On 16 February 2013 00:42, matteo poletti <[email protected]> wrote: >> Da: Hamish <[email protected]> > >> have a look at the functions in lib/gis/spawn.c. > > Ok, so if I got it right I need to do a sys call exec. What do you usually do > for reading the module's output? > I hope this will help:
http://stackoverflow.com/questions/478898/how-to-execute-a-command-and-get-output-of-command-within-c If you are using some framework such as Qt, you can use the way used in this framework. > I suppose that, doing the things this way, I'll need to run my program inside > a grass shell to have it working. Yes, you always need to run your program (which uses lib or modules) in grass session. Your program is in fact a grass module. However, there is an alternative -- to set up some environment variables (most recently discussed in thread "Bash aliases in GRASS"). http://grasswiki.osgeo.org/wiki/Working_with_GRASS_without_starting_it_explicitly > > Do I need the "extern" keyword in this case? I guess not since I'm doing a > sys call. Exactly, "extern" is necessary to properly include function declarations. Best, Vaclav BTW, I would ask this question on grass-dev. For me, it is more developer than user question because of C++. > > Maybe I've misunderstood the example... > Thanks! > Matteo > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
