[GRASS-user] how to select island polygons with grass

[Christian.Strobl at dlr.de]

hi all,
principally an easy question but i have spent a few hours with google
and found nothing. is there a possibilty with grass to select island
polygons from a grass vector map, for example with arcinfo it was very
easy

Pseudocode: select Polygons from polygonLayer where leftPolygon =
rightPolygon

thanks and greetings from munich
christian

p.s. exist any possibilities to select geometries with other topological
criteria, for example dangle lines. i know that is possible to delete
them with clean but i am looking for a possibility only to select them