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                # 看門狗的使用 echo 0 >/dev/watchdog0 echo V >/dev/watchdog0 設置和獲得超時值: 對于某些驅動來說,在上層使用SETTIMEOUT ioctl命令改變watchdog的超時值是可能的,那些驅動在他們的選項與中有WDIOF_SETTIMEOUT標志。參數是一個代表以秒為單位的超時值,驅動將在同一個變量中返回實際使用的超時值,這個超時值可能由于硬件的限制,而不同于所請求的超時值 int timeout = 45; ioctl(fd, WDIOC_SETTIMEOUT, &timeout); printf("The timeout was set to %d seconds\n", timeout); 如果設備的超時值的粒度只能到分鐘,則這個例子可能實際打印"The timeout was set to 60 seconds"。 自從Linux 2.4.18內核,通過GETTIMEOUT ioctl命令查詢當前超時值也是可能的: ioctl(fd, WDIOC_GETTIMEOUT, &timeout); printf("The timeout was is %d seconds\n", timeout);
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