/* Reproducing MythTV bug concerning several usb tuners with
 * media_tree for_3.6 top commit 50fbe32cf41a8309ed8016eb6f81232acfa23ae7
 * (at least).
 *
 * Usage:
 * ioctltst /dev/dvb/adapter0/frontend0	(no sleep)
 *
 * or:
 * ioctltst /dev/dvb/adapter0/frontend0	1 (usleep 1ms between ioctls)
 */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/dvb/frontend.h>

void ioctltst(char *frontend, int flags)
{
	struct dvb_frontend_info info;

	int fd = open(frontend, flags);
	if (fd < 0) {
		perror("open");
		return;
	}
	int err = ioctl(fd, FE_GET_INFO, &info);
	if (err < 0) {
		perror("ioctl");
	}
	close(fd);
}

int main(int argc, char **argv)
{
	if (argc < 2)
		return 1;
	ioctltst(argv[1], O_RDWR);
	if (argc >= 3)
		usleep(atoi(argv[2]) * 1000UL);
	ioctltst(argv[1], O_RDONLY);
	return 0;
}