Alan Jenkins
fe16729868
Let the journal capture messages emitted by systemd, before it ran
exec("/usr/lib/systemd/systemd-journald"). Usually such messages will only
appear with `systemd.log_level=debug`. kmsg lines written after the exec()
will be ignored as before.
In other words, we are avoiding reading our own lines, which start
"systemd-journald[100]: " assuming we are PID 100. But now we will start
allowing ourself to read lines which start "systemd[100]: ", or any other
prefix which is not "systemd-journald[100]: ".
So this can't help you see messages when we fail to exec() journald :). But,
it makes it easier to see what the pre-exec() messages look like in
the successful case. Comparing messages like this can be useful when
debugging. Noticing weird omissions of messages, otoh, makes me anxious.
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