Jens Axboe wrote:
On Fri, Mar 31 2006, Linus Torvalds wrote:
On Fri, 31 Mar 2006, Jens Axboe wrote:
ssize_t psplice(int fdin, int fdout, size_t len, off_t ofs, unsigned flags);
I definitely see some valid reasons for adding a file offset instead of
using ->f_pos, I'll leave that decision up to Linus though. Linus?
I think a file offset is fine, the one thing holding me back was just the
interface. One file offset per fd? Or just have the rule that the file
offset is for the "non-pipe" device?
Intuitively, I'd expect the offset to be tied to the non-pipe if I were
to eg see this for the first time. So my vote would go for that.
Eee! That means that splice(file_fd, pipe_fd, 1000) and splice(pipe_fd,
file_fd, 1000) have different semantics. It also would seem to prevent
ever implementing direct file-to-file splicing.
--Andy
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