Commit | Line | Data |
---|---|---|
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 | */ | |
21 | void keep_alive(void) | |
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 | { | |
34 | fd = open("/dev/watchdog", O_WRONLY); | |
35 | ||
36 | if (fd == -1) { | |
37 | fprintf(stderr, "Watchdog device not enabled.\n"); | |
38 | fflush(stderr); | |
39 | exit(-1); | |
40 | } | |
41 | ||
42 | if (argc > 1) { | |
43 | if (!strncasecmp(argv[1], "-d", 2)) { | |
44 | ioctl(fd, WDIOC_SETOPTIONS, WDIOS_DISABLECARD); | |
45 | fprintf(stderr, "Watchdog card disabled.\n"); | |
46 | fflush(stderr); | |
47 | exit(0); | |
48 | } else if (!strncasecmp(argv[1], "-e", 2)) { | |
49 | ioctl(fd, WDIOC_SETOPTIONS, WDIOS_ENABLECARD); | |
50 | fprintf(stderr, "Watchdog card enabled.\n"); | |
51 | fflush(stderr); | |
52 | exit(0); | |
53 | } else { | |
54 | fprintf(stderr, "-d to disable, -e to enable.\n"); | |
55 | fprintf(stderr, "run by itself to tick the card.\n"); | |
56 | fflush(stderr); | |
57 | exit(0); | |
58 | } | |
59 | } else { | |
60 | fprintf(stderr, "Watchdog Ticking Away!\n"); | |
61 | fflush(stderr); | |
62 | } | |
63 | ||
64 | while(1) { | |
65 | keep_alive(); | |
66 | sleep(1); | |
67 | } | |
68 | } |