[GRASS5] raster file history question

[Roger Bivand]

On Thu, 4 Apr 2002, Bernhard Reiter wrote:

> On Wed, Apr 03, 2002 at 06:29:37PM +0200, Markus Neteler wrote:
> > for a few modules I would like to add the feature that
> > the invoking command lines is stored into the raster file history.
> > 
> > It will be trivial, but I don't get the command line into
> > a string.
> 
> Maybe it is just me, but I don't understand the question.
> 
I think Markus has something here, but I agree it could be clearer. Is
what you were thinking of a kind of audit trail, so that one could trace
which commands had led to a given map object being in its current state in
the location? Something like appending the verbatim command line (plus the
working directory address etc.) to a file somewhere. To do that, one could
either use a daemon mechanism to harvest change data during a session, or
insert an extra function in gisinit.c or similar to grab the command line
for command line programs, or line some other way of inserting such a
function after arguments have been set interactively (more
cumbersome). I think it becomes top-heavy when the output inherits
histories from multiple parents.

Roger

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no
and: Department of Geography and Regional Development, University of
Gdansk, al. Mar. J. Pilsudskiego 46, PL-81 378 Gdynia, Poland.