1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #define LOG_TAG "libapexutil"
17
18 #include "apexutil.h"
19
20 #include <dirent.h>
21
22 #include <memory>
23
24 #include <android-base/file.h>
25 #include <android-base/logging.h>
26 #include <android-base/result.h>
27 #include <apex_manifest.pb.h>
28
29 using ::android::base::Error;
30 using ::android::base::ReadFileToString;
31 using ::android::base::Result;
32 using ::apex::proto::ApexManifest;
33
34 namespace {
35
ParseApexManifest(const std::string & manifest_path)36 Result<ApexManifest> ParseApexManifest(const std::string &manifest_path) {
37 std::string content;
38 if (!ReadFileToString(manifest_path, &content)) {
39 return Error() << "Failed to read manifest file: " << manifest_path;
40 }
41 ApexManifest manifest;
42 if (!manifest.ParseFromString(content)) {
43 return Error() << "Can't parse APEX manifest: " << manifest_path;
44 }
45 return manifest;
46 }
47
48 } // namespace
49
50 namespace android {
51 namespace apex {
52
53 std::map<std::string, ApexManifest>
GetActivePackages(const std::string & apex_root)54 GetActivePackages(const std::string &apex_root) {
55 std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(apex_root.c_str()),
56 closedir);
57 if (!dir) {
58 return {};
59 }
60
61 std::map<std::string, ApexManifest> apexes;
62 dirent *entry;
63 while ((entry = readdir(dir.get())) != nullptr) {
64 if (entry->d_name[0] == '.')
65 continue;
66 if (entry->d_type != DT_DIR)
67 continue;
68 if (strchr(entry->d_name, '@') != nullptr)
69 continue;
70 std::string apex_path = apex_root + "/" + entry->d_name;
71 auto manifest = ParseApexManifest(apex_path + "/apex_manifest.pb");
72 if (manifest.ok()) {
73 apexes.emplace(std::move(apex_path), std::move(*manifest));
74 } else {
75 LOG(WARNING) << manifest.error();
76 }
77 }
78 return apexes;
79 }
80
81 } // namespace apex
82 } // namespace android
83