staticvoid usage(char *progname)
{
printf("Usage: %s [options]\n", progname);
printf(" -f, --file\t\tOpen watchdog device file\n");
printf("\t\t\tDefault is /dev/watchdog\n");
printf(" -i, --info\t\tShow watchdog_info\n");
printf(" -s, --status\t\tGet status & supported features\n");
printf(" -b, --bootstatus\tGet last boot status (Watchdog/POR)\n");
printf(" -d, --disable\t\tTurn off the watchdog timer\n");
printf(" -e, --enable\t\tTurn on the watchdog timer\n");
printf(" -h, --help\t\tPrint the help message\n");
printf(" -p, --pingrate=P\tSet ping rate to P seconds (default %d)\n",
DEFAULT_PING_RATE);
printf(" -t, --timeout=T\tSet timeout to T seconds\n");
printf(" -T, --gettimeout\tGet the timeout\n");
printf(" -n, --pretimeout=T\tSet the pretimeout to T seconds\n");
printf(" -N, --getpretimeout\tGet the pretimeout\n");
printf(" -L, --gettimeleft\tGet the time left until timer expires\n");
printf("\n");
printf("Parameters are parsed left-to-right in real-time.\n");
printf("Example: %s -d -t 10 -p 5 -e\n", progname);
printf("Example: %s -t 12 -T -n 7 -N\n", progname);
}
struct wdiof_status { int flag; constchar *status_str;
};
#define WDIOF_NUM_STATUS 8
staticconststruct wdiof_status wdiof_status[WDIOF_NUM_STATUS] = {
{WDIOF_SETTIMEOUT, "Set timeout (in seconds)"},
{WDIOF_MAGICCLOSE, "Supports magic close char"},
{WDIOF_PRETIMEOUT, "Pretimeout (in seconds), get/set"},
{WDIOF_ALARMONLY, "Watchdog triggers a management or other external alarm not a reboot"},
{WDIOF_KEEPALIVEPING, "Keep alive ping reply"},
{WDIOS_DISABLECARD, "Turn off the watchdog timer"},
{WDIOS_ENABLECARD, "Turn on the watchdog timer"},
{WDIOS_TEMPPANIC, "Kernel panic on temperature trip"},
};
staticvoid print_status(int flags)
{ int wdiof = 0;
if (flags == WDIOS_UNKNOWN) {
printf("Unknown status error from WDIOC_GETSTATUS\n"); return;
}
for (wdiof = 0; wdiof < WDIOF_NUM_STATUS; wdiof++) { if (flags & wdiof_status[wdiof].flag)
printf("Support/Status: %s\n",
wdiof_status[wdiof].status_str);
}
}
#define WDIOF_NUM_BOOTSTATUS 7
staticconststruct wdiof_status wdiof_bootstatus[WDIOF_NUM_BOOTSTATUS] = {
{WDIOF_OVERHEAT, "Reset due to CPU overheat"},
{WDIOF_FANFAULT, "Fan failed"},
{WDIOF_EXTERN1, "External relay 1"},
{WDIOF_EXTERN2, "External relay 2"},
{WDIOF_POWERUNDER, "Power bad/power fault"},
{WDIOF_CARDRESET, "Card previously reset the CPU"},
{WDIOF_POWEROVER, "Power over voltage"},
};
staticvoid print_boot_status(int flags)
{ int wdiof = 0;
if (flags == WDIOF_UNKNOWN) {
printf("Unknown flag error from WDIOC_GETBOOTSTATUS\n"); return;
}
if (flags == 0) {
printf("Last boot is caused by: Power-On-Reset\n"); return;
}
for (wdiof = 0; wdiof < WDIOF_NUM_BOOTSTATUS; wdiof++) { if (flags & wdiof_bootstatus[wdiof].flag)
printf("Last boot is caused by: %s\n",
wdiof_bootstatus[wdiof].status_str);
}
}
int main(int argc, char *argv[])
{ int flags; unsignedint ping_rate = DEFAULT_PING_RATE; int ret; int c; int oneshot = 0; char *file = "/dev/watchdog"; struct watchdog_info info; int temperature;
setbuf(stdout, NULL);
while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) { if (c == 'f')
file = optarg;
}
fd = open(file, O_WRONLY);
if (fd == -1) { if (errno == ENOENT)
printf("Watchdog device (%s) not found.\n", file); elseif (errno == EACCES)
printf("Run watchdog as root.\n"); else
printf("Watchdog device open failed %s\n",
strerror(errno)); exit(-1);
}
/* *Validatethat`file`isawatchdogdevice
*/
ret = ioctl(fd, WDIOC_GETSUPPORT, &info); if (ret) {
printf("WDIOC_GETSUPPORT error '%s'\n", strerror(errno));
close(fd); exit(ret);
}
optind = 0;
while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) { switch (c) { case'b':
flags = 0;
oneshot = 1;
ret = ioctl(fd, WDIOC_GETBOOTSTATUS, &flags); if (!ret)
print_boot_status(flags); else
printf("WDIOC_GETBOOTSTATUS error '%s'\n", strerror(errno)); break; case'd':
flags = WDIOS_DISABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags); if (!ret)
printf("Watchdog card disabled.\n"); else {
printf("WDIOS_DISABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'e':
flags = WDIOS_ENABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags); if (!ret)
printf("Watchdog card enabled.\n"); else {
printf("WDIOS_ENABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'p':
ping_rate = strtoul(optarg, NULL, 0); if (!ping_rate)
ping_rate = DEFAULT_PING_RATE;
printf("Watchdog ping rate set to %u seconds.\n", ping_rate); break; case's':
flags = 0;
oneshot = 1;
ret = ioctl(fd, WDIOC_GETSTATUS, &flags); if (!ret)
print_status(flags); else
printf("WDIOC_GETSTATUS error '%s'\n", strerror(errno));
ret = ioctl(fd, WDIOC_GETTEMP, &temperature); if (ret)
printf("WDIOC_GETTEMP: '%s'\n", strerror(errno)); else
printf("Temperature %d\n", temperature);
/* Check if WDIOF_KEEPALIVEPING is supported */ if (!(info.options & WDIOF_KEEPALIVEPING)) {
printf("WDIOC_KEEPALIVE not supported by this device\n"); goto end;
}
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