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> |
Devendra Naga | cad19fa | 2012-05-17 15:07:48 +0530 | [diff] [blame] | 10 | #include <signal.h> |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 11 | #include <sys/ioctl.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/watchdog.h> |
| 14 | |
| 15 | int fd; |
| 16 | |
| 17 | /* |
| 18 | * This function simply sends an IOCTL to the driver, which in turn ticks |
| 19 | * the PC Watchdog card to reset its internal timer so it doesn't trigger |
| 20 | * a computer reset. |
| 21 | */ |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 22 | static void keep_alive(void) |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 23 | { |
| 24 | int dummy; |
| 25 | |
| 26 | ioctl(fd, WDIOC_KEEPALIVE, &dummy); |
| 27 | } |
| 28 | |
| 29 | /* |
| 30 | * The main program. Run the program with "-d" to disable the card, |
| 31 | * or "-e" to enable the card. |
| 32 | */ |
Devendra Naga | cad19fa | 2012-05-17 15:07:48 +0530 | [diff] [blame] | 33 | |
Randy Dunlap | 4b1c2f4 | 2012-07-23 10:46:11 -0700 | [diff] [blame] | 34 | static void term(int sig) |
Devendra Naga | cad19fa | 2012-05-17 15:07:48 +0530 | [diff] [blame] | 35 | { |
| 36 | close(fd); |
| 37 | fprintf(stderr, "Stopping watchdog ticks...\n"); |
| 38 | exit(0); |
| 39 | } |
| 40 | |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 41 | int main(int argc, char *argv[]) |
| 42 | { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame] | 43 | int flags; |
| 44 | |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 45 | fd = open("/dev/watchdog", O_WRONLY); |
| 46 | |
| 47 | if (fd == -1) { |
| 48 | fprintf(stderr, "Watchdog device not enabled.\n"); |
| 49 | fflush(stderr); |
| 50 | exit(-1); |
| 51 | } |
| 52 | |
| 53 | if (argc > 1) { |
| 54 | if (!strncasecmp(argv[1], "-d", 2)) { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame] | 55 | flags = WDIOS_DISABLECARD; |
| 56 | ioctl(fd, WDIOC_SETOPTIONS, &flags); |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 57 | fprintf(stderr, "Watchdog card disabled.\n"); |
| 58 | fflush(stderr); |
Devendra Naga | 3c2a618 | 2012-05-14 23:42:02 +0530 | [diff] [blame] | 59 | goto end; |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 60 | } else if (!strncasecmp(argv[1], "-e", 2)) { |
James Hogan | dfc3338 | 2010-04-05 11:31:29 +0100 | [diff] [blame] | 61 | flags = WDIOS_ENABLECARD; |
| 62 | ioctl(fd, WDIOC_SETOPTIONS, &flags); |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 63 | fprintf(stderr, "Watchdog card enabled.\n"); |
| 64 | fflush(stderr); |
Devendra Naga | 3c2a618 | 2012-05-14 23:42:02 +0530 | [diff] [blame] | 65 | goto end; |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 66 | } else { |
| 67 | fprintf(stderr, "-d to disable, -e to enable.\n"); |
| 68 | fprintf(stderr, "run by itself to tick the card.\n"); |
| 69 | fflush(stderr); |
Devendra Naga | 3c2a618 | 2012-05-14 23:42:02 +0530 | [diff] [blame] | 70 | goto end; |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 71 | } |
| 72 | } else { |
| 73 | fprintf(stderr, "Watchdog Ticking Away!\n"); |
| 74 | fflush(stderr); |
| 75 | } |
| 76 | |
Devendra Naga | cad19fa | 2012-05-17 15:07:48 +0530 | [diff] [blame] | 77 | signal(SIGINT, term); |
| 78 | |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 79 | while(1) { |
| 80 | keep_alive(); |
| 81 | sleep(1); |
| 82 | } |
Devendra Naga | 3c2a618 | 2012-05-14 23:42:02 +0530 | [diff] [blame] | 83 | end: |
| 84 | close(fd); |
| 85 | return 0; |
Randy Dunlap | 56fb9e5 | 2006-05-21 20:58:10 -0700 | [diff] [blame] | 86 | } |