shm_fill
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);
ATF_REQUIRE(shm_fill(fd, 0, shm_sz) == 0);