- similar funny business), or if DIR is not readable. This avoids a
- minor race condition between when a directory is created or statted
- and when the process chdirs into it. */
+ similar funny business). This avoids a minor race condition
+ between when a directory is created or statted and when the process
+ chdirs into it.
+
+ On older systems lacking full support for O_SEARCH, this function
+ can also fail if DIR is not readable. */