1 /*
2 * Copyright (c) 2024 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
16 #include <signal.h>
17 #include <stdbool.h>
18 #include <stdlib.h>
19
20 #include "appspawn_hook.h"
21 #include "appspawn_modulemgr.h"
22 #include "appspawn_manager.h"
23 #include "appspawn_service.h"
24 #include "appspawn_kickdog.h"
25 #include "parameter.h"
26 #include "securec.h"
27
28 #define APPSPAWN_PRELOAD "libappspawn_helper.z.so"
29
30 #ifndef CJAPP_SPAWN
31 static AppSpawnStartArgTemplate g_appSpawnStartArgTemplate[PROCESS_INVALID] = {
32 {APPSPAWN_SERVER_NAME, {MODE_FOR_APP_SPAWN, MODULE_APPSPAWN, APPSPAWN_SOCKET_NAME, APPSPAWN_SERVER_NAME, 1}},
33 {NWEBSPAWN_SERVER_NAME, {MODE_FOR_NWEB_SPAWN, MODULE_NWEBSPAWN, NWEBSPAWN_SOCKET_NAME, NWEBSPAWN_SERVER_NAME, 1}},
34 {"app_cold", {MODE_FOR_APP_COLD_RUN, MODULE_APPSPAWN, APPSPAWN_SOCKET_NAME, APPSPAWN_SERVER_NAME, 0}},
35 {"nweb_cold", {MODE_FOR_NWEB_COLD_RUN, MODULE_NWEBSPAWN, APPSPAWN_SOCKET_NAME, NWEBSPAWN_SERVER_NAME, 0}},
36 {NATIVESPAWN_SERVER_NAME, {MODE_FOR_NATIVE_SPAWN, MODULE_NATIVESPAWN, NATIVESPAWN_SOCKET_NAME,
37 NATIVESPAWN_SERVER_NAME, 1}},
38 {NWEBSPAWN_RESTART, {MODE_FOR_NWEB_SPAWN, MODULE_NWEBSPAWN, NWEBSPAWN_SOCKET_NAME, NWEBSPAWN_SERVER_NAME, 1}},
39 };
40 #else
41 static AppSpawnStartArgTemplate g_appCJSpawnStartArgTemplate[CJPROCESS_INVALID] = {
42 {CJAPPSPAWN_SERVER_NAME, {MODE_FOR_CJAPP_SPAWN, MODULE_APPSPAWN, CJAPPSPAWN_SOCKET_NAME, CJAPPSPAWN_SERVER_NAME,
43 1}},
44 {"app_cold", {MODE_FOR_APP_COLD_RUN, MODULE_APPSPAWN, CJAPPSPAWN_SOCKET_NAME, CJAPPSPAWN_SERVER_NAME, 0}},
45 };
46 #endif
47
CheckPreload(char * const argv[])48 static void CheckPreload(char *const argv[])
49 {
50 char buf[256] = APPSPAWN_PRELOAD; // 256 is enough in most cases
51 char *preload = getenv("LD_PRELOAD");
52 char *pos = preload ? strstr(preload, APPSPAWN_PRELOAD) : NULL;
53 if (pos) {
54 int len = pos - preload;
55 len = sprintf_s(buf, sizeof(buf), "%.*s%s", len, preload, pos + strlen(APPSPAWN_PRELOAD));
56 APPSPAWN_CHECK(len >= 0, return, "preload too long?: %{public}s", preload);
57 if (len == 0) {
58 int ret = unsetenv("LD_PRELOAD");
59 APPSPAWN_CHECK(ret == 0, return, "unsetenv fail(%{public}d)", errno);
60 } else {
61 int ret = setenv("LD_PRELOAD", buf, true);
62 APPSPAWN_CHECK(ret == 0, return, "setenv fail(%{public}d): %{public}s", errno, buf);
63 }
64 return;
65 }
66 if (preload && preload[0]) {
67 int len = sprintf_s(buf, sizeof(buf), "%s:" APPSPAWN_PRELOAD, preload);
68 APPSPAWN_CHECK(len > 0, return, "preload too long: %{public}s", preload);
69 }
70 int ret = setenv("LD_PRELOAD", buf, true);
71 APPSPAWN_CHECK(ret == 0, return, "setenv fail(%{public}d): %{public}s", errno, buf);
72 ssize_t nread = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
73 APPSPAWN_CHECK(nread != -1, return, "readlink fail: /proc/self/exe: %{public}d", errno);
74 buf[nread] = 0;
75 ret = execv(buf, argv);
76 APPSPAWN_LOGE("execv fail: %{public}s: %{public}d: %{public}d", buf, errno, ret);
77 }
78
79 #ifndef NATIVE_SPAWN
GetAppSpawnStartArg(const char * serverName,AppSpawnStartArgTemplate * argTemplate,int count)80 static AppSpawnStartArgTemplate *GetAppSpawnStartArg(const char *serverName, AppSpawnStartArgTemplate *argTemplate,
81 int count)
82 {
83 for (int i = 0; i < count; i++) {
84 if (strcmp(serverName, argTemplate[i].serverName) == 0) {
85 return &argTemplate[i];
86 }
87 }
88
89 return argTemplate;
90 }
91 #endif
92
93 // appspawn -mode appspawn | cold | nwebspawn -param app_property -fd clientFd
main(int argc,char * const argv[])94 int main(int argc, char *const argv[])
95 {
96 APPSPAWN_LOGE("main argc: %{public}d", argc);
97 if (argc <= 0) {
98 return 0;
99 }
100 uintptr_t start = (uintptr_t)argv[0];
101 uintptr_t end = (uintptr_t)strchr(argv[argc - 1], 0);
102 if (end == 0) {
103 return 0;
104 }
105 InitCommonEnv();
106 CheckPreload(argv);
107 (void)signal(SIGPIPE, SIG_IGN);
108 uint32_t argvSize = end - start;
109 AppSpawnStartArg *arg;
110 AppSpawnStartArgTemplate *argTemp = NULL;
111
112 #ifdef CJAPP_SPAWN
113 argTemp = &g_appCJSpawnStartArgTemplate[CJPROCESS_FOR_APP_SPAWN];
114 if (argc > MODE_VALUE_INDEX) {
115 argTemp = GetAppSpawnStartArg(argv[MODE_VALUE_INDEX], g_appCJSpawnStartArgTemplate,
116 ARRAY_LENGTH(g_appCJSpawnStartArgTemplate));
117 }
118 #elif NATIVE_SPAWN
119 argTemp = &g_appSpawnStartArgTemplate[PROCESS_FOR_NATIVE_SPAWN];
120 #else
121 argTemp = &g_appSpawnStartArgTemplate[PROCESS_FOR_APP_SPAWN];
122 if (argc > MODE_VALUE_INDEX) {
123 argTemp = GetAppSpawnStartArg(argv[MODE_VALUE_INDEX], g_appSpawnStartArgTemplate,
124 ARRAY_LENGTH(g_appSpawnStartArgTemplate));
125 }
126 #endif
127 arg = &argTemp->arg;
128 if (arg->initArg == 0) {
129 APPSPAWN_CHECK(argc >= ARG_NULL, return 0, "Invalid arg for cold start %{public}d", argc);
130 } else {
131 if (strcmp(argTemp->serverName, NWEBSPAWN_RESTART) == 0) { // nweb spawn restart
132 APPSPAWN_CHECK_ONLY_EXPER(argvSize >= APP_LEN_PROC_NAME, argvSize = APP_LEN_PROC_NAME);
133 } else {
134 APPSPAWN_CHECK(argvSize >= APP_LEN_PROC_NAME, return 0, "Invalid arg size for service %{public}s",
135 arg->serviceName);
136 }
137 }
138 AppSpawnContent *content = StartSpawnService(arg, argvSize, argc, argv);
139 if (content != NULL) {
140 if ((arg->moduleType == MODULE_APPSPAWN) && (arg->mode != MODE_FOR_APP_COLD_RUN)) {
141 AppSpawnKickDogStart(content);
142 }
143 content->runAppSpawn(content, argc, argv);
144 }
145 return 0;
146 }
147