Is there ANY way to change camera exposure from a beagle bone on linux

I need help setting the exposure on any UVC(USB Video Class) type webcam from a beagle board running linux Angstrom .
-V4L2 (video for linux 2) is a driver we've been using (Any alternate will work
- OpenCV is the vision library we're using.

We've been looking for a work around to this for around a month and have searched a plethora of sites (listing them would not help you).