Hi George, On Thu, Aug 29, 2019 at 12:39:25AM -0400, George G. Davis wrote: > Some systems have multiple watchdog devices where the first device > registered is assigned to the /dev/watchdog device file. Confirmed on R-Car H3-Salvator-X: root@rcar-gen3:~# ls -al /dev/watchdog* crw------- 1 root root 10, 130 Aug 21 09:38 /dev/watchdog crw------- 1 root root 247, 0 Aug 21 09:38 /dev/watchdog0 [..] > - fd = open("/dev/watchdog", O_WRONLY); > + while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) { > + if (c == 'f') > + file = optarg; > + } > + > + fd = open(file, O_WRONLY); Would it be possible to improve below not so helpful and slightly misleading printout: $ ./watchdog-test -d -t 10 -p 5 -e -f /dev/watch Watchdog device not enabled. Thanks! -- Best Regards, Eugeniu.