[libvirt-users] virsh snapshot-create-as: change umask on snapshots

I scripted the creation of snapshots and it works fine. Now I'd like to run the script as non-root. virsh snapshot-create-as --domain hq-live-v01 \      --name snappy \      --diskspec vda,file=/var/lib/libvirt/images/hq-live-v01.snappy,snapshot=external \      --diskspec vdb,file=/var/lib/libvirt/images/hq-live-storage.snappy,snapshot=external \      --disk-only --quiesce --atomic This fragment creates the snapshots, but get created with mode 0600: -rw-------  1 qemu qemu     393216 Mar 19 17:08 hq-live-storage.snappy -rw-------  1 qemu qemu    1048576 Mar 19 17:08 hq-live-v01.snappy The user account is in the libvirt group and has permissions to do everything except delete the files created by the snapshot, all I need is to get the snapshots created with 0660 mode. This is on a Centos 7.6 installation.  What knobs do I need to turn to control the umask? Thanks, -Mike