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
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);
}
}
void
crm_enable_blackbox_tracing(int nsig)
{
if(blackbox_tracing_enabled) {
blackbox_tracing_enabled = FALSE;
} else {
blackbox_tracing_enabled = TRUE;
}
crm_update_callsites();
crm_debug("Blackbox tracing is %s", blackbox_tracing_enabled?"on":"off");
}
gboolean
crm_add_logfile(const char *filename)
{
struct stat parent;
int fd = 0, rc = 0;
FILE *logfile = NULL;
char *parent_dir = NULL;
char *filename_cp;
static gboolean have_logfile = FALSE;
if (filename == NULL && have_logfile == FALSE) {
filename = "/var/log/pacemaker.log";
}
if (filename == NULL) {
return FALSE; /* Nothing to do */
}
/* Check the parent directory */
filename_cp = strdup(filename);
parent_dir = dirname(filename_cp);
rc = stat(parent_dir, &parent);
if (rc != 0) {
crm_err("Directory '%s' does not exist: logging to '%s' is disabled", parent_dir, filename);
free(filename_cp);
return FALSE;
}
free(filename_cp);
errno = 0;
logfile = fopen(filename, "a");
if(logfile == NULL) {
crm_err("%s (%d): Logging to '%s' as uid=%u, gid=%u is disabled",
pcmk_strerror(errno), errno, filename, geteuid(), getegid());
return FALSE;
}
/* Check/Set permissions if we're root */
if (geteuid() == 0) {
struct stat st;
uid_t pcmk_uid = 0;
gid_t pcmk_gid = 0;
gboolean fix = FALSE;
int logfd = fileno(logfile);
rc = fstat(logfd, &st);
if (rc < 0) {
crm_perror(LOG_WARNING, "Cannot stat %s", filename);
fclose(logfile);
return FALSE;
}
if(crm_user_lookup(CRM_DAEMON_USER, &pcmk_uid, &pcmk_gid) == 0) {
if (st.st_gid != pcmk_gid) {
/* Wrong group */
fix = TRUE;
} else if ((st.st_mode & S_IRWXG) != (S_IRGRP | S_IWGRP)) {
/* Not read/writable by the correct group */
fix = TRUE;
}
}
if (fix) {
rc = fchown(logfd, pcmk_uid, pcmk_gid);
if (rc < 0) {
crm_warn("Cannot change the ownership of %s to user %s and gid %d",
filename, CRM_DAEMON_USER, pcmk_gid);
}
rc = fchmod(logfd, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
if (rc < 0) {
crm_warn("Cannot change the mode of %s to rw-rw----", filename);
}
fprintf(logfile, "Set r/w permissions for uid=%d, gid=%d on %s\n",
pcmk_uid, pcmk_gid, filename);
if (fflush(logfile) < 0 || fsync(logfd) < 0) {
crm_err("Couldn't write out logfile: %s", filename);
}
}
}
/* Close and reopen with libqb */
fclose(logfile);
fd = qb_log_file_open(filename);
if (fd < 0) {
crm_perror(LOG_WARNING, "Couldn't send additional logging to %s", filename);
return FALSE;
}
crm_notice("Additional logging available in %s", filename);
qb_log_ctl(fd, QB_LOG_CONF_ENABLED, QB_TRUE);
/* qb_log_ctl(fd, QB_LOG_CONF_FILE_SYNC, 1); Turn on synchronous writes */
/* Enable callsites */
crm_update_callsites();
have_logfile = TRUE;
return TRUE;
}
