Re: parsing idlelog..log in Perl (was: historystats file format documentation)

Thanks for more info on this Joe!
I think I will stick to the historystat file because it contains keyboard
and mouse activity records I am interested in. Although it would be nice to
have activity log in finer granularity I can make some simplifications :)
Zdenek

2010/4/26 Joe Wells <[email protected]>

> Zdeněk Kedaj <[email protected]> writes:
>
> > 2010/4/25 Joe Wells <[email protected]>
> >
> >     Sorry for being confusing.  The information you want is in the
> >     “idlelog..log” file.  If you look for earlier postings on this
> mailing
> >     list, you can find programs that process this data.
> >
> > Hm, but this file is in binary format which is quite hard to parse. Does
> it
> > contain any more data than the historystats file?
>
> It contains the start and stop time of each idle interval.
>
> I remember posting Perl code that would parse it.  The format is not
> complicated.  Each record is fixed length, and each field is a fixed
> size at a fixed offset within each record.  Here is the relevant Perl
> code that unpacks the entire file:
>
>  # C: unsigned 8-bit integer (“c” is for “char”)
>  # n: unsigned 16-bit integer in big-endian order (“n” is for “network”
> order)
>  # N: unsigned 32-bit integer in big-endian order
>
>  # 17 bytes total
>  my $IdleLogRecordFormat = '
>   n # size (should always be 15, encoded in bytes as 0 followed by 15)
>   C # format version (should always be 2, encoded as the byte 2)
>   N # begin time
>   N # end idle time
>   N # end time
>   n # active time
>  ';
>
>  ...
>
>  my $contents = get_file_contents ($file); # grab entire file as a single
> string
>  my @all_record_fields = unpack ("($IdleLogRecordFormat)*", $contents);
>
> After this code runs, each record takes 6 consecutive slots in
> @all_record_fields.
>
> I hope this helps.
>
> --
> Joe
>
>
> --
> Heriot-Watt University is a Scottish charity
> registered under charity number SC000278.
>
>

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