1 /*
2 * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include <signal.h>
16 #include <sys/wait.h>
17
18 #include "init_adapter.h"
19 #include "init_service_manager.h"
20
ReapService(Service * service)21 void ReapService(Service *service)
22 {
23 if (service == NULL) {
24 return;
25 }
26 if (service->attribute & SERVICE_ATTR_IMPORTANT) {
27 // important process exit, need to reboot system
28 service->pid = -1;
29 StopAllServices(0, NULL, 0, NULL);
30 RebootSystem();
31 }
32 ServiceReap(service);
33 }
34
SigHandler(int sig)35 static void SigHandler(int sig)
36 {
37 switch (sig) {
38 case SIGCHLD: {
39 pid_t sigPID;
40 int procStat = 0;
41 while (1) {
42 sigPID = waitpid(-1, &procStat, WNOHANG);
43 if (sigPID <= 0) {
44 break;
45 }
46 CheckWaitPid(sigPID);
47 ReapService(GetServiceByPid(sigPID));
48 }
49 break;
50 }
51 case SIGTERM: {
52 StopAllServices(0, NULL, 0, NULL);
53 break;
54 }
55 default:
56 break;
57 }
58 }
59
SignalInit(void)60 void SignalInit(void)
61 {
62 struct sigaction act;
63 act.sa_handler = SigHandler;
64 act.sa_flags = SA_RESTART;
65 (void)sigfillset(&act.sa_mask);
66
67 sigaction(SIGCHLD, &act, NULL);
68 sigaction(SIGTERM, &act, NULL);
69 }