Enhance IpmiException to carry IPMI codenumber

In some cases, an exception warrants a different handling
depending on the code of the error.  Have the exception
carry the code up for calling code to make a decision.

Change-Id: Ie7e134d3a7d99eaa1ec3a82c6f39e82dc4422ca7

pyghmi/exceptions.py

@@ -2,6 +2,7 @@
 # vim: tabstop=4 shiftwidth=4 softtabstop=4
 
 # Copyright 2013 IBM Corporation
+# Copyright 2015 Lenovo
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -23,7 +24,9 @@ class PyghmiException(Exception):
 
 
 class IpmiException(PyghmiException):
-    pass
+    def __init__(self, text='', code=0):
+        super(IpmiException, self).__init__(text)
+        self.ipmicode = code
 
 
 class InvalidParameterValue(PyghmiException):

pyghmi/ipmi/command.py

@@ -1,6 +1,7 @@
 # vim: tabstop=4 shiftwidth=4 softtabstop=4
 
 # Copyright 2013 IBM Corporation
+# Copyright 2015 Lenovo
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -363,7 +364,7 @@ class Command(object):
             if self._sdr.sensors[sensor].name == sensorname:
                 rsp = self.raw_command(command=0x2d, netfn=4, data=(sensor,))
                 if 'error' in rsp:
-                    raise Exception(rsp['error'])
+                    raise exc.IpmiException(rsp['error'], rsp['code'])
                 return self._sdr.sensors[sensor].decode_sensor_reading(
                     rsp['data'])
         raise Exception('Sensor not found: ' + sensorname)