ksem_get
error = ksem_get(SCARG(uap, id), &ks, &fd);
error = ksem_get(id, &ks, &fd);
error = ksem_get(id, &ks, &fd);
error = ksem_get(SCARG(uap, id), &ks, &fd);
error = ksem_get(id, &ks, &fd);