没有这样的文件或目录c++boost库

我无法打开串行端口 以下是代码:

void openport(const string & path)
{
     boost::system::error_code error;
     boost::asio::io_service io;
     boost::asio::serial_port port(io);
     port.open(path, error);
     if(ec)
     {
          cout << "failed" << ", e=" << ec.message().c_str() << endl;
     }
}
int main()
{
openport("ttyUSB0");
return 0;
}

运行程序后,终端出现错误: failed, e=No such file or directory

我通过cout在openport函数中检查变量路径是否正确

当我把dmesg | grep ttyUSB放进去时,我得到了:

[11018.593665] usb 1-1.5: FTDI USB Serial Device converter now attached to ttyUSB0
[15414.150404] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[15423.084984] usb 1-1.5: FTDI USB Serial Device converter now attached to ttyUSB0

有人知道怎么修吗?