journal_send submits a list of KV pairs to the journal. The Key name must be in uppercase and consist only of characters, numbers and underscores, and may not begin with an underscore.

journal_send_loc acts like journal_send, but also adds the CODE_LINE and CODE_FILE location keys and values to the journal.

Compilation units must be compiled and linked with option -g

journal_send_message p s is used to submit simple, plain text log entries to the system journal. The first argument is the Priority p. This is followed by the message s

journal_send_message_loc acts like journal_send_message, but also adds the CODE_LINE and CODE_FILE location keys and values to the journal.

Compilation units must be compiled and linked with option -g