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* softdog doesn't work on 2.4.20-pre10?
@ 2002-10-09 14:07 Roy Sigurd Karlsbakk
  2002-10-09 14:40 ` Alan Cox
  0 siblings, 1 reply; 7+ messages in thread
From: Roy Sigurd Karlsbakk @ 2002-10-09 14:07 UTC (permalink / raw)
  To: Kernel mailing list

[-- Attachment #1: Type: text/plain, Size: 462 bytes --]

hi

I have the softdog running on some of my machines, and I noticed it didn't 
work very well. I've got this little program feeding the dog (attached), so 
if it gets killed, the machine should reboot.

but - this doesn't happen!

can anyone take a look at this?

roy
-- 
Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356

Computers are like air conditioners.
They stop working when you open Windows.

[-- Attachment #2: feedthedog.c --]
[-- Type: text/x-csrc, Size: 1770 bytes --]

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <syslog.h>
#include "watchdog.h"

#define TIMEOUT_DEFAULT 60

int fd;

void sig_any() {
	syslog(LOG_EMERG, "feedthedog killed by untrapped signal. System will be rebooted by watchdog.");
	exit(0);
}

void sig_term() {
	syslog(LOG_NOTICE, "Exiting, shutting down watchdog...");
	if (write(fd, "V", 1) == -1) {
		syslog(LOG_NOTICE, "Failed!");
		exit(1);
	}
	if (close(fd) == -1) {
		syslog(LOG_NOTICE, "Failed!");
		exit(1);
	}
	syslog(LOG_NOTICE, "Watchdog successfully shut down!");
	exit(0);
}

void get_info() {
	int timeout;
	struct watchdog_info info;

    ioctl(fd, WDIOC_GETTIMEOUT, &timeout);
    syslog(LOG_INFO, "Watchdog timeout is %d seconds\n", timeout);

	ioctl(fd, WDIOC_GETSUPPORT, &info);
	syslog(LOG_INFO, "Watchdog options: 0x%04x", info.options);
	syslog(LOG_INFO, "Watchdog firmware ver: %d", info.firmware_version);
	syslog(LOG_INFO, "Watchdog type:%s", info.identity);
}

int main() {
	int i,timeout;

	openlog("feedthedog", LOG_PID, LOG_DAEMON);

	if ((fd = open("/dev/watchdog", O_WRONLY)) == -1) {
		perror("open");
		exit(1);
	}

	timeout = atoi(getenv("WATCHDOG_TIMEOUT"));
	if (timeout <= 0) {
		syslog(LOG_WARNING, "Timeout set to %d. Using default.", timeout);
		timeout = TIMEOUT_DEFAULT;
	}

	get_info();
	for (i=1;i<=_NSIG;i++) {
		switch (i) {
			case SIGSTOP:
			case SIGKILL:
				break;
			case SIGTERM:
				signal(SIGTERM, sig_term);
				break;
			default:
				signal(i, sig_any);
				break;
		}
	}

	if (fork())
		exit(0);

	syslog(LOG_INFO, "Watchdog feeder started");

	while (1) {
		write(fd, "\0", 1);
		sleep(10);
	}

	return 0;
}

^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2002-10-09 15:51 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2002-10-09 14:07 softdog doesn't work on 2.4.20-pre10? Roy Sigurd Karlsbakk
2002-10-09 14:40 ` Alan Cox
2002-10-09 15:12   ` Roy Sigurd Karlsbakk
2002-10-09 15:33     ` Alan Cox
2002-10-09 15:27       ` Roy Sigurd Karlsbakk
2002-10-09 15:46         ` Alan Cox
2002-10-09 15:58           ` Roy Sigurd Karlsbakk

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