Touchscreen lock via tslib

lock.c

#include "tslib/src/tslib.h"

struct tsdev *ts;
char *tsdevice = "/dev/input/event0";
ts = ts_open(tsdevice, 0);
int ts_tmpfd = ts_fd(ts);

if (ts_tmpfd == -1)
{
    perror("ts_open");
    exit(1);
}

unsigned long val = 1;
int ioctl_ret = ioctl(ts_tmpfd, EVIOCGRAB, &val);

printf("now lock the ts ioctl ret is: %d\n", ioctl_ret);
if (ioctl_ret != 0)
{
    printf("Error: %s\n", strerror(errno));
    exit(1);
}

printf("lock the ts succeed\n");