xattr_openat
if ((xattrfd = xattr_openat(basefd, view, O_XATTR)) < 0)
if ((xattrfd = xattr_openat(basefd, view, O_RDWR | O_XATTR)) < 0)
if ((xattrfd = xattr_openat(namefd, view, 0)) < 0) {
if ((xattrfd = xattr_openat(namefd, view, O_RDWR)) < 0) {