> PS: How many things would break if we forced ioctls to _always_ pass
>
> struct foo {
> int len;
> char data[len];
> } ?
Everything would break. Remember that lots of programs use terminal
control ioctls.
So far I've seen two design ideas. One is an new 'nioctl' system call
which takes 'len' as a fourth parameter. The other is to add
'ioctl_register' and 'ioctl_unregister' to the kernel, so that the
kernel knows this information and can export it, even though the
information is not present in the API.
Michael
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