linux libudev

#include <libudev.h>
#include <stdio.h>

int main() {
    struct udev *udev;
    struct udev_enumerate *enumerate;
    struct udev_list_entry *devices, *entry;
    struct udev_device *dev;

    // 创建 udev 上下文
    udev = udev_new();
    if (!udev) {
        printf("Can't create udev\n");
        return 1;
    }

    // 创建枚举器
    enumerate = udev_enumerate_new(udev);
    udev_enumerate_add_match_subsystem(enumerate, "usb");
    udev_enumerate_scan_devices(enumerate);
    devices = udev_enumerate_get_list_entry(enumerate);

    // 遍历设备列表
    udev_list_entry_foreach(entry, devices) {
        const char *path = udev_list_entry_get_name(entry);
        dev = udev_device_new_from_syspath(udev, path);

        printf("USB Device Node Path: %s\n", path);
        printf("  Vendor ID: %s\n", udev_device_get_sysattr_value(dev, "idVendor"));
        printf("  Product ID: %s\n", udev_device_get_sysattr_value(dev, "idProduct"));

        udev_device_unref(dev);
    }

    // 清理资源
    udev_enumerate_unref(enumerate);
    udev_unref(udev);

    return 0;
}