109 lines
2.6 KiB
Diff
109 lines
2.6 KiB
Diff
References: bsc#1178736
|
|
|
|
Allow restart of xenwatchdogd in case it terminated unexpectetly.
|
|
Index: xen-4.14.0-testing/tools/misc/xenwatchdogd.c
|
|
===================================================================
|
|
--- xen-4.14.0-testing.orig/tools/misc/xenwatchdogd.c
|
|
+++ xen-4.14.0-testing/tools/misc/xenwatchdogd.c
|
|
@@ -9,12 +9,16 @@
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
+#include <libgen.h>
|
|
+#include <syslog.h>
|
|
|
|
xc_interface *h;
|
|
int id = 0;
|
|
+static const char id_file[] = "/run/xenwatchdog_id.txt";
|
|
|
|
-void daemonize(void)
|
|
+static void daemonize(const char *str)
|
|
{
|
|
+ const char *err_str = "";
|
|
switch (fork()) {
|
|
case -1:
|
|
err(1, "fork");
|
|
@@ -23,7 +27,9 @@ void daemonize(void)
|
|
default:
|
|
exit(0);
|
|
}
|
|
- umask(0);
|
|
+#define err(x,s) do { err_str = (s); goto out; } while (0)
|
|
+ openlog(str, LOG_CONS, LOG_DAEMON);
|
|
+ umask(~(S_IRUSR|S_IWUSR));
|
|
if (setsid() < 0)
|
|
err(1, "setsid");
|
|
if (chdir("/") < 0)
|
|
@@ -34,6 +40,10 @@ void daemonize(void)
|
|
err(1, "reopen stdout");
|
|
if(freopen("/dev/null", "w", stderr) == NULL)
|
|
err(1, "reopen stderr");
|
|
+ return;
|
|
+out:
|
|
+ syslog(LOG_ERR, "%s: %m", err_str);
|
|
+ exit(1);
|
|
}
|
|
|
|
void catch_exit(int sig)
|
|
@@ -47,18 +57,21 @@ void catch_usr1(int sig)
|
|
{
|
|
if (id)
|
|
xc_watchdog(h, id, 0);
|
|
+ unlink(id_file);
|
|
exit(0);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
+ FILE *f;
|
|
int t, s;
|
|
int ret;
|
|
+ const char *err_str = "";
|
|
|
|
if (argc < 2)
|
|
errx(1, "usage: %s <timeout> <sleep>", argv[0]);
|
|
|
|
- daemonize();
|
|
+ daemonize(basename(argv[0]));
|
|
|
|
h = xc_interface_open(NULL, NULL, 0);
|
|
if (h == NULL)
|
|
@@ -86,9 +99,25 @@ int main(int argc, char **argv)
|
|
if (signal(SIGUSR1, &catch_usr1) == SIG_ERR)
|
|
err(1, "signal");
|
|
|
|
- id = xc_watchdog(h, 0, t);
|
|
- if (id <= 0)
|
|
- err(1, "xc_watchdog setup");
|
|
+ f = fopen(id_file, "r");
|
|
+ if (f) {
|
|
+ if (fscanf(f, "%d", &id) != 1)
|
|
+ id = -1;
|
|
+ if (id <= 0)
|
|
+ err(1, "xc_watchdog setup");
|
|
+ syslog(LOG_INFO, "reusing id %d", id);
|
|
+ fclose(f);
|
|
+ } else {
|
|
+ id = xc_watchdog(h, 0, t);
|
|
+ syslog(LOG_INFO, "obtained id %d", id);
|
|
+ if (id <= 0)
|
|
+ err(1, "xc_watchdog setup");
|
|
+ f = fopen(id_file, "w");
|
|
+ if (f) {
|
|
+ fprintf(f, "%d\n", id);
|
|
+ fclose(f);
|
|
+ }
|
|
+ }
|
|
|
|
for (;;) {
|
|
sleep(s);
|
|
@@ -96,4 +125,8 @@ int main(int argc, char **argv)
|
|
if (ret != 0)
|
|
err(1, "xc_watchdog");
|
|
}
|
|
+
|
|
+out:
|
|
+ syslog(LOG_ERR, "%s: %m", err_str);
|
|
+ exit(1);
|
|
}
|