A draft API on sndstat IOCTLs

[Ka Ho Ng]

Hi all,

I have proposed a draft API on sndstat IOCTLs. The IOCTL commands are
nvlist-based,
and the goal of these IOCTLs aims at eliminating text parsing as a generic
user space API.
Here is the link to the differential: https://reviews.freebsd.org/D26884. A
piece of sample code
is also provided to demonstrate the usage of the IOCTLs.

Regards,
Ka Ho