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