On 25/02/2023 00:00, Alex Colomar wrote:
Hi Günther,
On 2/21/23 17:52, Günther Noack wrote:
[...]
Sorry for taking so much time in looking into this!
+ *
+ * * The reparented file may not gain more access rights in the destination
+ * directory than it previously had in the source directory. If this is
+ * attempted, the operation results in an ``EXDEV`` error.
+ *
+ * * When linking or renaming, the ``LANDLOCK_ACCESS_FS_MAKE_*`` right for the
+ * respective file type must be granted for the destination directory.
+ * Otherwise, the operation results in an ``EACCES`` error.
+ *
+ * * When renaming, the ``LANDLOCK_ACCESS_FS_REMOVE_*`` right for the
+ * respective file type must be granted for the source directory. Otherwise,
+ * the operation results in an ``EACCES`` error.
+ *
+ * If multiple requirements are not met, the ``EACCES`` error code takes
+ * precedence over ``EXDEV``.
Is this something worth guaranteeing, or just an implementation detail
that may easily change?
There is a deliberate effort to keep this error priority to be able to
know if a rename or link action can be replaced with a file copy, which
is useful e.g., for `mv`.
