System calls that return file descriptors

[Dmitry V. Levin]

On Fri, May 23, 2014 at 06:49:24AM +0400, Dmitry V. Levin wrote:
> On Thu, May 22, 2014 at 08:45:44PM +0530, Zubin Mithra wrote:
> > I've restructured it a bit more, added in dup* calls, please see commit at
> > [1] and sample output at [2].
> > 
> > [1]
> > https://github.com/eQu1NoX/strace/commit/3d471ba8fccc531b8bc33b6467644b2d17ba8cc0
> > [2] https://gist.github.com/eQu1NoX/ccd6e2f9d45e2e0e82f9
> > 
> > > There is a receive call, that allows to forward open file descriptors
> > > between
> > > processes. I do not known, if you call those received fds "socket fds",
> > > since
> > > they could be any (unresolvable) fd -- unless you poke into /proc for more
> > > information.
> > 
> > Could you please give more information on which syscall you are referring
> > to? I couldn't find a syscall that matched your description.
> 
> recvmsg and recvmmsg, decoded using printcmsghdr (see SCM_RIGHTS).
> I suppose it should just use printfd.

I've pushed the fix with a test for it.


-- 
ldv
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 181 bytes
Desc: not available
URL: <http://lists.strace.io/pipermail/strace-devel/attachments/20140530/6ee6aca3/attachment.bin>