private:

// child process ID

int child_pid_ = -1;

// pipes to child process's stdout/stderr

int stdout_fd_ = -1;

int stderr_fd_ = -1;

// process exited

bool exited_ = false;

// exit code -- will be initialized by close()

int exit_code_ = -1;

// these constants help make the pipe code more readable

static constexpr int READ_END_ = 0, WRITE_END_ = 1;

public:

/**

process(std::initializer_list<std::string> args);

/**

process(std::initializer_list<std::string> args, const subprocess_env_map_t& env);

/**

process(const std::vector<std::string>& args);

/**

process(const std::vector<std::string>& args, const subprocess_env_map_t& env);

~process();

/**

int pid() const;

/**

int stdout_fd() const;

/**

int stderr_fd() const;

/**

int close();

/**

void kill(int signal = SIGTERM) const;

/**

bool is_running();