带有 {serial} 的 ttyUSB udev 规则不起作用

带有 {serial} 的 ttyUSB udev 规则不起作用

我正在使用 Ubuntu 17.10 和 tty-to-USB 适配器(将来会添加更多),因此打算为该适配器创建一个唯一的 udev 标识符。

我做到了系统盘

Bus 007 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port

udevadm 信息 -a -n /dev/ttyUSB0 | grep '{serial}' | head -n1导致

ATTRS{serial}=="**0000:00:16.0**"

因此我这样做了sudo vi /etc/udev/rules.d/99-usb-serial.rules

SUBSYSTEM=="tty", ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", ATTRS{serial}=="0000:00:16.0", SYMLINK+="ttyUSBComfoAir"

之后sudo udevadm 控制 --reload-rules && sudo udevadm 触发器我期望一些 /dev/ttyUSB....,但是ll /dev/ttyUSB*导致

crw-rw---- 1 root dialout 188, 0 Nov 20 18:04 /dev/ttyUSB0

仅当我省略ATTRS{序列号}有用.....

有什么想法吗??——因为添加更多这些适配器将需要序列号来区分适配器......

你好!由于我不太清楚相关部分是什么:我正在添加完整的输出......

  looking at device '/devices/pci0000:00/0000:00:16.0/usb7/7-1/7-1:1.0/ttyUSB0/tty/ttyUSB0':
    KERNEL=="ttyUSB0"
    SUBSYSTEM=="tty"
    DRIVER==""

  looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7/7-1/7-1:1.0/ttyUSB0':
    KERNELS=="ttyUSB0"
    SUBSYSTEMS=="usb-serial"
    DRIVERS=="pl2303"
    ATTRS{port_number}=="0"

  looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7/7-1/7-1:1.0':
    KERNELS=="7-1:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="pl2303"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="ff"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="00"
    ATTRS{bInterfaceSubClass}=="00"
    ATTRS{bNumEndpoints}=="03"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7/7-1':
    KERNELS=="7-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0400"
    ATTRS{bmAttributes}=="80"
    ATTRS{busnum}=="7"
    ATTRS{configuration}==""
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="2303"
    ATTRS{idVendor}=="067b"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Prolific Technology Inc. "
    ATTRS{maxchild}=="0"
    ATTRS{product}=="USB-Serial Controller D"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{speed}=="12"
    ATTRS{urbnum}=="258959"
    ATTRS{version}==" 1.10"

  looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7':
    KERNELS=="usb7"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0413"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="7"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0001"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 4.13.0-16-generic ohci_hcd"
    ATTRS{maxchild}=="4"
    ATTRS{product}=="OHCI PCI host controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="0000:00:16.0"
    ATTRS{speed}=="12"
    ATTRS{urbnum}=="36"
    ATTRS{version}==" 1.10"

  looking at parent device '/devices/pci0000:00/0000:00:16.0':
    KERNELS=="0000:00:16.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="ohci-pci"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x0c0310"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{d3cold_allowed}=="0"
    ATTRS{device}=="0x4397"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="1"
    ATTRS{irq}=="18"
    ATTRS{local_cpulist}=="0-1"
    ATTRS{local_cpus}=="3"
    ATTRS{msi_bus}=="1"
    ATTRS{numa_node}=="-1"
    ATTRS{revision}=="0x00"
    ATTRS{subsystem_device}=="0x8496"
    ATTRS{subsystem_vendor}=="0x1043"
    ATTRS{vendor}=="0x1002"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

答案1

据我所知,你只能将一个特定孩子的信息与父母的信息结合起来。在你的行中

SUBSYSTEM=="tty", ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", ATTRS{serial}=="0000:00:16.0", SYMLINK+="ttyUSBComfoAir"

你结合这个孩子的信息

looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7/7-1':

还有这个孩子

looking at parent device '/devices/pci0000:00/0000:00:16.0/usb7':`

如果您看前者,则没有包含 ATTRS(serial),如果您看后者,则没有包含 ATTRS(idVendor/idProduct)。

答案2

  • Udev 规则不支持来自多个父节点的混合条件。

    1. 叶/目标节点:SUBSYSTEM=="tty"
    2. 父节点:ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303"
    3. 另一个父节点:ATTRS{serial}=="0000:00:16.0"
  • 这是许多没有串行的 rs232 适配器的已知问题。通常,用户为特定适配器选择固定的 USB 端口,并为该特定端口设置 udev 规则。

  • 其他选项,一些 PL2303 芯片可以使用自定义序列甚至 vid/pid 进行重新编程。工具是免费提供的,但它需要一个适配器,为芯片提供 6.5v 的编程电压(正常模式为 5v)。

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