SHM_R
id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R);
id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R);
daemon->shm_info->id_ctl = shmget(daemon->shm_info->key, sizeof(int), SHM_R);
daemon->shm_info->id_arr = shmget(daemon->shm_info->key + 1, sizeof(int), SHM_R);