Re: [PATCH v11 0/5] MR9112: XCOPY and COPY should not attempt to copy a file to itself.

[Joe Souza (＠JoeS209)]

On Thu Nov  6 08:25:45 2025 +0000, eric pouech wrote:
> perhaps a simple approach would be to detect if same file in the case of
> CopyFileW fails
> this would:
> * avoid adding extra variables that complexify the whole code flow, and
> add states that should be handled in various places...
> * avoid checking for the same file in successful copies (and spend
> unneeded time in it)
> CopyFileW returns ERROR_SHARING_VIOLATION in the case where a file is attempted to copy onto itself.  How to differentiate between this and copying onto a different file that may be open by another process?  That is the purpose of the IsSameFile function.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9112#note_121035