Direct I/O support (patches included)

Linda Walsh rsync at
Tue Feb 19 13:42:29 MST 2013

In thinking about this some more, you probably
want to limit your O_DIRECT to just opens on files --
not sockets.

I think that might be the cause of the error I got.

The other stuff may still apply, but may be OS dependent.

It doesn't look like it is real easy to tell in the
open routine where the O_DIRECT flag is now (w/your patch)
if we are operating on a file or on a socket.


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