libudev is quite simple library. After reading library you've mentioned and using API documentation (site should be soon up) I was able to get what I wanted. udevadm is great help, after issuing # udevadm info --query=all --name=/path/to/dev you'll get all information that udev has about this device and what's more important, these are parameters used in property functions (e.g. udev_device_get_property_value(device, "ID_VENDOR")). So best way to learn libudev is to start using it with help of signal11 tutorial, API documentation and udevadm informations.
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libudev 是一个非常简单的库。在阅读了您提到的库并使用 API 文档（网站应该很快就会上线）后，我能够得到我想要的东西。 udevadm 很有帮助，在发出
# udevadm info --query=all --name=/path/to/dev后，您将获得 udev 有关该设备的所有信息，更重要的是，这些是属性函数中使用的参数（例如udev_device_get_property_value(device, "ID_VENDOR")）。因此，学习 libudev 的最佳方法是在 signal11 教程、API 文档和 udevadm 信息的帮助下开始使用它。编辑：libudev 目前是 systemd 的一部分 - 文档可作为手册页提供 - https ://www.freedesktop.org/software/systemd/man/libudev.html#
libudev is quite simple library. After reading library you've mentioned and using API documentation (site should be soon up) I was able to get what I wanted. udevadm is great help, after issuing
# udevadm info --query=all --name=/path/to/devyou'll get all information that udev has about this device and what's more important, these are parameters used in property functions (e.g.udev_device_get_property_value(device, "ID_VENDOR")). So best way to learn libudev is to start using it with help of signal11 tutorial, API documentation and udevadm informations.EDIT: libudev is currently part of systemd - documentation is available as manual pages - https://www.freedesktop.org/software/systemd/man/libudev.html#
对于那些展望 2023 年的人……
正如 Maciej 指出的那样，libudev 现在是 systemd 的一部分。
根据：
https://www.freedesktop.org/software/systemd/人/libudev.html#
sd-device 文档：
https://www.freedesktop.org /software/systemd/man/sd-device.html#
For those looking in 2023...
As Maciej pointed out, libudev is now a part of systemd.
According to:
https://www.freedesktop.org/software/systemd/man/libudev.html#
Documentation for sd-device:
https://www.freedesktop.org/software/systemd/man/sd-device.html#