Linux 如何知道哪个设备连接在哪个 /dev/ttyUSB 端口
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How to know which device is connected in which /dev/ttyUSB port
提问by Mayur
I am using two Wavecom 16-port modems. When I attach the modems to my system, I am able to list of all the /dev/ttyUSBport names, but also I want to know, which modem is containing ports 0 to 16 and which one is containing ports 17 to 32?
我正在使用两个 Wavecom 16 端口调制解调器。当我将调制解调器连接到我的系统时，我能够列出所有/dev/ttyUSB端口名称，但我也想知道哪个调制解调器包含端口 0 到 16，哪个包含端口 17 到 32？
The modems may be attached and removed many times in a single day, so I also want to keep logs when modems get disconnected and connected again.
调制解调器可能会在一天内多次连接和移除，因此我还想在调制解调器断开连接并再次连接时保留日志。
Any idea how to do so using c/c++/php script/node.js ?
知道如何使用 c/c++/php script/node.js 这样做吗？
采纳答案by rodrigo
You can get this information from the sysfilesystem. It is easy to check from the shell, and then do a program that does the same:
您可以从sys文件系统中获取此信息。很容易从 shell 中检查，然后做一个程序来做同样的事情：
cd /sys/devices- Find the directory of the first of your ports:
find -name "ttyUSB0". It will probably find them in something like./pci0000:00/0000:00:1d.0/usb2/2-2/2-2.1/2-2.1:1.0/... The
pci*part is the USB controller. The interesting bit is the2-2.1which is the USB device. In that directory there are a lot of files that identify your device:serial: The serial number. Probably what you want.idVendorandidProduct: The USB identifier of the device.
cd /sys/devices- 找到第一个端口的目录：
find -name "ttyUSB0". 它可能会在类似的东西中找到它们./pci0000:00/0000:00:1d.0/usb2/2-2/2-2.1/2-2.1:1.0/... 该
pci*部分是USB控制器。有趣的一点是2-2.1这是 USB 设备。在该目录中有很多文件可以识别您的设备：serial: 序列号。大概是你想要的。idVendor和idProduct：设备的 USB 标识符。
An easy alternatively to steps 1 and 2 is:
步骤 1 和 2 的一个简单替代方法是：
cd /sys/class/tty/readlink ttyUSBnwill give you the full path of the device directory.
cd /sys/class/tty/readlink ttyUSBn将为您提供设备目录的完整路径。
As a footnote, note that some parts of the sysfsare considered API stable and some parts are not. For more information see the official sysfs rules.
作为脚注，请注意 的某些部分sysfs被认为是 API 稳定的，而某些部分则不是。有关更多信息，请参阅官方 sysfs 规则。
