bool WriteToFile()

in util/process_wrapper/system_posix.cc [64:98]

• 33 lines of code
• 7 McCabe index (conditional complexity)

  bool WriteToFile(const System::StrType &stdout_file) {
    CloseWriteEnd();

    constexpr size_t kBufferSize = 4096;
    char buffer[kBufferSize];
    int output_file_desc =
        open(stdout_file.c_str(), O_WRONLY | O_CREAT | O_TRUNC,
             S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
    if (output_file_desc == -1) {
      std::cerr << "process wrapper error: failed to open redirection file: "
                << std::strerror(errno) << ".\n";
      return false;
    }
    while (1) {
      ssize_t read_bytes = read(ReadEndDesc(), buffer, kBufferSize);
      if (read_bytes < 0) {
        std::cerr
            << "process wrapper error: failed to read child process output: "
            << std::strerror(errno) << ".\n";
        return false;
      } else if (read_bytes == 0) {
        break;
      }
      ssize_t written_bytes = write(output_file_desc, buffer, read_bytes);
      if (written_bytes < 0 || written_bytes != read_bytes) {
        std::cerr << "process wrapper error: failed to write to ouput file: "
                  << std::strerror(errno) << ".\n";
        return false;
      }
    }

    CloseReadEnd();
    close(output_file_desc);
    return true;
  }