[linux-lvm] API for retrieve lvm information

[Stanley Yue]

Hi:

I'm new to linux lvm, so sorry if this questions have been answered.

1) Is there any api library for retrieve linux lvm configuration? I.e.
querying for all the vg(s), pv(s), lv(s) on the system?

2) If yes, what license is the library release under? 

Thanks,

Stanley