> Rename isn't quite an atomic replacement. If you crash before the rename, the new file hangs around. (Hence unwanted .part files.) It seems O_TMPFILE cannot

> Rename isn't quite an atomic replacement. If you crash before the rename, the new file hangs around. (Hence unwanted .part files.) It seems O_TMPFILE cannot be used to atomically replace existing files either. If only one could use renameat2() on a raw fd or force linkat() to an atomic overwrite.