[libvirt-users] how to modify virsh vm start script

virsh start vmname What I want to know is how to add an option to virsh vm's start

ps aux | grep qemu

I use libvirt to manage a QEMU/KVM system. Starting a VM only by using script, in my case I want to add QEMU logging option (-d and -D). I can see from that current VM started using virsh not including those options ~ady