On Fri, 27 Jun 2014 20:34:42 +0400 Askar Safin <safinaskar@xxxxxxx> wrote: > Why "splice" doesn't splice between two non-pipes? I think such splice would be very useful (not only file-to-socket). For example, for dd, cp, cp -r. Also, it seems, the kernel already supports splice between non-pipes (do_splice_direct function), this function is just not available to userspace. (The patch is just an idea, not tested. I don't know how to actually add this feature.) > > == > Askar Safin > > diff --git a/fs/splice.c b/fs/splice.c > index d37431d..ffb95db 100644 > --- a/fs/splice.c > +++ b/fs/splice.c > @@ -1394,7 +1394,7 @@ static long do_splice(struct file *in, loff_t __user *off_in, > return ret; > } > > - return -EINVAL; > + return do_splice_direct(in, off_in, out, off_out, len, flags); > } > > /* Consider using "sendfile" instead of "splice". NeilBrown
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