static void
pcmk_panic_local(void)
{
int rc = pcmk_ok;
uid_t uid = geteuid();
pid_t ppid = getppid();
if(uid != 0 && ppid > 1) {
/* We're a non-root pacemaker daemon (cib, crmd, pengine,
* attrd, etc) with the original pacemakerd parent
*
* Of these, only crmd is likely to be initiating resets
*/
do_crm_log_always(LOG_EMERG, "Signaling parent %d to panic", ppid);
crm_exit(pcmk_err_panic);
return;
} else if (uid != 0) {
/*
* No permissions and no pacemakerd parent to escalate to
* Track down the new pacakerd process and send a signal instead
*/
union sigval signal_value;
memset(&signal_value, 0, sizeof(signal_value));
ppid = crm_procfs_pid_of("pacemakerd");
do_crm_log_always(LOG_EMERG, "Signaling pacemakerd(%d) to panic", ppid);
if(ppid > 1 && sigqueue(ppid, SIGQUIT, signal_value) < 0) {
crm_perror(LOG_EMERG, "Cannot signal pacemakerd(%d) to panic", ppid);
}
/* The best we can do now is die */
crm_exit(pcmk_err_panic);
return;
}
/* We're either pacemakerd, or a pacemaker daemon running as root */
if (safe_str_eq("crash", getenv("PCMK_panic_action"))) {
sysrq_trigger('c');
} else {
sysrq_trigger('b');
}
/* reboot(RB_HALT_SYSTEM); rc = errno; */
reboot(RB_AUTOBOOT);
rc = errno;
do_crm_log_always(LOG_EMERG, "Reboot failed, escalating to %d: %s (%d)", ppid, pcmk_strerror(rc), rc);
if(ppid > 1) {
/* child daemon */
exit(pcmk_err_panic);
} else {
/* pacemakerd or orphan child */
exit(DAEMON_RESPAWN_STOP);
}
}
pid_t
pcmk_locate_sbd(void)
{
char *pidfile = NULL;
char *sbd_path = NULL;
if(sbd_pid > 1) {
return sbd_pid;
}
/* Look for the pid file */
pidfile = crm_strdup_printf("%s/sbd.pid", HA_STATE_DIR);
sbd_path = crm_strdup_printf("%s/sbd", SBIN_DIR);
/* Read the pid file */
CRM_ASSERT(pidfile);
sbd_pid = crm_pidfile_inuse(pidfile, 0, sbd_path);
if(sbd_pid > 0) {
crm_trace("SBD detected at pid=%d (file)", sbd_pid);
} else {
/* Fall back to /proc for systems that support it */
sbd_pid = crm_procfs_pid_of("sbd");
crm_trace("SBD detected at pid=%d (proc)", sbd_pid);
}
if(sbd_pid < 0) {
sbd_pid = 0;
crm_trace("SBD not detected");
}
free(pidfile);
free(sbd_path);
return sbd_pid;
}
/*!
* \internal
* \brief Return name of /proc file containing the CIB deamon's load statistics
*
* \return Newly allocated memory with file name on success, NULL otherwise
*
* \note It is the caller's responsibility to free the return value.
* This will return NULL if the daemon is being run via valgrind.
* This should be called only on Linux systems.
*/
static char *find_cib_loadfile(void)
{
int pid = crm_procfs_pid_of("cib");
return pid? crm_strdup_printf("/proc/%d/stat", pid) : NULL;
}