Objective c 在类unix串行模式中设置IOCTL\u串行\u设置\u手流

我需要与流量控制装置（也称为RTS/CTS）进行双向通信。我已经配置了termios结构以获得正确的流控制，但无法初始化通信。 我用windows软件嗅探数据包，在win上发送数据包之前还有其他设置：

1 000004: I/O Request (DOWN), 23.01.2015 17:30:53.934 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_QUEUE_SIZE: Set queue size
  InSize=4096
  OutSize=4096
2 000006: I/O Request (DOWN), 23.01.2015 17:30:53.934 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_PURGE: Purge requests
  Purge mask=TXABORT: Read requests, RXABORT: Receive buffer, TXCLEAR: Write requests, RXCLEAR: Write buffer
3 000024: I/O Request (DOWN), 23.01.2015 17:30:53.934 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_BAUD_RATE: Set baud rate
  Baud Rate=1200
4 000030: I/O Request (DOWN), 23.01.2015 17:30:53.940 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_LINE_CONTROL: Set line control
  WordLength=8
  StopBits=1 stop bit
  Parity=Odd parity
5 000032: I/O Request (DOWN), 23.01.2015 17:30:53.942 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_CHARS: Set special characters
  EofChar=0x0
  ErrorChar=0x0
  BreakChar=0x0
  EventChar=0x0
  XonChar=0x11
  XoffChar=0x13
6 000034: I/O Request (DOWN), 23.01.2015 17:30:53.942 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_HANDFLOW: Set handshake information
  ControlHandShake=2147483649
  FlowReplace=0
  XonLimit=2048
  XoffLimit=512
7 000038: I/O Request (DOWN), 23.01.2015 17:30:53.946 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))
  IOCTL_SERIAL_SET_TIMEOUTS: Set timeouts
  ReadIntervalTimeout=0
  ReadTotalTimeoutMultiplier=20
  ReadTotalTimeoutConstant=90
  WriteTotalTimeoutMultiplier=10
  WriteTotalTimeoutConstant=50
  000053: I/O Request (UP), 23.01.2015 17:30:54.343 +0.0 (1. Device: Prolific USB-to-Serial Comm Port (COM1))

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如何在类似*nix的操作系统中模拟这种配置（IOCTL\u SERIAL\u SET\u QUEUE\u SIZE、IOCTL\u SERIAL\u PURGE、IOCTL\u SERIAL\u SET\u HANDFLOW和IOCTL\u SERIAL\u SET\u timeout）？

您看过PERL的设备：：SerialPort吗。它完成了所有这一切，并且有很多很好的文档可以“复制”windows设置。最新版本有purge_tx、purge_rx。初始化后，设置波特率、停止位、奇偶校验和数据位