From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Tue,  2 Sep 2014 15:10:56 -0400
To: 9fans@9fans.net
Message-ID: <6e2a7a02201fcf3ea5d0d894d0d16916@ladd.quanstro.net>
In-Reply-To: <346c54679a6cdc9bb557724d8b93bbc6@quintile.net>
References: <346c54679a6cdc9bb557724d8b93bbc6@quintile.net>
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Subject: Re: [9fans] silly question
Topicbox-Message-UUID: 14c124ec-ead9-11e9-9d60-3106f5b1d025

> Strftime is a red herring (sorry), I can use  and "date" | getline
> to generate pretty much any date string I need.
>
> The issue is more going the other way. tm2sec in awk is quite complex
> and hids many pitfalls if you want to do it correctly.
>
> My problem is parsing logfiles which contain dates in the form
> of date(1) / ctime(2).
>
> I want to graph stuff over time and so I want a monotonically incrementing
> number (secs sinc 1/1/70 would be ideal). I have coded this in awk but
> for one year leap years break - though not by much.

if the hair is just leap years, the algorithm used by /sys/src/libc/9sys/ctime.c
is pretty attractive.  the idea is to just loop through the years between given
and 1970, and add a day for each leap year encountered.  should be easy
to do in awk.

- erik