[ -n "$RESOLV_CONF" ] && OPTIONS="$OPTIONS -r $RESOLV_CONF"
[ -n "$DHCP_LEASE" ] && OPTIONS="$OPTIONS -l $DHCP_LEASE"
[ -n "$DOMAIN_SUFFIX" ] && OPTIONS="$OPTIONS -s $DOMAIN_SUFFIX"
[ -n "$RESOLV_CONF" ] && OPTIONS="$OPTIONS -r $RESOLV_CONF"
[ -n "$DHCP_LEASE" ] && OPTIONS="$OPTIONS -l $DHCP_LEASE"
[ -n "$DOMAIN_SUFFIX" ] && OPTIONS="$OPTIONS -s $DOMAIN_SUFFIX"