MSG_CMSG_CLOFORK - FreeBSD

Symbol: MSG_CMSG_CLOFORK

sys/kern/uipc_usrreq.c

((flags & MSG_CMSG_CLOFORK) ? O_CLOFORK : 0);

tests/sys/kern/unix_passfd_test.c

recvfd(fd[1], &getfd, MSG_CMSG_CLOFORK);