RFR: 8349812: (fs) Files.newByteChannel with empty path name and CREATE_NEW throws unexpected exception [v4]

[Brian Burkhalter]

On Thu, 13 Feb 2025 10:37:44 GMT, Maxim Kartashev <mkartashev at openjdk.org> wrote:

>> `UnixFileChannelFactory.open()` checks for the current directory by looking at the first byte of the name, which in case of an empty path is simply not there. This check throws an `ArrayIndexOutOfBoundsException` and prevents the correct exception from being thrown.
>> 
>> The suggested solution is to use another method that translates a path name into a byte array called `getByteArrayForSysCalls()` that is specifically designed to handle the case of empty path names.
>> 
>> Tested by running `java/nio` tests on Linux.
>
> Maxim Kartashev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixed the test to pass on Windows also

Marked as reviewed by bpb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23560#pullrequestreview-2615829821