[libvirt-users] libvirt virDomainDestroy

When stop a qemu vm via libvirt api, I call virDomainShutdown, I can seen the vm shutdown process, But I call virDomainDestroyFlags with VIR_DOMAIN_DESTROY_GRACEFULL ,I can't seen the vm shutdown process, virDomainDestroyFlags with VIR_DOMAIN_DESTROY_GRACEFULL is gave vm driver process a SIGTERM , how vm driver process SIGTERM signal (like qemu). Thanks