| // Copyright 2023 Google Inc. All Rights Reserved. |
| // |
| // 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 "ipc_utils.h" |
| |
| #include "util.h" |
| |
| #ifndef _WIN32 |
| #include <sys/signal.h> |
| #include <unistd.h> |
| #endif |
| |
| RemoteArguments::RemoteArguments(int argc, char** argv) { |
| if (argc > 0) { |
| args_.reserve(static_cast<size_t>(argc)); |
| for (int n = 0; n < argc; ++n) { |
| args_.push_back(argv[n]); |
| } |
| } |
| } |
| |
| void RemoteArguments::Reset(const std::vector<std::string>& args) { |
| args_ = args; |
| } |
| |
| char** RemoteArguments::argv() const { |
| if (args_.empty()) |
| return nullptr; |
| |
| argv_.clear(); |
| argv_.reserve(args_.size()); |
| for (const auto& arg : args_) |
| argv_.push_back(const_cast<char*>(arg.data())); |
| return argv_.data(); |
| } |
| |
| void RemoteArguments::InsertAt(size_t pos, std::string arg) { |
| if (pos > args_.size()) |
| pos = args_.size(); |
| args_.insert(args_.begin() + pos, std::move(arg)); |
| } |
| |
| template <> |
| bool RemoteWrite<std::string>(const std::string& obj, IpcHandle& con, |
| std::string* error) { |
| size_t size = obj.size(); |
| return RemoteWrite(size, con, error) && |
| con.WriteFull(obj.data(), size, error); |
| } |
| |
| template <> |
| bool RemoteWrite<RemoteArguments>(const RemoteArguments& obj, IpcHandle& con, |
| std::string* error) { |
| size_t size = obj.args().size(); |
| if (!RemoteWrite(size, con, error)) |
| return false; |
| for (const auto& arg : obj.args()) { |
| if (!RemoteWrite(arg, con, error)) |
| return false; |
| } |
| return true; |
| } |
| |
| template <> |
| bool RemoteRead<std::string>(std::string& obj, IpcHandle& con, |
| std::string* error) { |
| size_t size; |
| if (!RemoteRead(size, con, error)) |
| return false; |
| obj.resize(size); |
| if (!size) |
| return true; |
| return con.ReadFull(const_cast<char*>(obj.data()), size, error); |
| } |
| |
| template <> |
| bool RemoteRead<RemoteArguments>(RemoteArguments& obj, IpcHandle& con, |
| std::string* error) { |
| size_t size; |
| if (!RemoteRead(size, con, error)) |
| return false; |
| std::vector<std::string> vec; |
| vec.resize(size); |
| for (auto& arg : vec) { |
| if (!RemoteRead(arg, con, error)) |
| return false; |
| } |
| obj.Reset(std::move(vec)); |
| return true; |
| } |
| |
| void WireEncoder::Write(const void* buffer, size_t size) { |
| result_.append(static_cast<const char*>(buffer), size); |
| } |
| |
| void WireEncoder::Write(const std::string& str) { |
| Write(static_cast<uint32_t>(str.size())); |
| Write(str.data(), str.size()); |
| } |
| |
| WireDecoder::WireDecoder(const void* buffer, size_t size) |
| : p_(static_cast<const char*>(buffer)), end_(p_ + size) {} |
| |
| WireDecoder::WireDecoder(const std::string& str) |
| : WireDecoder(str.data(), str.size()) {} |
| |
| void WireDecoder::Read(void* buffer, size_t size) { |
| if (p_ + size <= end_) { |
| ::memcpy(buffer, p_, size); |
| p_ += size; |
| } else { |
| // To avoid relying on un-initialized memory at runtime |
| // if the client fails to check for errors. |
| ::memset(buffer, '\0', size); |
| p_ = end_; |
| has_error_ = true; |
| } |
| } |
| |
| void WireDecoder::Read(std::string& str) { |
| uint32_t size = 0; |
| Read(size); |
| std::string result; |
| if (size) { |
| result.resize(size); |
| Read(const_cast<char*>(result.data()), result.size()); |
| } |
| str = std::move(result); |
| } |
| |
| #ifndef _WIN32 |
| SigPipeBlocker::SigPipeBlocker() { |
| struct sigaction action = {}; |
| action.sa_handler = SIG_IGN; |
| if (sigaction(SIGPIPE, &action, &prev_action_) < 0) |
| ErrnoFatal("sigaction"); |
| } |
| |
| SigPipeBlocker::~SigPipeBlocker() { |
| if (sigaction(SIGPIPE, &prev_action_, nullptr) < 0) |
| ErrnoFatal("sigaction"); |
| } |
| #endif // !_WIN32 |