On Thu, Jul 28, 2005 at 12:50:20PM -0700, David S. Miller wrote:
> Netlink uses this kind of thing a lot, but not too much ethtool
> stuff does. But something like:
>
> struct ethtool_perm_addr {
> unsigned int cmd;
> int size;
> char data[0];
> };
>
> and the user says how large his buffer is in the request,
> and if that is not large enough you return -ETOOBIG or
> some similarly discernable error code so that userspace
> can allocate a larger buffer. In fact, the kernel can
> rewrite the "size" field in this case to indicate how
> large the buffer needs to be to hold the full address.
Thanks, Dave. Looks great!
Jon, you have your assignment... :-)
John
--
John W. Linville
[EMAIL PROTECTED]
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