[GRASSLIST:7591] Network accumulated values

Hi all,

I'm interested about getting accumulated node cost values(attribute of
the node) through the different paths from the outlet point of a
dendritic, arborescent network to the multiple ends of it.

This could be interesting for many purposes like getting the total
population or area served by a drainage network, ...

Maybe this could be done with some scripting using d.path...

Any ideas??

Thanks