On Mit, 2008-06-18 at 14:29 +0200, Belisko Marek wrote:
> Hi,
>
> How to pass an array of char via ioctl (not via write method ) to
> kernel from user space?
> I define unigue IOCTL cmd
>
> #define LED_SET_STATE _IOW(LED_MAGIC,1, leds)
>
> and leds should be an array from userspace.
In the ioctl() handler, you get the address and you can copy the users
data with copy_from_user() into a buffer.
For portability, keep in mind that "int" is 32 or 64 bit and that there
are big and little endian machines.
Bernd
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