Protect all selinux calls with try/except

setup

@@ -124,16 +124,34 @@ class Facts(object):
             self.facts['selinux']['status'] = 'disabled'
         else:
             self.facts['selinux']['status'] = 'enabled'
+            try:
                 self.facts['selinux']['policyvers'] = selinux.security_policyvers()
+            except:
+                self.facts['selinux']['policyvers'] = 'unknown'
+            try:
                 (rc, configmode) = selinux.selinux_getenforcemode()
                 if rc == 0 and Facts.SELINUX_MODE_DICT.has_key(configmode):
                     self.facts['selinux']['config_mode'] = Facts.SELINUX_MODE_DICT[configmode]
+                else:
+                    self.facts['selinux']['config_mode'] = 'unknown'
+            except OSError, e:
+                self.facts['selinux']['config_mode'] = 'unknown'
+            try:
                 mode = selinux.security_getenforce()
                 if Facts.SELINUX_MODE_DICT.has_key(mode):
                     self.facts['selinux']['mode'] = Facts.SELINUX_MODE_DICT[mode]
+                else:
+                    self.facts['selinux']['mode'] = 'unknown'
+            except OSError, e:
+                self.facts['selinux']['mode'] = 'unknown'
+            try:
                 (rc, policytype) = selinux.selinux_getpolicytype()
                 if rc == 0:
                     self.facts['selinux']['type'] = policytype
+                else:
+                    self.facts['selinux']['type'] = 'unknown'
+            except OSError, e:
+                self.facts['selinux']['type'] = 'unknown'
 
 class Hardware(Facts):
     """