MacOS file system changes between 7u10 and 7u40?

[Philippe Marschall]

On Fri, Sep 27, 2013 at 6:44 AM, Xueming Shen <xueming.shen at oracle.com> wrote:
> What we did in 7130915 is to normalize the native macos file name (in NFD)
> back into
> NFC for the File and Path, but passing the File/Path Java path name (in NFC)
> into macos's
> file system API directly (as it appears those APIs just work fine with NFC
> file name, though
> it stores them in NFD internally). This serves the purpose of having Java
> file name
> (File and Path, and their String representation) in NFC form consistently,
> cross all platforms.

This is not the behavior I'm seeing on Linux and Windows. They don't
seem to do any normalization at all (I read that Windows does NFC but
my tests seem to contradict this) and in addition you can have NFC and
NFD file names side by side. That means you can't have normalized
Paths in NFC on those platform at all times because then certain files
would not be accessible to Java.

I could not check ZFS which seems to be normalization-insensitive /
normalization-preserving [1]. This would open the option to normalize.

> As the consequence,  we can have a reasonable implement of file name
> equals() without
> involving string normalization, which is expensive. In "normal" use
> scenario, you should
> not have a file/path name (in String) passing around in NFD form.

 [1] https://blogs.oracle.com/nico/entry/normalization_insensitivity_should_be_the

Cheers
Philippe