I am trying to get a progranm to run under the freebsd emulation
mode.   It is not working due to a call to sysctl.  I am running 1.6.2

It does something like this I am told

struct sockaddr_dl *sdl;
 struct if_msghdr *ifm, *n_ifm;
 struct ifa_msghdr *ifam;
 int mib[6] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
 size_t need_mem;
 int flags;
 char *buf, *lim, *next;

 /* We need to issue some sysctl() calls to find the interface(s) */
 if (sysctl(mib, 6, NULL, &need_mem, NULL, 0) < 0) {

which gives an error of Invaliud argument.  Any one familar enough
with this code to make a patch that can get this working?