how to use the function copyout()

[Matthew N. Dodd]

On Mon, 25 Jul 2005, Felix-KM wrote:
> In the Linux driver Ioctl is realized with the macroses _put_user 
> _get_user all over it. As I understand in FreeBSD their analogues are 
> functions described in store(9), copy(9) and fetch(9).

Linux doesn't provide any help for driver IOCTL routines, FreeBSD does.

Just declare your IOCTLs correctly and the kernel will perform any copy 
in/out as specified by the _IOW/_IOR/_IOWR macros.

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