Libusb如何获取VID和PID

#include <libusb-1.0/libusb.h>
#include <stdio.h>

int main() {
    libusb_device **devs;
    libusb_device *dev;
    libusb_device_descriptor desc;
    libusb_context *ctx = NULL;
    int r;
    ssize_t cnt;

    r = libusb_init(&ctx);
    if (r < 0) {
        printf("Init error %d\n", r);
        return 1;
    }

    cnt = libusb_get_device_list(ctx, &devs);
    if (cnt < 0) {
        printf("Get device list error %d\n", (int) cnt);
        return 1;
    }

    for (ssize_t i = 0; i < cnt; i++) {
        dev = devs[i];
        r = libusb_get_device_descriptor(dev, &desc);
        if (r < 0) {
            printf("Get device descriptor error %d\n", r);
            continue;
        }
        printf("VID: 0x%04x, PID: 0x%04x\n", desc.idVendor, desc.idProduct);
    }

    libusb_free_device_list(devs, 1);
    libusb_exit(ctx);

    return 0;
}