RFR: 8356493: (fs) SecureDirectoryStream missing some capabilities [v2]

[Brian Burkhalter]

On Thu, 4 Sep 2025 21:50:37 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> In my particular application, the target is an absolute `Path`, so having to open another directory stream to pass as the target dir would be roundabout.
>
>> In my particular application, the target is an absolute `Path`, so having to open another directory stream to pass as the target dir would be roundabout.
> 
> Thanks, that's helpful.

> I think this may also need a `LinkOption` flag to pass `AT_FOLLOW_SYMLINKS`?

Adding `LinkOption.FOLLOW_LINKS` could be confusing when there is already `LinkOption.NOFOLLOW_LINKS`. For consistency with the `Files` APIs, it might be better to follow links by default (`AT_SYMLINK_FOLLOW`). Also, the macOS man page for `linkat` states

On OS X, not assigning AT_SYMLINK_FOLLOW to flag may result in
some file systems returning an error.

which is not encouraging.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26950#discussion_r2325612518