xref: /base/startup/appspawn/lite/main.c (revision 69570cc8) 
1/*
2 * Copyright (c) 2021-2022 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 <errno.h>
16#include <signal.h>
17#include <sys/types.h>
18#include <sys/wait.h>
19#include <unistd.h>
20
21#include "samgr_lite.h"
22#include "appspawn_server.h"
23#include "appspawn_service.h"
24
25void __attribute__((weak)) HOS_SystemInit(void)
26{
27    SAMGR_Bootstrap();
28    APPSPAWN_LOGI("[appspawn] HOS_SystemInit is called!");
29}
30
31static void SignalHandler(int sig)
32{
33    switch (sig) {
34        case SIGCHLD: {
35            pid_t sigPID;
36            int procStat = 0;
37            while (1) {
38                sigPID = waitpid(-1, &procStat, WNOHANG);
39                if (sigPID <= 0) {
40                    break;
41                }
42                APPSPAWN_LOGE("SignalHandler sigPID %d.", sigPID);
43            }
44            break;
45        }
46        default:
47            break;
48    }
49}
50
51void SignalRegist(void)
52{
53    struct sigaction act;
54    act.sa_handler = SignalHandler;
55    act.sa_flags   = SA_RESTART;
56    if (sigfillset(&act.sa_mask) != 0) {
57        APPSPAWN_LOGE("[appspawn] sigfillset failed! err %d.", errno);
58    }
59
60    if (sigaction(SIGCHLD, &act, NULL) != 0) {
61        APPSPAWN_LOGE("[appspawn] sigaction failed! err %d.", errno);
62    }
63}
64
65int main(int argc, char * const argv[])
66{
67    sleep(1);
68    APPSPAWN_LOGI("[appspawn] main, enter.");
69
70    AppSpawnContent *content = AppSpawnCreateContent(APPSPAWN_SERVICE_NAME, NULL, 0, 0);
71    if (content == NULL) {
72        APPSPAWN_LOGE("Failed to create content for appspawn");
73        return -1;
74    }
75    SetContentFunction(content);
76    // 1. ipc module init
77    HOS_SystemInit();
78
79    // 2. register signal for SIGCHLD
80    SignalRegist();
81
82    // 3. keep process alive
83    APPSPAWN_LOGI("[appspawn] main, entering wait.");
84    while (1) {
85        // pause only returns when a signal was caught and the signal-catching function returned.
86        // pause only returns -1, no need to process the return value.
87        (void)pause();
88    }
89}
90