static int journal_get_realtime_usec (lua_State *L) {
sd_journal *j = check_journal(L, 1);
uint64_t usec;
int err = sd_journal_get_realtime_usec(j, &usec);
if (err != 0) return handle_error(L, -err);
lua_pushuint64(L, usec);
return 1;
}
static int output_timestamp_realtime(FILE *f, sd_journal *j, OutputMode mode, OutputFlags flags, const char *realtime) {
char buf[MAX(FORMAT_TIMESTAMP_MAX, 64)];
struct tm *(*gettime_r)(const time_t *, struct tm *);
struct tm tm;
uint64_t x;
time_t t;
int r;
assert(f);
assert(j);
if (realtime)
r = safe_atou64(realtime, &x);
if (!realtime || r < 0 || !VALID_REALTIME(x))
r = sd_journal_get_realtime_usec(j, &x);
if (r < 0)
return log_error_errno(r, "Failed to get realtime timestamp: %m");
if (IN_SET(mode, OUTPUT_SHORT_FULL, OUTPUT_WITH_UNIT)) {
const char *k;
if (flags & OUTPUT_UTC)
k = format_timestamp_utc(buf, sizeof(buf), x);
else
k = format_timestamp(buf, sizeof(buf), x);
if (!k) {
log_error("Failed to format timestamp: %"PRIu64, x);
return -EINVAL;
}
} else {
char usec[7];
gettime_r = (flags & OUTPUT_UTC) ? gmtime_r : localtime_r;
t = (time_t) (x / USEC_PER_SEC);
switch (mode) {
case OUTPUT_SHORT_UNIX:
xsprintf(buf, "%10"PRI_TIME".%06"PRIu64, t, x % USEC_PER_SEC);
break;
case OUTPUT_SHORT_ISO:
if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S%z", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format ISO time");
return -EINVAL;
}
break;
case OUTPUT_SHORT_ISO_PRECISE:
/* No usec in strftime, so we leave space and copy over */
if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S.xxxxxx%z", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format ISO-precise time");
return -EINVAL;
}
xsprintf(usec, "%06"PRI_USEC, x % USEC_PER_SEC);
memcpy(buf + 20, usec, 6);
break;
case OUTPUT_SHORT:
case OUTPUT_SHORT_PRECISE:
if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format syslog time");
return -EINVAL;
}
if (mode == OUTPUT_SHORT_PRECISE) {
size_t k;
assert(sizeof(buf) > strlen(buf));
k = sizeof(buf) - strlen(buf);
r = snprintf(buf + strlen(buf), k, ".%06"PRIu64, x % USEC_PER_SEC);
if (r <= 0 || (size_t) r >= k) { /* too long? */
log_error("Failed to format precise time");
return -EINVAL;
}
}
break;
default:
assert_not_reached("Unknown time format");
}
}
fputs(buf, f);
return (int) strlen(buf);
}
char *get_entry_string(){
const void *data;
json_t *message = json_object();
size_t length;
// journal meta information, prefixed by '__'
char *cursor;
uint64_t realtime_usec;
uint64_t monotonic_usec;
sd_id128_t boot_id;
/* mapping from systemd- to GELF- field names */
const char *fn_sd_host="_HOSTNAME", *fn_gelf_host="host";
const char *fn_sd_msg="MESSAGE", *fn_gelf_msg="short_message";
const char /**fn_sd_time="__REALTIME_TIMESTAMP",*/ *fn_gelf_time="timestamp";
const char *fn_sd_prio="PRIORITY", *fn_gelf_prio="level";
int rc = 0;
//add version field necessary for GELF
json_object_set_new(message, "version", json_string("1.1"));
/* get data necessary for GELF*/
rc = sd_journal_get_data(j, fn_sd_host, &data, &length);
if (!rc){
char *v = get_value(data, length);
assert(v);
json_object_set_new(message, fn_gelf_host, json_string(v));
free(v);
}
else{
json_object_set_new(message, fn_gelf_host, json_string("not_available"));
}
rc = sd_journal_get_data(j, fn_sd_msg, &data, &length);
if (!rc){
char *v = get_value(data, length);
assert(v);
json_object_set_new(message, fn_gelf_msg, json_string(v));
free(v);
}
else{
json_object_set_new(message, fn_gelf_msg, json_string("not_available"));
}
rc = sd_journal_get_data(j, fn_sd_prio, &data, &length);
if (!rc){
char *v = get_value(data, length);
assert(v);
int prio = strtol(v, NULL, 10);
if (prio<0) prio = 0;
if (prio>7) prio = 7;
//TODO: log meldung absetzen
json_object_set_new(message, fn_gelf_prio, json_integer(prio));
free(v);
}
else{
json_object_set_new(message, fn_gelf_prio, json_string("not_available"));
}
// get systemd journal meta fields cursor, realtime- and monotonic timestamp
// __REALTIME_TIMESTAMP corresponds to GELF necessary timestamp
const char *meta_prefixes[] = {"___CURSOR", fn_gelf_time , "___MONOTONIC_TIMESTAMP" };
sd_journal_get_cursor( j, &cursor ); // needs to be free'd afterwards
json_object_set_new(message, meta_prefixes[0], json_string(cursor));
free(cursor);
sd_journal_get_realtime_usec( j, &realtime_usec );
json_object_set_new(message, meta_prefixes[1], json_integer(realtime_usec));
sd_journal_get_monotonic_usec( j, &monotonic_usec, &boot_id);
json_object_set_new(message, meta_prefixes[2], json_integer(monotonic_usec));
/* get all remaining fields */
// (PRIORITY, _HOSTNAME, and MESSAGE are read again)
// format of prefixes: additional '_' for additional fields in GELF
// format of retrieved arguments: data="FIELD_NAME=field_value" length=
SD_JOURNAL_FOREACH_DATA(j, data, length){
char *v = get_value(data, length);
assert(v);
char *k = get_key(data);
assert(k);
json_object_set_new(message, k, json_string(v));
free(v);
free(k);
}
tlog_grc
tlog_journal_json_reader_read(struct tlog_json_reader *reader,
struct json_object **pobject)
{
struct tlog_journal_json_reader *journal_json_reader =
(struct tlog_journal_json_reader*)reader;
tlog_grc grc;
int sd_rc;
struct json_object *object = NULL;
/* If we ran out of time limit */
if (journal_json_reader->last > journal_json_reader->until) {
goto exit;
}
/* Advance to the next entry */
sd_rc = sd_journal_next(journal_json_reader->journal);
/* If failed */
if (sd_rc < 0) {
grc = TLOG_GRC_FROM(systemd, sd_rc);
goto cleanup;
/* If got an entry */
} else if (sd_rc > 0) {
const char *field_ptr;
size_t field_len;
const char *message_ptr;
size_t message_len;
/* Advance entry counter */
journal_json_reader->entry++;
/* Get the entry realtime timestamp */
sd_rc = sd_journal_get_realtime_usec(journal_json_reader->journal,
&journal_json_reader->last);
if (sd_rc < 0) {
grc = TLOG_GRC_FROM(systemd, sd_rc);
goto cleanup;
}
if (journal_json_reader->last > journal_json_reader->until) {
goto exit;
}
/* Get the entry message field data */
sd_rc = sd_journal_get_data(journal_json_reader->journal, "MESSAGE",
(const void **)&field_ptr, &field_len);
if (sd_rc < 0) {
grc = TLOG_GRC_FROM(systemd, sd_rc);
goto cleanup;
}
/* Extract the message */
message_ptr = (const char *)memchr(field_ptr, '=', field_len);
if (message_ptr == NULL) {
grc = TLOG_RC_FAILURE;
goto cleanup;
}
message_ptr++;
message_len = field_len - (message_ptr - field_ptr);
/* Parse the message */
object = json_tokener_parse_ex(journal_json_reader->tok,
message_ptr, message_len);
if (object == NULL) {
grc = TLOG_GRC_FROM(
json, json_tokener_get_error(journal_json_reader->tok));
goto cleanup;
}
}
exit:
*pobject = object;
object = NULL;
grc = TLOG_RC_OK;
cleanup:
json_object_put(object);
return grc;
}
/**
* Write up to size bytes to buf. Return negative on error, and number of
* bytes written otherwise. The last case is a kind of an error too.
*/
static ssize_t write_entry(char *buf, size_t size, Uploader *u) {
int r;
size_t pos = 0;
assert(size <= SSIZE_MAX);
while (true) {
switch(u->entry_state) {
case ENTRY_CURSOR: {
free(u->current_cursor);
u->current_cursor = NULL;
r = sd_journal_get_cursor(u->journal, &u->current_cursor);
if (r < 0)
return log_error_errno(r, "Failed to get cursor: %m");
r = snprintf(buf + pos, size - pos,
"__CURSOR=%s\n", u->current_cursor);
if (pos + r > size)
/* not enough space */
return pos;
u->entry_state ++;
if (pos + r == size) {
/* exactly one character short, but we don't need it */
buf[size - 1] = '\n';
return size;
}
pos += r;
} /* fall through */
case ENTRY_REALTIME: {
usec_t realtime;
r = sd_journal_get_realtime_usec(u->journal, &realtime);
if (r < 0)
return log_error_errno(r, "Failed to get realtime timestamp: %m");
r = snprintf(buf + pos, size - pos,
"__REALTIME_TIMESTAMP="USEC_FMT"\n", realtime);
if (r + pos > size)
/* not enough space */
return pos;
u->entry_state ++;
if (r + pos == size) {
/* exactly one character short, but we don't need it */
buf[size - 1] = '\n';
return size;
}
pos += r;
} /* fall through */
case ENTRY_MONOTONIC: {
usec_t monotonic;
sd_id128_t boot_id;
r = sd_journal_get_monotonic_usec(u->journal, &monotonic, &boot_id);
if (r < 0)
return log_error_errno(r, "Failed to get monotonic timestamp: %m");
r = snprintf(buf + pos, size - pos,
"__MONOTONIC_TIMESTAMP="USEC_FMT"\n", monotonic);
if (r + pos > size)
/* not enough space */
return pos;
u->entry_state ++;
if (r + pos == size) {
/* exactly one character short, but we don't need it */
buf[size - 1] = '\n';
return size;
}
pos += r;
} /* fall through */
case ENTRY_BOOT_ID: {
sd_id128_t boot_id;
char sid[33];
r = sd_journal_get_monotonic_usec(u->journal, NULL, &boot_id);
if (r < 0)
return log_error_errno(r, "Failed to get monotonic timestamp: %m");
r = snprintf(buf + pos, size - pos,
"_BOOT_ID=%s\n", sd_id128_to_string(boot_id, sid));
if (r + pos > size)
/* not enough space */
return pos;
u->entry_state ++;
if (r + pos == size) {
/* exactly one character short, but we don't need it */
buf[size - 1] = '\n';
return size;
}
pos += r;
} /* fall through */
case ENTRY_NEW_FIELD: {
u->field_pos = 0;
r = sd_journal_enumerate_data(u->journal,
&u->field_data,
&u->field_length);
if (r < 0)
return log_error_errno(r, "Failed to move to next field in entry: %m");
else if (r == 0) {
u->entry_state = ENTRY_OUTRO;
continue;
}
if (!utf8_is_printable_newline(u->field_data,
u->field_length, false)) {
u->entry_state = ENTRY_BINARY_FIELD_START;
continue;
}
u->entry_state ++;
} /* fall through */
case ENTRY_TEXT_FIELD:
case ENTRY_BINARY_FIELD: {
bool done;
size_t tocopy;
done = size - pos > u->field_length - u->field_pos;
if (done)
tocopy = u->field_length - u->field_pos;
else
tocopy = size - pos;
memcpy(buf + pos,
(char*) u->field_data + u->field_pos,
tocopy);
if (done) {
buf[pos + tocopy] = '\n';
pos += tocopy + 1;
u->entry_state = ENTRY_NEW_FIELD;
continue;
} else {
u->field_pos += tocopy;
return size;
}
}
case ENTRY_BINARY_FIELD_START: {
const char *c;
size_t len;
c = memchr(u->field_data, '=', u->field_length);
if (!c || c == u->field_data) {
log_error("Invalid field.");
return -EINVAL;
}
len = c - (const char*)u->field_data;
/* need space for label + '\n' */
if (size - pos < len + 1)
return pos;
memcpy(buf + pos, u->field_data, len);
buf[pos + len] = '\n';
pos += len + 1;
u->field_pos = len + 1;
u->entry_state ++;
} /* fall through */
case ENTRY_BINARY_FIELD_SIZE: {
uint64_t le64;
/* need space for uint64_t */
if (size - pos < 8)
return pos;
le64 = htole64(u->field_length - u->field_pos);
memcpy(buf + pos, &le64, 8);
pos += 8;
u->entry_state ++;
continue;
}
case ENTRY_OUTRO:
/* need space for '\n' */
if (size - pos < 1)
return pos;
buf[pos++] = '\n';
u->entry_state ++;
u->entries_sent ++;
return pos;
default:
assert_not_reached("WTF?");
}
}
assert_not_reached("WTF?");
}
QStringList UnitModel::getLastJrnlEntries(QString unit) const
{
QString match1, match2;
int r, jflags;
QStringList reply;
const void *data;
size_t length;
uint64_t time;
sd_journal *journal;
if (!userBus.isEmpty())
{
match1 = QString("USER_UNIT=" + unit);
jflags = (SD_JOURNAL_LOCAL_ONLY | SD_JOURNAL_CURRENT_USER);
}
else
{
match1 = QString("_SYSTEMD_UNIT=" + unit);
match2 = QString("UNIT=" + unit);
jflags = (SD_JOURNAL_LOCAL_ONLY | SD_JOURNAL_SYSTEM);
}
r = sd_journal_open(&journal, jflags);
if (r != 0)
{
qDebug() << "Failed to open journal";
return reply;
}
sd_journal_flush_matches(journal);
r = sd_journal_add_match(journal, match1.toUtf8(), 0);
if (r != 0)
return reply;
if (!match2.isEmpty())
{
sd_journal_add_disjunction(journal);
r = sd_journal_add_match(journal, match2.toUtf8(), 0);
if (r != 0)
return reply;
}
r = sd_journal_seek_tail(journal);
if (r != 0)
return reply;
// Fetch the last 5 entries
for (int i = 0; i < 5; ++i)
{
r = sd_journal_previous(journal);
if (r == 1)
{
QString line;
// Get the date and time
r = sd_journal_get_realtime_usec(journal, &time);
if (r == 0)
{
QDateTime date;
date.setMSecsSinceEpoch(time/1000);
line.append(date.toString("yyyy.MM.dd hh:mm"));
}
// Color messages according to priority
r = sd_journal_get_data(journal, "PRIORITY", &data, &length);
if (r == 0)
{
int prio = QString::fromUtf8((const char *)data, length).section('=',1).toInt();
if (prio <= 3)
line.append("<span style='color:tomato;'>");
else if (prio == 4)
line.append("<span style='color:khaki;'>");
else
line.append("<span style='color:palegreen;'>");
}
// Get the message itself
r = sd_journal_get_data(journal, "MESSAGE", &data, &length);
if (r == 0)
{
line.append(": " + QString::fromUtf8((const char *)data, length).section('=',1) + "</span>");
if (line.length() > 195)
line = QString(line.left(195) + "..." + "</span>");
reply << line;
}
}
else // previous failed, no more entries
return reply;
}
sd_journal_close(journal);
return reply;
}