Commit | Line | Data |
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56fb9e53 RD |
1 | /* |
2 | * Watchdog Driver Test Program | |
3 | */ | |
4 | ||
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <string.h> | |
8 | #include <unistd.h> | |
9 | #include <fcntl.h> | |
10 | #include <sys/ioctl.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/watchdog.h> | |
13 | ||
14 | int fd; | |
15 | ||
16 | /* | |
17 | * This function simply sends an IOCTL to the driver, which in turn ticks | |
18 | * the PC Watchdog card to reset its internal timer so it doesn't trigger | |
19 | * a computer reset. | |
20 | */ | |
b7ed698c | 21 | static void keep_alive(void) |
56fb9e53 RD |
22 | { |
23 | int dummy; | |
24 | ||
25 | ioctl(fd, WDIOC_KEEPALIVE, &dummy); | |
26 | } | |
27 | ||
28 | /* | |
29 | * The main program. Run the program with "-d" to disable the card, | |
30 | * or "-e" to enable the card. | |
31 | */ | |
32 | int main(int argc, char *argv[]) | |
33 | { | |
dfc33383 JH |
34 | int flags; |
35 | ||
56fb9e53 RD |
36 | fd = open("/dev/watchdog", O_WRONLY); |
37 | ||
38 | if (fd == -1) { | |
39 | fprintf(stderr, "Watchdog device not enabled.\n"); | |
40 | fflush(stderr); | |
41 | exit(-1); | |
42 | } | |
43 | ||
44 | if (argc > 1) { | |
45 | if (!strncasecmp(argv[1], "-d", 2)) { | |
dfc33383 JH |
46 | flags = WDIOS_DISABLECARD; |
47 | ioctl(fd, WDIOC_SETOPTIONS, &flags); | |
56fb9e53 RD |
48 | fprintf(stderr, "Watchdog card disabled.\n"); |
49 | fflush(stderr); | |
50 | exit(0); | |
51 | } else if (!strncasecmp(argv[1], "-e", 2)) { | |
dfc33383 JH |
52 | flags = WDIOS_ENABLECARD; |
53 | ioctl(fd, WDIOC_SETOPTIONS, &flags); | |
56fb9e53 RD |
54 | fprintf(stderr, "Watchdog card enabled.\n"); |
55 | fflush(stderr); | |
56 | exit(0); | |
57 | } else { | |
58 | fprintf(stderr, "-d to disable, -e to enable.\n"); | |
59 | fprintf(stderr, "run by itself to tick the card.\n"); | |
60 | fflush(stderr); | |
61 | exit(0); | |
62 | } | |
63 | } else { | |
64 | fprintf(stderr, "Watchdog Ticking Away!\n"); | |
65 | fflush(stderr); | |
66 | } | |
67 | ||
68 | while(1) { | |
69 | keep_alive(); | |
70 | sleep(1); | |
71 | } | |
72 | } |