Re: New copyfile system call - discuss before LSF?

From: Paolo Bonzini
Date: Fri Feb 22 2013 - 04:48:59 EST

Il 21/02/2013 23:24, Zach Brown ha scritto:
> You could make it work with some locking and out_fd seeking to set the
> write offset before calling sendfile64()+flags, but ugh.
> ssize_t sendfile(int out_fd, int in_fd, off_t in_offset, off_t
> out_offset, size_t count, int flags);
> That seems closer.
> We might also want to pre-emptively offer iovs instead of offsets,
> because that's the very first thing that's going to be requested after
> people prototype having to iterate calling sendfile() for each
> contiguous copy region.

Indeed, I was about to propose that exactly. So that would be
psendfilev. I don't think psendfile is useful, and can be easily
provided at the libc level.

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