_scf_snapshot_take_attach
if (_scf_snapshot_take_attach(inst, snap) == 0)
if (_scf_snapshot_take_attach(inst, snap) != 0) {
if (_scf_snapshot_take_attach(cur_inst, prev) != 0)
int _scf_snapshot_take_attach(scf_instance_t *, scf_snapshot_t *);