Since I don't have an email to reply-to, here is the link: https://www.redhat.com/archives/libvirt-cim/2012-December/msg00039.html In get_diskpool_config(): * Rather than use the "racy" NumOfStoragePools and ListStoragePools, why not use virConnectListAllStoragePools() passing the "Active" flag for all active pools only? * You may even want to consider keeping the returned virStoragePoolPtr structures around.. I also imagine the other objects (networks and domains) could use the similar calls. I guess the answer somewhat depends on what is the minimum version of libvirt that needs to be supported. But if you "have" to stay with the current model... * The return 'names[i]' is something you'd have to free() anyway, so rather than strdup(names[i]), just take it when setting pools[i].tag and set names[i] = NULL; That avoids an error path. John