+ id = ret;
+
+ sops[0].sem_num = 0;
+ sops[0].sem_op = 0;
+ sops[0].sem_flg = SEM_UNDO | IPC_NOWAIT;
+
+ sops[1].sem_num = 0;
+ sops[1].sem_op = 1;
+ sops[1].sem_flg = SEM_UNDO | IPC_NOWAIT;
+
+ sops[2].sem_num = 1;
+ sops[2].sem_op = 0;
+ sops[2].sem_flg = SEM_UNDO | IPC_NOWAIT;
+
+ sops[3].sem_num = 1;
+ sops[3].sem_op = 1;
+ sops[3].sem_flg = SEM_UNDO | IPC_NOWAIT;
+
+ return do_semop(id, sops, 4);
+}
+
+int get_dss_pid(char *config_file, pid_t *pid)
+{
+ int ret, semid;
+ key_t key = get_key_or_die(config_file);
+
+ if (pid)
+ *pid = 0;
+ ret = mutex_get(key, 0);
+ if (ret < 0)
+ return ret == -ERRNO_TO_DSS_ERROR(ENOENT)? -E_NOT_RUNNING : ret;
+ semid = ret;
+ ret = semctl(semid, 1, GETPID);
+ if (ret < 0)
+ return -E_NOT_RUNNING;
+ if (pid)
+ *pid = ret;
+ return mutex_is_locked(semid)? 1 : -E_NOT_RUNNING;