#!/bin/bash
ipv6_cmd=false
for arg in "$@"; do
    if [ "$arg" = "-6" ]; then ipv6_cmd=true; break; fi
done
if $ipv6_cmd; then
    if [ ! -d /proc/sys/net/ipv6 ]; then exit 0; fi
    /usr/sbin/ip "$@"
    status=$?
    if [ $status -eq 2 ]; then exit 0; fi
    exit $status
else
    exec /usr/sbin/ip "$@"
fi
