1 /*
2 * Copyright (c) 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_log.h"
20 #include "init_param.h"
21 #include "init_service_manager.h"
22 #include "loop_event.h"
23
24 SignalHandle g_sigHandle = NULL;
25
ProcessSignal(const struct signalfd_siginfo * siginfo)26 static void ProcessSignal(const struct signalfd_siginfo *siginfo)
27 {
28 switch (siginfo->ssi_signo) {
29 case SIGCHLD: {
30 pid_t sigPID;
31 int procStat = 0;
32 while (1) {
33 sigPID = waitpid(-1, &procStat, WNOHANG);
34 if (sigPID <= 0) {
35 break;
36 }
37 // check child process exit status
38 if (WIFSIGNALED(procStat)) {
39 INIT_LOGE("Child process %d exit with signal: %d", sigPID, WTERMSIG(procStat));
40 }
41 if (WIFEXITED(procStat)) {
42 INIT_LOGE("Child process %d exit with code : %d", sigPID, WEXITSTATUS(procStat));
43 }
44 INIT_LOGI("SigHandler, SIGCHLD received, sigPID = %d.", sigPID);
45 CheckWaitPid(sigPID);
46 ServiceReap(GetServiceByPid(sigPID));
47 }
48 break;
49 }
50 case SIGTERM: {
51 INIT_LOGI("SigHandler, SIGTERM received.");
52 SystemWriteParam("startup.device.ctl", "stop");
53 // exec reboot use toybox reboot cmd
54 ExecReboot("reboot");
55 break;
56 }
57 default:
58 INIT_LOGI("SigHandler, unsupported signal %d.", siginfo->ssi_signo);
59 break;
60 }
61 }
62
SignalInit(void)63 void SignalInit(void)
64 {
65 if (LE_CreateSignalTask(LE_GetDefaultLoop(), &g_sigHandle, ProcessSignal) != 0) {
66 INIT_LOGW("initialize signal handler failed");
67 return;
68 }
69 if (LE_AddSignal(LE_GetDefaultLoop(), g_sigHandle, SIGCHLD) != 0) {
70 INIT_LOGW("start SIGCHLD handler failed");
71 }
72 if (LE_AddSignal(LE_GetDefaultLoop(), g_sigHandle, SIGTERM) != 0) {
73 INIT_LOGW("start SIGTERM handler failed");
74 }
75 }