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Manuel Bouyer <bouyer@antioche.eu.org> wrote:

> On Mon, Jul 07, 2003 at 03:55:55PM -0500, Douglas G. Phillips wrote:
> > Is there an equivalent to the linux sendfile() in NetBSD?
> 
> There isn't. However, -current has a zero-copy TCP path for write(),
> so mmap()ing the file and write()ing it in large chunks would probably
> to the same.

mmap() can cause SIGSEGV or SIGBUS for various reasons. IIRC, sendfile()
won't cause a crash but return an error code instead. Recovering from
a SIGSEGV/SIGBUS is somewhat ugly. I think you can prevent this by
using mlock/munlock() but these need root privileges on some operating
systems and I don't know what's their effect on performance.

-- 
Christian

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