IPC_PRIVATE       331 os/unix/ngx_freebsd_rfork_thread.c     m->semid = semget(IPC_PRIVATE, 1, SEM_R|SEM_A);
IPC_PRIVATE        91 os/unix/ngx_shmem.c     id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT));