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62 lines
2.0 KiB
62 lines
2.0 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ServiceDescriptor.h"
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#include <array>
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#include <memory>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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ServiceDescriptor::ServiceDescriptor(std::string name, std::string cmd)
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: mName(name), mCommandLine(cmd) {}
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std::optional<std::string> ServiceDescriptor::GetOutput(OutputConsumer* consumer) const {
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if (!IsAvailable()) return "service not available";
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const auto cmd = command();
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int commandExitStatus = 0;
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auto pipeStreamDeleter = [&commandExitStatus](std::FILE* fp) {
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commandExitStatus = pclose(fp);
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};
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std::unique_ptr<std::FILE, decltype(pipeStreamDeleter)> pipeStream(popen(cmd, "r"),
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pipeStreamDeleter);
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if (!pipeStream) {
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return std::string("Failed to execute ") + cmd + ", " + strerror(errno);
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}
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std::array<char, 65536> buffer;
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while (!std::feof(pipeStream.get())) {
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auto readLen = fread(buffer.data(), 1, buffer.size(), pipeStream.get());
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consumer->Write(buffer.data(), readLen);
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}
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pipeStream.reset();
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if (commandExitStatus == 0) {
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return std::nullopt;
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} else if (commandExitStatus < 0) {
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return std::string("Failed when pclose ") + cmd + ", " + strerror(errno);
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} else {
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return std::string("Error when executing ") + cmd +
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", exit code: " + std::to_string(commandExitStatus);
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}
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}
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