Guy Decoux wrote:
> A Sussex wrote:
>> I'm attempting to read the address assigned to an interface. After
>> calling ioctl(SIOCGIFADDR) - which is 0x8915 on my system - I find
>> that the destination buffer is corrupted and contains random garbage.
>
>  Well, on linux it can't know the size of the argument given to
>  ioctl(2) and for this reason it give it to ioctl() an argument with
>  a default length of (256 + 1). This is why you see that buf has a
>  size of 257 after the call to #ioctl.
>
>  You must use only the valid part of buf after the call.

So I guess I'm seeing bits of irb's memory because the extended part
of buf isn't initialised before use. (Please correct me if I'm wrong.)

Thanks for your help.