POSTIN

/bin/sh

if [ $1 = 1 ]; then
   # ipv4 by default, as explained on the webpage
    [ -f /etc/sysconfig/network ] && source /etc/sysconfig/network
    unset hosts
    eval $(grep ^hosts: /etc/nsswitch.conf|sed -e 's/hosts:\(.*\)$/hosts=\"\1\"/')
    if [ "${NETWORKING_IPV6}" = "yes" ]; then
        # for both ipv6 and ipv4
	minimal_nss=mdns_minimal
	dns_nss=mdns
    else
        minimal_nss=mdns4_minimal
	dns_nss=mdns4
    fi
    new_hosts=$minimal_nss

    for i in $hosts; do
        if [ $i != mdns4_minimal ] && [ $i != mdns_minimal ] && [ $i != mdns4 ] && [ $i != mdns ]; then
            if [ -n "$new_hosts" ]; then
                new_hosts="$new_hosts $i"
            else
                new_hosts="$i"
            fi
            if [ $i = dns ] && [ -n "$dns_nss" ]; then
                new_hosts="$new_hosts $dns_nss"
            fi
        fi
    done
    sed -i -e "s/^hosts:.*$/hosts:\t\t$new_hosts/" /etc/nsswitch.conf
fi

POSTUN

/bin/sh

if [ $1 = 0 ]; then
    unset hosts
    eval $(grep ^hosts: /etc/nsswitch.conf|sed -e 's/hosts:\(.*\)$/hosts=\"\1\"/')

    for i in $hosts; do
        if [ $i != mdns4_minimal ] && [ $i != mdns_minimal ] && [ $i != mdns4 ] && [ $i != mdns ]; then
            if [ -n "$new_hosts" ]; then
                new_hosts="$new_hosts $i"
            else
                new_hosts="$i"
            fi
            if [ $i = dns ] && [ -n "$dns_nss" ]; then
                new_hosts="$new_hosts $dns_nss"
            fi
        fi
    done
    sed -i -e "s/^hosts:.*$/hosts:\t\t$new_hosts/" /etc/nsswitch.conf
fi