使用层级接口加载param

Signed-off-by: Nzhr758 <zhanghaoran@huawei.com>

services/BUILD.gn

@@ -123,6 +123,7 @@ if (defined(ohos_lite)) {
     sources += init_common_sources
 
     include_dirs = [
+      "//base/customization/config_policy/interfaces/innerkits/include",
       "//base/security/access_token/interfaces/innerkits/token_setproc/include",
       "//base/security/access_token/interfaces/innerkits/nativetoken/include",
       "//base/startup/init_lite/interfaces/innerkits/sandbox/include",
@@ -139,6 +140,7 @@ if (defined(ohos_lite)) {
       "//third_party/bounds_checking_function/include",
     ]
     deps = [
+      "//base/customization/config_policy/frameworks/config_policy:configpolicy_util_for_init_static",
       "//base/security/access_token/interfaces/innerkits/nativetoken:libnativetoken",
       "//base/security/access_token/interfaces/innerkits/token_setproc:libtoken_setproc",
       "//base/startup/init_lite/interfaces/innerkits:libfsmanager_static",

services/init/standard/init.c

@@ -23,6 +23,8 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <linux/major.h>
+
+#include "config_policy_utils.h"
 #include "device.h"
 #include "fd_holder_service.h"
 #include "fs_manager/fs_manager.h"
@@ -289,23 +291,38 @@ static void IsEnableSandbox(void)
     }
 }
 
+// Init provide this function for static lib link
+__attribute__((weak)) int SystemGetParameter(const char *name, char *value, unsigned int *len)
+{
+    return SystemReadParam(name, value, len);
+}
+
+static void InitLoadParamFiles(void)
+{
+    // Load const params, these can't be override!
+    LoadDefaultParams("/system/etc/param/ohos_const", LOAD_PARAM_NORMAL);
+    CfgFiles *files = GetCfgFiles("etc/param");
+    for (int i = MAX_CFG_POLICY_DIRS_CNT - 1; files && i >= 0; i--) {
+        if (files->paths[i]) {
+            LoadDefaultParams(files->paths[i], LOAD_PARAM_ONLY_ADD);
+        }
+    }
+    FreeCfgFiles(files);
+}
+
 void SystemConfig(void)
 {
     InitServiceSpace();
+    InitParamService();
     InitParseGroupCfg();
     PluginManagerInit();
-
-    InitParamService();
     RegisterBootStateChange(BootStateChange);
 
     // load SELinux context and policy
     // Do not move position!
     SystemLoadSelinux();
-
     // parse parameters
-    LoadDefaultParams("/system/etc/param/ohos_const", LOAD_PARAM_NORMAL);
-    LoadDefaultParams("/vendor/etc/param", LOAD_PARAM_NORMAL);
-    LoadDefaultParams("/system/etc/param", LOAD_PARAM_ONLY_ADD);
+    InitLoadParamFiles();
     // read config
     ReadConfig();
     INIT_LOGI("Parse init config file done.");

test/unittest/BUILD.gn

@@ -134,6 +134,7 @@ ohos_unittest("init_ut") {
   configs = [ "//base/startup/init_lite/test/unittest:utest_config" ]
 
   include_dirs = [
+    "//base/customization/config_policy/interfaces/innerkits/include",
     "//base/startup/init_lite/services/init/standard",
     "//base/startup/init_lite/interfaces/innerkits/include",
     "//base/startup/init_lite/interfaces/innerkits/fd_holder",
@@ -174,6 +175,7 @@ ohos_unittest("init_ut") {
   ]
 
   deps = [
+    "//base/customization/config_policy/frameworks/config_policy:configpolicy_util_for_init_static",
     "//base/security/access_token/interfaces/innerkits/nativetoken:libnativetoken",
     "//base/security/access_token/interfaces/innerkits/token_setproc:libtoken_setproc",
     "//base/startup/syspara_lite/interfaces/innerkits/native/syspara:syspara",