About the feature: I find it is a good thing. It may help scripting over
the logs, for instance to compute delays between events, whereas the full
date-time-tz syntax is maybe nice but heavier to work with afterwards.
In addition to the comments already made (typo in doc, padding...):
+ sprintf(timestamp_str, "%ld.%.03d",
+ tv.tv_sec, (int)(tv.tv_usec / 1000));
I'm not sure that the "." in "%.03d" is useful. ISTM that it is used for
floatting point formatting, but is not needed with integers.
--
Fabien.