Переподключение usb-устройства

#!/usr/bin/python3
import fcntl

USBDEVFS_RESET=21780
fcntl.ioctl(open('/dev/bus/usb/x/y','w'),USBDEVFS_RESET)

/* usbreset -- send a USB port reset to a USB device */

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>

#include <linux/usbdevice_fs.h>


int main(int argc, char **argv)
{
    const char *filename;
    int fd;
    int rc;

    if (argc != 2) {
        fprintf(stderr, "Usage: usbreset device-filename\n");
        return 1;
    }
    filename = argv[1];

    fd = open(filename, O_WRONLY);
    if (fd < 0) {
        perror("Error opening output file");
        return 1;
    }

    printf("Resetting USB device %s\n", filename);
    rc = ioctl(fd, USBDEVFS_RESET, 0);
    if (rc < 0) {
        perror("Error in ioctl");
        return 1;
    }
    printf("Reset successful\n");

    close(fd);
    return 0;
}

//gcc -o usb-reset usb-reset.c -lusb
#include <usb.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>

main (int argc, char **argv)
{
      struct usb_bus *busses;
      usb_init();
      usb_find_busses();
      usb_find_devices();
      busses = usb_get_busses();
      struct usb_bus *bus;
      int c, i, a;
      /* ... */
      for (bus = busses; bus; bus = bus->next) {
        struct usb_device *dev;
        int val;
        usb_dev_handle *junk;
        for (dev = bus->devices; dev; dev = dev->next) {
          char buf[1024];
          junk = usb_open ( dev );
          usb_get_string_simple(junk,2,buf,1023);
          if ( junk == NULL ){
            printf("Can't open %p (%s)\n", dev, buf );
          } else {
           printf( "find %p (%s)\n", dev, buf );
           if((argc>1) && strstr(buf,argv[1]))
           {
            val = usb_reset(junk);
            val = usb_resetep(junk,0);
            printf( "reset %p %d (%s)\n", dev, val, buf );
           }
          }
          usb_close(junk);
        }
      }

}