RFR: 8355342: File.getCanonicalPath on Java 24 resolves paths on network drives to UNC format [v2]

[Francesco Andreuzzi]

On Tue, 16 Sep 2025 22:03:54 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> `File.getCanonicalPath` invokes `GetFinalPathNameByHandle` on the result of `canonicalize0` which causes the drive letter of a mapped drive to be converted to a UNC prefix. If such a substitution is detected, this request proposes to revert the conversion of drive letter to UNC prefix before returning the canonical path.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8355342: Fix possible sneaky NullPointerException

src/java.base/windows/classes/java/io/WinNTFileSystem.java line 463:

> 461:     }
> 462: 
> 463:     private static final long HKEY_CURRENT_USER =0x80000001L;

Suggestion:

    private static final long HKEY_CURRENT_USER = 0x80000001L;

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PR Review Comment: https://git.openjdk.org/jdk/pull/27324#discussion_r2353753718