[Libvir] What is the Difference Between virConnCopyLastError and virCopyLastError?

[ajishrao <ajishrao gmail com>]

Hi,
         I am little confused about these api's such as virConnCopyLastError and virCopyLastError. Please correct my understanding.

1. virConnCopyLastError expects 2 parameter connection and virErrorPtr, This is used only after getting successful connection, If i call this without connection say it is NULL, I hope it will return -1 if no what will it return?

2. virCopyLastError expects on 1 parameter virErrorPtr, this can be used any time, even before getting connection, If it is No. Then when will i use virCopyLastError api?


3. If virConnectOpen/virConnectOpenReadOnly fails which api should be called to know the error code?

Thanks & Regards
--Ajish