vntsd
(void) thr_kill(groupp->vntsd->tid, SIGUSR1);
vntsdp = groupp->vntsd;
struct vntsd;
struct vntsd *vntsd;
assert(groupp->vntsd);
(void) mutex_lock(&groupp->vntsd->lock);
(void) vntsd_que_rm(&groupp->vntsd->grouppq,
(void) mutex_unlock(&groupp->vntsd->lock);
groupp->vntsd = vntsdp;