On 08/17/2015 10:15 PM, Pratyush Anand wrote:
Hi, I am looking for the best way to know if a watchdog has been kicked and active. I can see a way is to read timeout(WDIOC_GETTIMEOUT) and timeleft( WDIOC_GETTIMELEFT). If they do not match, it means that wdt is active. But what if we tried to read timeleft just in time when watchdog daemon/or some other application had kicked it. May be we read timeleft twice at the interval of 1 sec. Please let me know if there is any other alternative which could be a better way to know if watchdog is active? Or may be it would be good to implement an ioctl WDIOC_ACTIVE?
Normally the watchdog is active if the watchdog device is open, unless the application controlling it explicitly disabled it with WDIOC_SETOPTIONS. Therefore, the controlling application should always know the status. A different application can not open the watchdog device, so it won't be able to get its status using an ioctl anyway. Why is that insufficient ? Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
