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    SubjectRE: OT: why no file copy() libc/syscall ??
    (Among the other N objections, add things like the lack of any sort of
    control or option parameters)
    N += 1: Sparse Copying (e.g. seeking past blocks of zeros)
    N += 1: Unlink or overwrite or what?
    N += 1: In-Kernel locking and resolution for pages that are mandatory
    N += 1: No fine-grained control for concurrency issues (multiple writers)

    Start with doing a cp --help and move on from there for an unbounded list of
    issues that sys_copy(int fd1, int fd2) does not even come close to

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