Do not gather mem facts if command invalid (#40820) (#41141)

* Do not gather mem facts if command invalid (#40820)

* Do not gather mem facts if command invalid

In some firmwares, 'show memory statistics' fail, thus
do not populate mem if we got a failure after running that command.

* Fix pep8

* Warn if got error when running 'sh memory statistics'

* Fix pep8

(cherry picked from commit 669949e6a3)

* Update ios_facts.py (#40928)

Account for upper/lower case match occurrences of "[Nn]umber" and "[Ss]erial"

Model Number                       : WS-C3850-12X48U
System Serial Number          :  <removed>

(cherry picked from commit 12d221152b)

* Expand ios password prompt regex (#41131)


(cherry picked from commit 49fddb6f28)

lib/ansible/modules/network/ios/ios_facts.py

@@ -204,11 +204,11 @@ class Default(FactsBase):
             return match.group(1)
 
     def parse_stacks(self, data):
-        match = re.findall(r'^Model number\s+: (\S+)', data, re.M)
+        match = re.findall(r'^Model [Nn]umber\s+: (\S+)', data, re.M)
         if match:
             self.facts['stacked_models'] = match
 
-        match = re.findall(r'^System serial number\s+: (\S+)', data, re.M)
+        match = re.findall(r'^System [Ss]erial [Nn]umber\s+: (\S+)', data, re.M)
         if match:
             self.facts['stacked_serialnums'] = match
 
@@ -228,6 +228,9 @@ class Hardware(FactsBase):
 
         data = self.responses[1]
         if data:
+            if 'Invalid input detected' in data:
+                warnings.append('Unable to gather memory statistics')
+            else:
                 processor_line = [l for l in data.splitlines()
                                   if 'Processor' in l].pop()
                 match = re.findall(r'\s(\d+)\s', processor_line)
@@ -446,6 +449,9 @@ FACT_SUBSETS = dict(
 
 VALID_SUBSETS = frozenset(FACT_SUBSETS.keys())
 
+global warnings
+warnings = list()
+
 
 def main():
     """main entry point for module execution
@@ -508,7 +514,6 @@ def main():
         key = 'ansible_net_%s' % key
         ansible_facts[key] = value
 
-    warnings = list()
     check_args(module, warnings)
 
     module.exit_json(ansible_facts=ansible_facts, warnings=warnings)

lib/ansible/plugins/terminal/ios.py

@@ -64,7 +64,7 @@ class TerminalModule(TerminalBase):
         if passwd:
             # Note: python-3.5 cannot combine u"" and r"" together.  Thus make
             # an r string and use to_text to ensure it's text on both py2 and py3.
-            cmd[u'prompt'] = to_text(r"[\r\n]password: ?$", errors='surrogate_or_strict')
+            cmd[u'prompt'] = to_text(r"[\r\n](?:Local_)?[Pp]assword: ?$", errors='surrogate_or_strict')
             cmd[u'answer'] = passwd
             cmd[u'prompt_retry_check'] = True
         try: