Adds a library to parse service info from init_rc files for use in tests.

Bug: 138114550
Test: used in vts_ibase_test
Change-Id: Ibadc2a76d6112b5778d3a282a1e05ffc74511623

init/test_utils/Android.bp

@@ -0,0 +1,27 @@
+cc_library_static {
+    name: "libinit_test_utils",
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Wno-unused-parameter",
+        "-Werror",
+    ],
+    srcs: [
+        "service_utils.cpp",
+    ],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+        "libjsoncpp",
+        "libprotobuf-cpp-lite",
+        "libhidl-gen-utils",
+    ],
+    whole_static_libs: [
+        "libinit",
+        "libpropertyinfoparser",
+    ],
+    static_libs: [
+        "libbase",
+    ],
+    export_include_dirs: ["include"], // for tests
+}

init/test_utils/include/init-test-utils/service_utils.h

@@ -0,0 +1,32 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#pragma once
+
+#include <map>
+#include <set>
+
+#include <android-base/result.h>
+#include <hidl-util/FqInstance.h>
+
+namespace android {
+namespace init {
+
+using ServiceInterfacesMap = std::map<std::string, std::set<android::FqInstance>>;
+android::base::Result<ServiceInterfacesMap> GetOnDeviceServiceInterfacesMap();
+
+}  // namespace init
+}  // namespace android

init/test_utils/service_utils.cpp

@@ -0,0 +1,63 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <string>
+
+#include <android-base/logging.h>
+
+#include "../parser.h"
+#include "../service.h"
+#include "../service_list.h"
+#include "../service_parser.h"
+#include "include/init-test-utils/service_utils.h"
+
+namespace android {
+namespace init {
+
+android::base::Result<ServiceInterfacesMap> GetOnDeviceServiceInterfacesMap() {
+    ServiceList& service_list = ServiceList::GetInstance();
+    Parser parser;
+    parser.AddSectionParser("service",
+                            std::make_unique<ServiceParser>(&service_list, nullptr, std::nullopt));
+    for (const auto& location : {
+                 "/init.rc",
+                 "/system/etc/init",
+                 "/system_ext/etc/init",
+                 "/product/etc/init",
+                 "/odm/etc/init",
+                 "/vendor/etc/init",
+         }) {
+        parser.ParseConfig(location);
+    }
+
+    ServiceInterfacesMap result;
+    for (const auto& service : service_list.services()) {
+        // Create an entry for all services, including services that may not
+        // have any declared interfaces.
+        result[service->name()] = std::set<android::FqInstance>();
+        for (const auto& intf : service->interfaces()) {
+            android::FqInstance fqInstance;
+            if (!fqInstance.setTo(intf)) {
+                return android::base::Error() << "Unable to parse interface: '" << intf << "'";
+            }
+            result[service->name()].insert(fqInstance);
+        }
+    }
+    return result;
+}
+
+}  // namespace init
+}  // namespace android