journald: allow additional payload in server_driver_message

The code to format the iovec is shared with log.c. All call sites to
server_driver_message are changed to include the additional "MESSAGE="
part, but the new functionality is not used and change in functionality
is not expected.

iovec is preallocated, so the maximum number of messages is limited.
In server_driver_message N_IOVEC_PAYLOAD_FIELDS is currently set to 1.

New code is not oom safe, it will fail if memory cannot be allocated.
This will be fixed in subsequent commit.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/journal/journald.c b/src/journal/journald.c
index b9f5c099e1..293b788d03 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -58,7 +58,9 @@ int main(int argc, char *argv[]) {
         server_flush_dev_kmsg(&server);
 
         log_debug("systemd-journald running as pid "PID_FMT, getpid());
-        server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
+        server_driver_message(&server, SD_MESSAGE_JOURNAL_START,
+                              LOG_MESSAGE("Journal started"),
+                              NULL);
 
         for (;;) {
                 usec_t t = USEC_INFINITY, n;
@@ -109,7 +111,9 @@ int main(int argc, char *argv[]) {
         }
 
         log_debug("systemd-journald stopped as pid "PID_FMT, getpid());
-        server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
+        server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP,
+                              LOG_MESSAGE("Journal stopped"),
+                              NULL);
 
 finish:
         server_done(&server);