Method wait

src/python/subprocess.cpp:110–128

    }

    int SubProcess::wait() {
        if (pid_ <= 0)
            return exit_code_;

        if (stdout_fd_ >= 0) {
            close(stdout_fd_);
            stdout_fd_ = -1;
        }

        int status;
        if (waitpid(pid_, &status, 0) == pid_) {
            if (WIFEXITED(status))
                exit_code_ = WEXITSTATUS(status);
            else if (WIFSIGNALED(status))
                exit_code_ = 128 + WTERMSIG(status);
        }
        pid_ = -1;
        return exit_code_;
    }

#else // Windows