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How can I copy deep path readonly files and keep the file time metadata?

The challenge I'm trying to handle is to create a set of wrappers around WINAPI to handle various file modifications for deep path files on Windows.

I am currently copying files using a WINAPI call prefixed with "\\? \" As suggested here . After copying the file, I use the file time metadata (created, available, modified) from the source file and set the time in the target file. I have a problem when I try to apply this logic to a readonly file.

This is what I have tried to do so far:

  • Copy the file.
  • Remove the ReadOnly flag from the target using SetFileAttributes after calling GetFileAttributes.
  • GetFileTime (original)
  • SetFileTime (destination) (with original file time)
  • Reapply the readonly flag.

The problem is that the changed file time is updated after reapplying the readonly flag. Is there a way to do this while keeping all the metadata?

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I would try to open the file not for GENERIC_WRITE

, but for FILE_WRITE_ATTRIBUTES

, in order to set the time of the file, and expect the opening to be granted even if the file is read-only.



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