Re: getsockopt(2)

[David Holland <dholland-tech%netbsd.org@localhost>]

On Mon, Dec 18, 2017 at 07:21:33PM +0000, David Holland wrote:
 > On Thu, Dec 07, 2017 at 03:04:32PM +0000, Robert Swindells wrote:
 >  > I wrote:
 >  >> Does anyone know why we don't use the input 'optlen' parameter to the
 >  >> getsockopt(2) syscall, we do write back to it on return.
 >  >>  [...]
 >  >> 
 >  >> There are also lots of places in sctp_usrreq that want to use it.
 >  >> 
 >  >> I can set it with the following patch (line numbers will be slightly
 >  >> out), but wondered if there was a reason for the current behaviour.
 >  >>  [...]
 >  > 
 >  > Has anyone had any other thoughts on this ?
 >  > 
 >  > I still think that the one line change shown here is correct, it will 
 >  > allocate a buffer that gets filled by the stuff to be copied back to
 >  > userspace.
 > 
 > The man page for getsockopt says [irrelevant stuff]

Oops, I guess I am missing something.

-- 
David A. Holland
dholland%netbsd.org@localhost