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Signed-off-by: Gergely Nagy <algernon@balabit.hu>
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Signed-off-by: Gergely Nagy <algernon@balabit.hu>
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Signed-off-by: Gergely Nagy <algernon@balabit.hu>
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The identity, as set by the first argument to openlog() can be cached
away, and later used as the program name (that's pretty much how
syslogds treat it, too), so add it to the list of automatically
discovered fields.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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Since we'd like to avoid doing useless work during logging, wrap
setlogmask() too, and save the mask set, so during _cee_vsyslog(), we
can bail out early, if our priority is not set in the mask.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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When LOG_CEE_NODISCOVER is set during openlog(), then don't do any
discovery, not even when the value is cached. When _NOCACHE is set,
then do not use the cached values for properties that can change
during runtime, and their new value can be detected at runtime too.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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Changed the API, so that we have cee_(v)syslog(), which is the
enhanced syslog API, that takes key-value pairs in addition to the
traditional message, and outputs CEE-JSON to syslog.
We also have (v)syslog() overrides, that do the same, just without the
extra key-value pairs.
Both of these add some extra stuff, via _cee_discover(): at the
moment, this is the facility, the priority and the pid.
We also override openlog(), that stores some info in thread-local
storage. That info is used by _cee_discover().
For future use, this patch also defines LOG_CEE_NODISCOVER and
LOG_CEE_NOCACHE. They're not used anywhere yet, though.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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I want to be able to modify the JSON from different functions, so that
they can build on each other. For this to work, I need to be able to
append to it, so I lifted it out into a separate function instead.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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We will override syslog() and vsyslog() with other functions, remove
the current aliases for now.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
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The formatting itself is now lifted out to _cee_vformat(), which
returns a const char *, and puts the JSON object into its first
(output) parameter.
We then export cee_format() and cee_vformat(), that use this, strdup
and return the result, and free the JSON object too.
cee_vsyslog() was changed to use _cee_vformat(), because it does not
need to strdup() the result.
Signed-off-by: Gergely Nagy <algernon@balabit.hu>
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