Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 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 | */ |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 21 | static void keep_alive(void) |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 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 | { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame^] | 34 | int flags; |
| 35 | |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 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)) { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame^] | 46 | flags = WDIOS_DISABLECARD; |
| 47 | ioctl(fd, WDIOC_SETOPTIONS, &flags); |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 48 | fprintf(stderr, "Watchdog card disabled.\n"); |
| 49 | fflush(stderr); |
| 50 | exit(0); |
| 51 | } else if (!strncasecmp(argv[1], "-e", 2)) { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame^] | 52 | flags = WDIOS_ENABLECARD; |
| 53 | ioctl(fd, WDIOC_SETOPTIONS, &flags); |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 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 | } |