libusb检测U盘插入

摘自https://www.cnblogs.com/zzxap/archive/2011/05/18/2175687.html

Oops, my fault, hic. I should run as root and I'll get what I need. :P

Thanks,
　　　　Have a nice day!

http://libusb.sourceforge.net/doc/examples-code.html

http://fedoraforum.org/forum/showthread.php?t=178455

//libusb检测U盘插入

/* testlibusb.c from LQ*/

#include <stdio.h>
#include <string.h>
#include <usb.h>


void print_endpoint(struct usb_endpoint_descriptor *endpoint)
{
    printf(" bEndpointAddress: %02xh
", endpoint->bEndpointAddress);
    printf(" bmAttributes: %02xh
", endpoint->bmAttributes);
    printf(" wMaxPacketSize: %d
", endpoint->wMaxPacketSize);
    printf(" bInterval: %d
", endpoint->bInterval);
    printf(" bRefresh: %d
", endpoint->bRefresh);
    printf(" bSynchAddress: %d
", endpoint->bSynchAddress);
}


void print_altsetting(struct usb_interface_descriptor *interface)
{
    int i;

    printf(" bInterfaceNumber: %d
", interface->bInterfaceNumber);
    printf(" bAlternateSetting: %d
", interface->bAlternateSetting);
    printf(" bNumEndpoints: %d
", interface->bNumEndpoints);
    printf(" bInterfaceClass: %d
", interface->bInterfaceClass);
    printf(" bInterfaceSubClass: %d
", interface->bInterfaceSubClass);
    printf(" bInterfaceProtocol: %d
", interface->bInterfaceProtocol);
    printf(" iInterface: %d
", interface->iInterface);

    for (i = 0; i < interface->bNumEndpoints; i++)
        print_endpoint(&interface->endpoint[i]);
}


void print_interface(struct usb_interface *interface)
{
    int i;

    for (i = 0; i < interface->num_altsetting; i++)
        print_altsetting(&interface->altsetting[i]);
}


void print_configuration(struct usb_config_descriptor *config)
{
    int i;

    printf(" wTotalLength: %d
", config->wTotalLength);
    printf(" bNumInterfaces: %d
", config->bNumInterfaces);
    printf(" bConfigurationValue: %d
", config->bConfigurationValue);
    printf(" iConfiguration: %d
", config->iConfiguration);
    printf(" bmAttributes: %02xh
", config->bmAttributes);
    printf(" MaxPower: %d
", config->MaxPower);

    for (i = 0; i < config->bNumInterfaces; i++)
        print_interface(&config->interface[i]);
}


int main(void)
{
    struct usb_bus *bus;
    struct usb_device *dev;

    usb_init();
    usb_find_busses();
    usb_find_devices();

    printf("bus/device idVendor/idProduct
");

    for (bus = usb_busses; bus; bus = bus->next) {
        for (dev = bus->devices; dev; dev = dev->next) {
            int ret, i;
            char string[256];
            usb_dev_handle *udev;

            printf("%s/%s %04X/%04X
", bus->dirname, dev->filename,
                    dev->descriptor.idVendor, dev->descriptor.idProduct);

            udev = usb_open(dev);
            if (udev) {
                if (dev->descriptor.iManufacturer) {
                    ret = usb_get_string_simple(udev, dev->descriptor.iManufacturer, string, sizeof(string));
                    if (ret > 0)
                        printf("- Manufacturer : %s
", string);
                    else
                        printf("- Unable to fetch manufacturer string
");
                }

                if (dev->descriptor.iProduct) {
                    ret = usb_get_string_simple(udev, dev->descriptor.iProduct, string, sizeof(string));
                    if (ret > 0)
                        printf("- Product : %s
", string);
                    else
                        printf("- Unable to fetch product string
");
                }

                if (dev->descriptor.iSerialNumber) {
                    ret = usb_get_string_simple(udev, dev->descriptor.iSerialNumber, string, sizeof(string));
                    if (ret > 0)
                        printf("- Serial Number: %s
", string);
                    else
                        printf("- Unable to fetch serial number string
");
                }

                usb_close (udev);
            }

            if (!dev->config) {
                printf(" Couldn't retrieve descriptors
");
                continue;
            }

            for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
                print_configuration(&dev->config[i]);
        }
    }

    return 0;
}