first_hop_cost key route
as produced by pathalias -f and converts it to the form
key route cost
as described in paths(8). On the input, the route_cost is pathalias's total cost for the route. On the output, the cost is the cost for the first segment of the route. This represents the cost, to the local host, of passing the mail to its neighbor.
The output is sorted by key in ascending order.
pathalias -f map_files | pathproc > newpaths
mv newpaths /usr/lib/uucp/paths