SFTP support for subsecond times

[Mingye Wang (Artoria2e5)]

On 5/24/2023 8:44 AM, Ben Lindstrom wrote:
> As filesystem sharing 
> protocols have oddies between platforms that add a lot of complexity and 
> are unsuited for the original sftp purpose.

OpenSSH has done this platform thing before.  In 2008, Damien Miller 
introduced extensions to perform statvfs(2), df(1), and rename over 
sftp.  The code survives to this day and the extension request remains 
documented in PROTOCOL.[1]

   [1]: 
https://github.com/openssh/openssh-portable/commit/d671e5a978efd5ba949d3fdcd03f728dcd68c636

Maybe it should do it again.  Timestamps are a lot less tied to the 
platform compared to these extensions.

Sincerely,
Mingye Wang