Svante Signell, on Mon 14 Mar 2016 09:05:56 +0100, wrote: > On Mon, 2016-03-14 at 00:57 +0100, Samuel Thibault wrote: > > Svante Signell, on Sun 13 Mar 2016 14:19:35 +0100, wrote: > > > Running the code reveals that the current implementation in glibc is > > > buggy: > > > > > > ./scm_rights+creds_recv > > > Number of SCM_RIGHTS [<=3], SCM_CREDS [<=2]: [1,1] > > > Input error: Using defaults: > > > NRIGHTS = 1, NCREDS = 1 > > > scm_rights+creds_send.c: msgh.msg_controllen = 112 (from control_un) > > > Receiving via datagram socket > > > recvmsg: (os/kern) invalid right > > > > I've had a closer look, what happens here is that the > > mach_port_mod_refs() call on the rendezvous port fails because the port > > type of the rendezvous port is DEADNAME, i.e. the other end dropped the > > port. Indeed, your sending program terminates as soon as it has sent > > its message. You need to make it wait at least a bit for the receiver > > to get to receive the credentials. > > Well, the program works perfectly on kFreeBSD (Linux is different).
That doesn't mean that the program behaves correctly. > And with my old implementation it worked perfectly too. Because it was synchronous, which was posing other problems. Samuel
