prstatus
struct prstatus prstatus;
ATF_REQUIRE(vec.iov_len == sizeof(prstatus));
memset(&prstatus, 0, sizeof(prstatus));
vec.iov_base = &prstatus;
ATF_REQUIRE(vec.iov_len == sizeof(prstatus));
ATF_REQUIRE(vec.iov_base == &prstatus);
ATF_REQUIRE(prstatus.pr_statussz == sizeof(prstatus));