void
crm_enable_blackbox(int nsig)
{
if (blackbox_file_prefix == NULL) {
pid_t pid = getpid();
blackbox_file_prefix = malloc(NAME_MAX);
snprintf(blackbox_file_prefix, NAME_MAX, "%s/%s-%d", CRM_BLACKBOX_DIR, crm_system_name,
pid);
}
if (qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_STATE_GET, 0) != QB_LOG_STATE_ENABLED) {
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_SIZE, 5 * 1024 * 1024); /* Any size change drops existing entries */
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_TRUE); /* Setting the size seems to disable it */
crm_notice("Initiated blackbox recorder: %s", blackbox_file_prefix);
/* Save to disk on abnormal termination */
crm_signal(SIGSEGV, crm_trigger_blackbox);
crm_signal(SIGABRT, crm_trigger_blackbox);
crm_signal(SIGILL, crm_trigger_blackbox);
crm_signal(SIGBUS, crm_trigger_blackbox);
crm_update_callsites();
blackbox_trigger = qb_log_custom_open(blackbox_logger, NULL, NULL, NULL);
qb_log_ctl(blackbox_trigger, QB_LOG_CONF_ENABLED, QB_TRUE);
crm_trace("Trigger: %d is %d %d", blackbox_trigger,
qb_log_ctl(blackbox_trigger, QB_LOG_CONF_STATE_GET, 0), QB_LOG_STATE_ENABLED);
crm_update_callsites();
}
}
void
alter_debug(int nsig)
{
crm_signal(DEBUG_INC, alter_debug);
crm_signal(DEBUG_DEC, alter_debug);
switch(nsig) {
case DEBUG_INC:
if (crm_log_level < 100) {
crm_log_level++;
}
break;
case DEBUG_DEC:
if (crm_log_level > 0) {
crm_log_level--;
}
break;
default:
fprintf(stderr, "Unknown signal %d\n", nsig);
cl_log(LOG_ERR, "Unknown signal %d", nsig);
break;
}
}
gboolean
crm_log_init(
const char *entity, int level, gboolean coredir, gboolean to_stderr,
int argc, char **argv)
{
/* Redirect messages from glib functions to our handler */
/* cl_malloc_forced_for_glib(); */
#ifdef HAVE_G_LOG_SET_DEFAULT_HANDLER
glib_log_default = g_log_set_default_handler(crm_glib_handler, NULL);
#endif
/* and for good measure... - this enum is a bit field (!) */
g_log_set_always_fatal((GLogLevelFlags)0); /*value out of range*/
crm_system_name = entity;
setenv("PCMK_service", crm_system_name, 1);
cl_log_set_entity(entity);
if(argc == 0) {
/* Nuke any syslog activity */
unsetenv("HA_logfacility");
} else if(getenv("HA_logfacility") == NULL) {
/* Set a default */
cl_log_set_facility(HA_LOG_FACILITY);
} /* else: picked up by crm_set_env_options() */
if(coredir) {
int user = getuid();
struct passwd *pwent = NULL;
const char *base = HA_COREDIR;
pwent = getpwuid(user);
if (chdir(base) < 0) {
crm_perror(LOG_ERR, "Cannot change active directory to %s", base);
} else if (pwent == NULL) {
crm_perror(LOG_ERR, "Cannot get name for uid: %d", user);
} else if (chdir(pwent->pw_name) < 0) {
crm_perror(LOG_ERR, "Cannot change active directory to %s/%s", base, pwent->pw_name);
} else {
crm_info("Changed active directory to %s/%s", base, pwent->pw_name);
}
}
set_crm_log_level(level);
crm_set_env_options();
cl_log_args(argc, argv);
cl_log_enable_stderr(to_stderr);
crm_signal(DEBUG_INC, alter_debug);
crm_signal(DEBUG_DEC, alter_debug);
return TRUE;
}
void
crm_enable_blackbox(int nsig)
{
if(blackbox_file_prefix == NULL) {
pid_t pid = getpid();
blackbox_file_prefix = malloc(NAME_MAX);
snprintf(blackbox_file_prefix, NAME_MAX, "%s/blackbox-%s-%d", CRM_BLACKBOX_DIR, crm_system_name, pid);
}
if (qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_STATE_GET, 0) != QB_LOG_STATE_ENABLED) {
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_SIZE, 1024*1024); /* Any size change drops existing entries */
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_TRUE); /* Setting the size seems to disable it */
crm_notice("Initiated blackbox recorder: %s", blackbox_file_prefix);
crm_signal(SIGSEGV, crm_write_blackbox);
crm_update_callsites();
/* Original meanings from signal(7)
*
* Signal Value Action Comment
* SIGPROF 27,27,29 Term Profiling timer expired
* SIGTRAP 5 Core Trace/breakpoint trap
*
* Our usage is as similar as possible
*/
mainloop_add_signal(SIGPROF, crm_enable_blackbox_tracing);
mainloop_add_signal(SIGTRAP, crm_write_blackbox);
}
}
gboolean
mainloop_add_signal(int sig, void (*dispatch) (int sig))
{
GSource *source = NULL;
int priority = G_PRIORITY_HIGH - 1;
if (sig == SIGTERM) {
/* TERM is higher priority than other signals,
* signals are higher priority than other ipc.
* Yes, minus: smaller is "higher"
*/
priority--;
}
if (sig >= NSIG || sig < 0) {
crm_err("Signal %d is out of range", sig);
return FALSE;
} else if (crm_signals[sig] != NULL
&& crm_signals[sig]->handler == dispatch) {
crm_trace("Signal handler for %d is already installed", sig);
return TRUE;
} else if (crm_signals[sig] != NULL) {
crm_err("Different signal handler for %d is already installed", sig);
return FALSE;
}
CRM_ASSERT(sizeof(crm_signal_t) > sizeof(GSource));
source = g_source_new(&crm_signal_funcs, sizeof(crm_signal_t));
crm_signals[sig] = (crm_signal_t *) mainloop_setup_trigger(source, priority, NULL, NULL);
CRM_ASSERT(crm_signals[sig] != NULL);
crm_signals[sig]->handler = dispatch;
crm_signals[sig]->signal = sig;
if (crm_signal(sig, mainloop_signal_handler) == FALSE) {
crm_signal_t *tmp = crm_signals[sig];
crm_signals[sig] = NULL;
mainloop_destroy_trigger((crm_trigger_t *) tmp);
return FALSE;
}
#if 0
/* If we want signals to interrupt mainloop's poll(), instead of waiting for
* the timeout, then we should call siginterrupt() below
*
* For now, just enforce a low timeout
*/
if (siginterrupt(sig, 1) < 0) {
crm_perror(LOG_INFO, "Could not enable system call interruptions for signal %d", sig);
}
#endif
return TRUE;
}
void
crm_write_blackbox(int nsig, struct qb_log_callsite *cs)
{
static int counter = 1;
static time_t last = 0;
char buffer[NAME_MAX];
time_t now = time(NULL);
if (blackbox_file_prefix == NULL) {
return;
}
switch (nsig) {
case 0:
case SIGABRT:
case SIGTRAP:
/* The graceful case - such as assertion failure or user request */
if (nsig == 0 && now == last) {
/* Prevent over-dumping */
return;
}
snprintf(buffer, NAME_MAX, "%s.%d", blackbox_file_prefix, counter++);
if (nsig == SIGTRAP) {
crm_notice("Blackbox dump requested, please see %s for contents", buffer);
} else if (cs) {
syslog(LOG_NOTICE,
"Problem detected at %s:%d (%s), please see %s for additional details",
cs->function, cs->lineno, cs->filename, buffer);
} else {
crm_notice("Problem detected, please see %s for additional details", buffer);
}
last = now;
qb_log_blackbox_write_to_file(buffer);
/* Flush the existing contents
* A size change would also work
*/
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_FALSE);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_TRUE);
break;
default:
/* Do as little as possible, just try to get what we have out
* We logged the filename when the blackbox was enabled
*/
crm_signal(nsig, SIG_DFL);
qb_log_blackbox_write_to_file(blackbox_file_prefix);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_FALSE);
raise(nsig);
break;
}
}
gboolean
mainloop_destroy_signal(int sig)
{
crm_signal_t *tmp = NULL;
if (sig >= NSIG || sig < 0) {
crm_err("Signal %d is out of range", sig);
return FALSE;
} else if (crm_signal(sig, NULL) == FALSE) {
crm_perror(LOG_ERR, "Could not uninstall signal handler for signal %d", sig);
return FALSE;
} else if (crm_signals[sig] == NULL) {
return TRUE;
}
tmp = crm_signals[sig];
crm_signals[sig] = NULL;
mainloop_destroy_trigger((crm_trigger_t *) tmp);
return TRUE;
}
int
main(int argc, char **argv)
{
int argerr = 0;
int flag;
int attempts = 0;
#ifdef HAVE_GETOPT_H
int option_index = 0;
static struct option long_options[] = {
/* Top-level Options */
{"verbose", 0, 0, 'V'},
{"help", 0, 0, '?'},
{"log-diffs", 0, 0, 'd'},
{"log-updates", 0, 0, 'u'},
{"max-conn-fail", 1, 0, 'm'},
{0, 0, 0, 0}
};
#endif
crm_log_cli_init("cibmon");
crm_signal(SIGTERM, cibmon_shutdown);
while (1) {
#ifdef HAVE_GETOPT_H
flag = getopt_long(argc, argv, OPTARGS, long_options, &option_index);
#else
flag = getopt(argc, argv, OPTARGS);
#endif
if (flag == -1)
break;
switch (flag) {
case 'V':
crm_bump_log_level(argc, argv);
break;
case '?':
usage(crm_system_name, EX_OK);
break;
case 'd':
log_diffs = TRUE;
break;
case 'u':
log_updates = TRUE;
break;
case 'm':
max_failures = crm_parse_int(optarg, "30");
break;
default:
printf("Argument code 0%o (%c)" " is not (?yet?) supported\n", flag, flag);
++argerr;
break;
}
}
if (optind < argc) {
printf("non-option ARGV-elements: ");
while (optind < argc)
printf("%s ", argv[optind++]);
printf("\n");
}
if (optind > argc) {
++argerr;
}
if (argerr) {
usage(crm_system_name, EX_USAGE);
}
cib = cib_new();
do {
sleep(1);
exit_code = cib->cmds->signon(cib, crm_system_name, cib_query);
} while (exit_code == -ENOTCONN && attempts++ < max_failures);
if (exit_code != pcmk_ok) {
crm_err("Signon to CIB failed: %s", pcmk_strerror(exit_code));
}
if (exit_code == pcmk_ok) {
crm_debug("Setting dnotify");
exit_code = cib->cmds->set_connection_dnotify(cib, cib_connection_destroy);
}
crm_debug("Setting diff callback");
exit_code = cib->cmds->add_notify_callback(cib, T_CIB_DIFF_NOTIFY, cibmon_diff);
if (exit_code != pcmk_ok) {
crm_err("Failed to set %s callback: %s", T_CIB_DIFF_NOTIFY, pcmk_strerror(exit_code));
}
if (exit_code != pcmk_ok) {
crm_err("Setup failed, could not monitor CIB actions");
return -exit_code;
}
mainloop = g_main_new(FALSE);
crm_info("Starting mainloop");
g_main_run(mainloop);
crm_trace("%s exiting normally", crm_system_name);
fflush(stderr);
return -exit_code;
}
