On 05. 01. 25 7:31, Cedric Blancher via Cygwin wrote:
Good morning!
Could Cygwin implement copy_file_range() support, including sparse
file support so holes are preserved, and
FSCTL_DUPLICATE_EXTENTS_TO_FILE support?
In theory, this could be used to implement that function. In practice,
the block cloning is only supported by ReFS. See
<https://learn.microsoft.com/en-us/windows/win32/api/winioctl/ni-winioctl-fsctl_duplicate_extents_to_file>
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