Method send

cpp-subprocess/subprocess.hpp:1431–1432

  void set_err_buf_cap(size_t cap) { stream_.set_err_buf_cap(cap); }

  int send(const char* msg, size_t length)
  { return stream_.send(msg, length); }

  int send(const std::string& msg)
  { return send(msg.c_str(), msg.size()); }