1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* 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.
*/
#define LOG_TAG "derive_sdk"
#include <algorithm>
#include <dirent.h>
#include <iostream>
#include <sys/stat.h>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include "frameworks/base/apex/sdkext/derive_sdk/sdk.pb.h"
using com::android::sdkext::proto::SdkVersion;
int main(int, char**) {
std::unique_ptr<DIR, decltype(&closedir)> apex(opendir("/apex"), closedir);
if (!apex) {
LOG(ERROR) << "Could not read /apex";
return EXIT_FAILURE;
}
struct dirent* de;
std::vector<std::string> paths;
while ((de = readdir(apex.get()))) {
std::string name = de->d_name;
if (name[0] == '.' || name.find('@') != std::string::npos) {
// Skip <name>@<ver> dirs, as they are bind-mounted to <name>
continue;
}
std::string path = "/apex/" + name + "/etc/sdkinfo.binarypb";
struct stat statbuf;
if (stat(path.c_str(), &statbuf) == 0) {
paths.push_back(path);
}
}
std::vector<int> versions;
for (const auto& path : paths) {
std::string contents;
if (!android::base::ReadFileToString(path, &contents, true)) {
LOG(ERROR) << "failed to read " << path;
continue;
}
SdkVersion sdk_version;
if (!sdk_version.ParseFromString(contents)) {
LOG(ERROR) << "failed to parse " << path;
continue;
}
LOG(INFO) << "Read version " << sdk_version.version() << " from " << path;
versions.push_back(sdk_version.version());
}
auto itr = std::min_element(versions.begin(), versions.end());
std::string prop_value = itr == versions.end() ? "0" : std::to_string(*itr);
if (!android::base::SetProperty("ro.build.version.extensions.r", prop_value)) {
LOG(ERROR) << "failed to set sdk_info prop";
return EXIT_FAILURE;
}
LOG(INFO) << "R extension version is " << prop_value;
return EXIT_SUCCESS;
}
|
