uns 28 tools/testing/selftests/nsfs/owner.c int pfd[2], ns, uns, init_uns; uns 60 tools/testing/selftests/nsfs/owner.c uns = ioctl(ns, NS_GET_USERNS); uns 61 tools/testing/selftests/nsfs/owner.c if (uns < 0) uns 64 tools/testing/selftests/nsfs/owner.c if (fstat(uns, &st1)) uns 74 tools/testing/selftests/nsfs/owner.c init_uns = ioctl(uns, NS_GET_USERNS); uns 75 tools/testing/selftests/nsfs/owner.c if (uns < 0)