grass - Creating square buffer in qgis

How can I create a buffer with square ends along a line segment in qgis?

I've buffered lines using v.buffer in the GRASS plugin, but the -c option for square ends is not exposed in that interface.

Is there another way to do this with GRASS, or another tool?

Thanks!

update: I ended up using the grass qgis plugin with the "shell" module and just used the grass commands. If you want to see the results in qgis you can use the "add grass vector layer" tool.

Answer

You could use GRASS itself because it exposes the -c option.