snapshot status

i need to watch the status of my snapshot to prevent it from filling up. with Logical Volume Manager 1.0.3 i was able to display this information with the "lvdisplay" command by looking at the "allocated to snapshot" line and then extending the snapshot if it needed to be larger.

now with lvm2 1.95.10 (2002-05-31), the "lvdisplay" command does not have that information.

is there another lvm command i can use to watch the status of my snapshot?