439   struct msghdr msg;  in __msgread()  local
448   msg.msg_iov = &iov;  in __msgread()
449   msg.msg_iovlen = 1;  in __msgread()
450   msg.msg_name = NULL;  in __msgread()
451   msg.msg_namelen = 0;  in __msgread()
453   msg.msg_control = (caddr_t) &cm;  in __msgread()
454   msg.msg_controllen = CMSG_SPACE(sizeof (struct ucred));  in __msgread()
456   msg.msg_flags = 0;  in __msgread()
467   len = __recvmsg (sock, &msg, 0);  in __msgread()
470       if (msg.msg_flags & MSG_CTRUNC || len == 0)  in __msgread()
489   struct msghdr msg;  in __msgwrite()
509   msg.msg_iov = &iov;  in __msgwrite()
510   msg.msg_iovlen = 1;  in __msgwrite()
511   msg.msg_name = NULL;  in __msgwrite()
512   msg.msg_namelen = 0;  in __msgwrite()
513   msg.msg_control = cmsg;  in __msgwrite()
514   msg.msg_controllen = CMSG_ALIGN(cmsg->cmsg_len);  in __msgwrite()
515   msg.msg_flags = 0;  in __msgwrite()
518   len = __sendmsg (sock, &msg, 0);  in __msgwrite()