func (s *journald) drainJournal(logWatcher *logger.LogWatcher, config logger.ReadConfig, j *C.sd_journal, oldCursor string) string {
var msg, cursor *C.char
var length C.size_t
var stamp C.uint64_t
var priority C.int
// Walk the journal from here forward until we run out of new entries.
drain:
for {
// Try not to send a given entry twice.
if oldCursor != "" {
ccursor := C.CString(oldCursor)
defer C.free(unsafe.Pointer(ccursor))
for C.sd_journal_test_cursor(j, ccursor) > 0 {
if C.sd_journal_next(j) <= 0 {
break drain
}
}
}
// Read and send the logged message, if there is one to read.
i := C.get_message(j, &msg, &length)
if i != -C.ENOENT && i != -C.EADDRNOTAVAIL {
// Read the entry's timestamp.
if C.sd_journal_get_realtime_usec(j, &stamp) != 0 {
break
}
// Set up the time and text of the entry.
timestamp := time.Unix(int64(stamp)/1000000, (int64(stamp)%1000000)*1000)
line := append(C.GoBytes(unsafe.Pointer(msg), C.int(length)), "\n"...)
// Recover the stream name by mapping
// from the journal priority back to
// the stream that we would have
// assigned that value.
source := ""
if C.get_priority(j, &priority) != 0 {
source = ""
} else if priority == C.int(journal.PriErr) {
source = "stderr"
} else if priority == C.int(journal.PriInfo) {
source = "stdout"
}
// Send the log message.
cid := s.vars["CONTAINER_ID_FULL"]
logWatcher.Msg <- &logger.Message{ContainerID: cid, Line: line, Source: source, Timestamp: timestamp}
}
// If we're at the end of the journal, we're done (for now).
if C.sd_journal_next(j) <= 0 {
break
}
}
retCursor := ""
if C.sd_journal_get_cursor(j, &cursor) == 0 {
retCursor = C.GoString(cursor)
C.free(unsafe.Pointer(cursor))
}
return retCursor
}
func (s *journald) drainJournal(logWatcher *logger.LogWatcher, config logger.ReadConfig, j *C.sd_journal, oldCursor string) string {
var msg, data, cursor *C.char
var length C.size_t
var stamp C.uint64_t
var priority C.int
// Walk the journal from here forward until we run out of new entries.
drain:
for {
// Try not to send a given entry twice.
if oldCursor != "" {
ccursor := C.CString(oldCursor)
defer C.free(unsafe.Pointer(ccursor))
for C.sd_journal_test_cursor(j, ccursor) > 0 {
if C.sd_journal_next(j) <= 0 {
break drain
}
}
}
// Read and send the logged message, if there is one to read.
i := C.get_message(j, &msg, &length)
if i != -C.ENOENT && i != -C.EADDRNOTAVAIL {
// Read the entry's timestamp.
if C.sd_journal_get_realtime_usec(j, &stamp) != 0 {
break
}
// Set up the time and text of the entry.
timestamp := time.Unix(int64(stamp)/1000000, (int64(stamp)%1000000)*1000)
line := append(C.GoBytes(unsafe.Pointer(msg), C.int(length)), "\n"...)
// Recover the stream name by mapping
// from the journal priority back to
// the stream that we would have
// assigned that value.
source := ""
if C.get_priority(j, &priority) != 0 {
source = ""
} else if priority == C.int(journal.PriErr) {
source = "stderr"
} else if priority == C.int(journal.PriInfo) {
source = "stdout"
}
// Retrieve the values of any variables we're adding to the journal.
attrs := make(map[string]string)
C.sd_journal_restart_data(j)
for C.get_attribute_field(j, &data, &length) > C.int(0) {
kv := strings.SplitN(C.GoStringN(data, C.int(length)), "=", 2)
attrs[kv[0]] = kv[1]
}
if len(attrs) == 0 {
attrs = nil
}
// Send the log message.
logWatcher.Msg <- &logger.Message{
Line: line,
Source: source,
Timestamp: timestamp.In(time.UTC),
Attrs: attrs,
}
}
// If we're at the end of the journal, we're done (for now).
if C.sd_journal_next(j) <= 0 {
break
}
}
retCursor := ""
if C.sd_journal_get_cursor(j, &cursor) == 0 {
retCursor = C.GoString(cursor)
C.free(unsafe.Pointer(cursor))
}
return retCursor
}