only ask for OTP if stdin is a tty

src/python/sso/urllib2_handler.py

 
 import cookielib
 import getpass
+import os
 import urllib2
 import urllib
 import re
+import sys
 
 
 class SSOProcessor(urllib2.BaseHandler):
@@ -40,8 +42,11 @@ class SSOProcessor(urllib2.BaseHandler):
                             self._username, form_data['s'].rstrip('/')))
                 form_data['password'] = self._password
                 if self._otp_pattern.search(response_data):
-                    form_data['otp'] = raw_input('OTP for %s@%s: ' % (
-                        self._username, form_data['s'].rstrip('/')))
+                    # Only ask for an OTP when the standard input is a tty,
+                    # otherwise simply don't send any OTP.
+                    if os.isatty(sys.stdin):
+                        form_data['otp'] = raw_input('OTP for %s@%s: ' % (
+                            self._username, form_data['s'].rstrip('/')))
                 newreq = urllib2.Request(request_baseurl, 
                                          data=urllib.urlencode(form_data))
                 newreq.sso_attempt = True