ioctl() forever?

Very good question. I can't say I thought it all the way through. Maybe another inspiration could be online help output from commands that print options when you provide "-h" ... i.e. just some free-form text to be printed on screen when invoked. It's a rough cut of an idea. Definitely requires some more forethought to be useful. But, personally, I'd love to have a way to ask about the ioctl()s available for any /dev/foo and even have a tool to invoke them from the command line if it makes sense.