static int journal_process (lua_State *L) {
sd_journal *j = check_journal(L, 1);
int err = sd_journal_process(j);
if (err < 0) return handle_error(L, -err);
lua_pushinteger(L, err);
return 1;
}
int check_journal_input(Uploader *u) {
if (u->input_event) {
int r;
r = sd_journal_process(u->journal);
if (r < 0) {
log_error_errno(r, "Failed to process journal: %m");
close_journal_input(u);
return r;
}
if (r == SD_JOURNAL_NOP)
return 0;
}
return process_journal_input(u, 1);
}
void systemd_refresh(void)
{
/* Absorb any changes such as inotify() messages. */
(void) sd_journal_process(journald_context);
(void) sd_journal_process(journald_context_seeky);
while (1) {
char *cursor = NULL;
char *timestamp_str = NULL;
struct timeval timestamp;
int rc = sd_journal_next(journald_context);
if (rc == 0) /* No recent entries. */
break;
if (rc < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_next failure: %s", strerror(-rc));
break;
}
/* NB: we enqueue the journal cursor string, rather than the
actual journal records. */
rc = sd_journal_get_cursor(journald_context, &cursor);
if (rc < 0) {
__pmNotifyErr(LOG_ERR, "sd_journal_get_cursor failure: %s",
strerror(-rc));
break;
}
/* Extract a timestamp from the journald event fields. */
timestamp_str = my_sd_journal_get_data(journald_context,
"_SOURCE_REALTIME_TIMESTAMP");
if (timestamp_str == NULL)
timestamp_str = my_sd_journal_get_data(journald_context,
"__REALTIME_TIMESTAMP");
if (timestamp_str == NULL)
rc = -ENOMEM;
else {
const char* curse;
unsigned long long epoch_us;
/* defined in systemd.journal-fields(7) as
FIELD_NAME=NNNN, where NNNN is decimal us since epoch. */
curse = strchr (timestamp_str, '=');
if (curse == NULL)
rc = -EINVAL;
else {
curse ++;
epoch_us = strtoull (curse, NULL, 10);
timestamp.tv_sec = epoch_us / 1000000;
timestamp.tv_usec = epoch_us % 1000000;
}
free (timestamp_str);
}
/* Improvise. */
if (rc < 0)
gettimeofday (& timestamp, NULL);
/* Enqueue it to fresh visitors. */
rc = pmdaEventQueueAppend(queue_entries,
cursor, strlen(cursor)+1 /* \0 */, ×tamp);
free(cursor); /* Already copied. */
if (rc < 0) {
__pmNotifyErr(LOG_ERR, "pmdaEventQueueAppend failure: %s", pmErrStr(rc));
break;
}
}
}
