#include <sys/types.h>

 #include <sys/ioctl.h>

 #include <dev/usb/usb.h>

 #include <sys/errno.h>

 #include <sys/uio.h>

 #include <unistd.h>

 #include <fcntl.h>

 #include <stdio.h>

 int

 main(int argc, char **argv) {

     int		endpt2fd, i, len;

     char	*endpt2name = "/dev/ugen0.2";

     uint8_t	data[256];

     if ((endpt2fd = open(endpt2name, O_RDWR)) == -1) {

 	fprintf(stderr, "Unable to open %s: %s\n", endpt2name, strerror(errno));

 	exit(1);

     }

     i = 1;

     if (ioctl(endpt2fd, USB_SET_SHORT_XFER, &i) == -1) {

 	fprintf(stderr, "Unable to set short xfer on end point 2: %s\n", strerror(errno));

 	exit(1);

     }

     while(1) {

 	len = read(endpt2fd, data, 256);

 	printf("len = %d\n", len);

 	if (len == 0) {

 	    printf("EOF\n");

 	    continue;

 	}

 	if (len == -1) {

 	    printf("read error: %s\n", strerror(errno));

 	    exit(1);

 	}

 	for (i = 0; i < len; i++)

 	    printf("0x%02x ", data[i]);

 	printf("\n");

     }

 }