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

int main(void)
{
    int ret = 0;
    struct watchdog_info wdinfo;
    int fd = open("/dev/watchdog", O_WRONLY);

    if (fd < 0) {
        return -1;
    }
    ret=ioctl(fd, WDIOC_GETSUPPORT, &wdinfo);
    if( ret < 0 ) {
        return -1;
    }
    printf("options=0x%x version=0x%x identity=%s\n",
        wdinfo.options, wdinfo.firmware_version,
        wdinfo.identity);
    write(fd, "V", 1); //Watchdog deaktivieren
    close(fd);
    return 0;
}