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SubjectRe: Is sendfile all that sexy?
Thus spake Albert D. Cahalan (
> Rather than combining open() with sendfile(), it could be combined
> with stat(). Since the syscall would be new anyway, it could skip
> the normal requirement about returning the next free file descriptor
> in favor of returning whatever can be most quickly found.

I don't know how Linux does it, but returning the first free file
descriptor can be implemented as O(1) operation.

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