/*
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* Copyright (C) 2018 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 "adb.h"
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#include "adb_io.h"
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#include "adb_unique_fd.h"
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#include "adb_utils.h"
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#include "shell_service.h"
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#include <android-base/cmsg.h>
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namespace {
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struct AbbProcess;
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static auto& abbp = *new std::unique_ptr<AbbProcess>(std::make_unique<AbbProcess>());
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struct AbbProcess {
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unique_fd sendCommand(std::string_view command);
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private:
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static unique_fd startAbbProcess(unique_fd* error_fd);
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static constexpr auto kRetries = 2;
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static constexpr auto kErrorProtocol = SubprocessProtocol::kShell;
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std::mutex locker_;
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unique_fd socket_fd_;
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};
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unique_fd AbbProcess::sendCommand(std::string_view command) {
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std::unique_lock lock{locker_};
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for (int i = 0; i < kRetries; ++i) {
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unique_fd error_fd;
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if (socket_fd_ == -1) {
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socket_fd_ = startAbbProcess(&error_fd);
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}
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if (socket_fd_ == -1) {
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LOG(ERROR) << "failed to start abb process";
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return error_fd;
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}
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if (!SendProtocolString(socket_fd_, std::string(command))) {
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PLOG(ERROR) << "failed to send command to abb";
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socket_fd_.reset();
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continue;
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}
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unique_fd fd;
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std::string error;
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char buf;
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if (android::base::ReceiveFileDescriptors(socket_fd_, &buf, 1, &fd) != 1) {
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PLOG(ERROR) << "failed to receive FD from abb";
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socket_fd_.reset();
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continue;
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}
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return fd;
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}
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LOG(ERROR) << "abb is unavailable";
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socket_fd_.reset();
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return ReportError(kErrorProtocol, "abb is unavailable");
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}
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unique_fd AbbProcess::startAbbProcess(unique_fd* error_fd) {
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constexpr auto abb_process_type = SubprocessType::kRaw;
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constexpr auto abb_protocol = SubprocessProtocol::kNone;
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constexpr auto make_pty_raw = false;
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return StartSubprocess("abb", "dumb", abb_process_type, abb_protocol, make_pty_raw,
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kErrorProtocol, error_fd);
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}
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} // namespace
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unique_fd execute_abb_command(std::string_view command) {
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return abbp->sendCommand(command);
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}
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