=users,cn=accounts,dc=demo1,dc=freeipa,dc=org','Secret123')
+
+for id_attr in ('uidNumber','gidNumber'):
+  sss_control = SSSRequestControl(ordering_rules=['-%s' % (id_attr)])
+  ldap_result = l.search_ext_s(
+    'dc=demo1,dc=freeipa,dc=org',
+    ldap.SCOPE_SUBTREE,
+    '(%s=*)' % (id_attr),
+    attrlist=[id_attr],
+    serverctrls = [sss_control],
+  )
+  print 'Highest value of %s' % (id_attr)
+  if ldap_result:
+    dn,entry = ldap_result[0]
+    print '->',entry[id_attr]
+  else:
+    print 'not found'