#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");

    }

}