1dbdcc8109
Watchdog drivers are not required to retain programming information, such as timeouts, after the watchdog device is closed. Therefore, the watchdog test should be able to perform multiple actions after opening the watchdog device. For example, to set the timeout to 10s and ping every 5s: watchdog-test -t 10 -p 5 -e Also, display the periodic decimal point only if the keep-alive call succeeds. Signed-off-by: Timur Tabi <timur@codeaurora.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
/*
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* Watchdog Driver Test Program
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <linux/types.h>
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#include <linux/watchdog.h>
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int fd;
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const char v = 'V';
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/*
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* This function simply sends an IOCTL to the driver, which in turn ticks
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* the PC Watchdog card to reset its internal timer so it doesn't trigger
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* a computer reset.
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*/
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static void keep_alive(void)
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{
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int dummy;
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int ret;
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ret = ioctl(fd, WDIOC_KEEPALIVE, &dummy);
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if (!ret)
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printf(".");
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}
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/*
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* The main program. Run the program with "-d" to disable the card,
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* or "-e" to enable the card.
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*/
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static void term(int sig)
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{
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int ret = write(fd, &v, 1);
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close(fd);
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if (ret < 0)
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printf("\nStopping watchdog ticks failed (%d)...\n", errno);
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else
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printf("\nStopping watchdog ticks...\n");
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exit(0);
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}
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int main(int argc, char *argv[])
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{
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int flags;
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unsigned int ping_rate = 1;
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int ret;
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int i;
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setbuf(stdout, NULL);
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fd = open("/dev/watchdog", O_WRONLY);
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if (fd == -1) {
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printf("Watchdog device not enabled.\n");
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exit(-1);
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}
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for (i = 1; i < argc; i++) {
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if (!strncasecmp(argv[i], "-d", 2)) {
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flags = WDIOS_DISABLECARD;
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ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
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if (!ret)
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printf("Watchdog card disabled.\n");
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} else if (!strncasecmp(argv[i], "-e", 2)) {
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flags = WDIOS_ENABLECARD;
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ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
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if (!ret)
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printf("Watchdog card enabled.\n");
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} else if (!strncasecmp(argv[i], "-t", 2) && argv[2]) {
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flags = atoi(argv[i + 1]);
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ret = ioctl(fd, WDIOC_SETTIMEOUT, &flags);
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if (!ret)
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printf("Watchdog timeout set to %u seconds.\n", flags);
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i++;
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} else if (!strncasecmp(argv[i], "-p", 2) && argv[2]) {
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ping_rate = strtoul(argv[i + 1], NULL, 0);
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printf("Watchdog ping rate set to %u seconds.\n", ping_rate);
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i++;
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} else {
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printf("-d to disable, -e to enable, -t <n> to set "
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"the timeout,\n-p <n> to set the ping rate, and ");
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printf("run by itself to tick the card.\n");
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printf("Parameters are parsed left-to-right in real-time.\n");
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printf("Example: %s -d -t 10 -p 5 -e\n", argv[0]);
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goto end;
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}
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}
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printf("Watchdog Ticking Away!\n");
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signal(SIGINT, term);
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while(1) {
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keep_alive();
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sleep(ping_rate);
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}
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end:
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ret = write(fd, &v, 1);
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if (ret < 0)
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printf("Stopping watchdog ticks failed (%d)...\n", errno);
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close(fd);
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return 0;
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}
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