Add timestamp-format day of year "%j" pattern

[mvaladas]

My logs are timestamped with a format YYYY-DDDTHH:MM:SS. Using the day of year for the date.

The timestamp-format does not currently support the strftime %j pattern.

Would it be possible to add this pattern? If I am pointed in the right direction I wouldn't mind implementing myself as submit a pull request

[tstack]

Would it be possible to add this pattern? If I am pointed in the right direction I wouldn't mind implementing myself as submit a pull request

lnav has a custom timestamp parser/formatter in here:

https://github.com/tstack/lnav/blob/master/src/ptimec.hh
https://github.com/tstack/lnav/blob/master/src/ptimec_rt.cc

So, you would have to add the new directive in there.

The tm2sec() function converts the tm struct to epoch time, so that will need to be modified to pay attention to tm_yday (if it is set).