1 /*
2 * Copyright (C) 2022 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
17 #include "nettestutils/DumpService.h"
18
19 #include <android-base/file.h>
20
21 #include <sstream>
22 #include <thread>
23
dumpService(const android::sp<android::IBinder> & binder,const std::vector<std::string> & args,std::vector<std::string> & outputLines)24 android::status_t dumpService(const android::sp<android::IBinder>& binder,
25 const std::vector<std::string>& args,
26 std::vector<std::string>& outputLines) {
27 if (!outputLines.empty()) return -EUCLEAN;
28
29 android::base::unique_fd localFd, remoteFd;
30 if (!Pipe(&localFd, &remoteFd)) return -errno;
31
32 android::Vector<android::String16> str16Args;
33 for (const auto& arg : args) {
34 str16Args.push(android::String16(arg.c_str()));
35 }
36 android::status_t ret;
37 // dump() blocks until another thread has consumed all its output.
38 std::thread dumpThread =
39 std::thread([&ret, binder, remoteFd{std::move(remoteFd)}, str16Args]() {
40 ret = binder->dump(remoteFd, str16Args);
41 });
42
43 std::string dumpContent;
44 if (!android::base::ReadFdToString(localFd.get(), &dumpContent)) {
45 return -errno;
46 }
47 dumpThread.join();
48 if (ret != android::OK) return ret;
49
50 std::stringstream dumpStream(std::move(dumpContent));
51 std::string line;
52 while (std::getline(dumpStream, line)) {
53 outputLines.push_back(line);
54 }
55
56 return android::OK;
57 }
58