RFR: 8357425: (fs) SecureDirectoryStream setPermissions should use fchmodat

[Brian Burkhalter]

On Sat, 31 May 2025 06:36:33 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> Okay, let's go with what you have for now and we can mull over re-visiting this list. It dates from when the support for the "at" functions varied across operating systems and versions.

Agreed. On Linux, the `openat`, `unlinkat`, and `renameat` calls appear all, like `fchmodat`, to have been introduced in Linux version 2.6.16 which was in 2008, so I suspect these will be able to be dropped from the check. It would be helpful to know which of the calls are not available on AIX (@MBaesken).

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PR Comment: https://git.openjdk.org/jdk/pull/25534#issuecomment-2931326662