Shellcheck

    echo "docker variable to your container: --device=/dev/vhost-net" && exit 85

  fi

  VM_NET_TAP="_VmMacvtap"

  VM_NET_TAP="dsm"

  echo "Info: Retrieving IP via DHCP using MAC ${VM_NET_MAC}..."

  ip l add link eth0 name ${VM_NET_TAP} address ${VM_NET_MAC} type macvtap mode bridge || true

  ip l set ${VM_NET_TAP} up

  ip l add link eth0 name "${VM_NET_TAP}" address "${VM_NET_MAC}" type macvtap mode bridge || true

  ip l set "${VM_NET_TAP}" up

  ip a flush eth0

  ip a flush ${VM_NET_TAP}

  ip a flush "${VM_NET_TAP}"

  DHCP_IP=$( dhclient -v ${VM_NET_TAP} 2>&1 | grep ^bound | cut -d' ' -f3 )

  DHCP_IP=$( dhclient -v "${VM_NET_TAP}" 2>&1 | grep ^bound | cut -d' ' -f3 )

  if [[ "${DHCP_IP}" == [0-9.]* ]]; then

    echo "Info: Retrieved IP ${DHCP_IP} via DHCP"

    echo "ERROR: Cannot retrieve IP from DHCP using MAC ${VM_NET_MAC}" && exit 16

  fi

  ip a flush ${VM_NET_TAP}

  ip a flush "${VM_NET_TAP}"

  TAP_PATH="/dev/tap$(</sys/class/net/${VM_NET_TAP}/ifindex)"

  # create dev file (there is no udev in container: need to be done manually)

  IFS=: read MAJOR MINOR < <(cat /sys/devices/virtual/net/${VM_NET_TAP}/tap*/dev)

  IFS=: read MAJOR MINOR < <(cat "/sys/devices/virtual/net/${VM_NET_TAP}/tap*/dev")

  if (( MAJOR < 1)); then

     echo "ERROR: Cannot find: sys/devices/virtual/net/${VM_NET_TAP}" && exit 18

  [[ ! -e ${TAP_PATH} ]] && [[ -e /dev0/${TAP_PATH##*/} ]] && ln -s /dev0/${TAP_PATH##*/} ${TAP_PATH}

  if [[ ! -e ${TAP_PATH} ]]; then

    if ! mknod ${TAP_PATH} c $MAJOR $MINOR ; then

  if [[ ! -e "${TAP_PATH}" ]]; then

    if ! mknod "${TAP_PATH}" c "$MAJOR" "$MINOR" ; then

      echo "ERROR: Cannot mknod: ${TAP_PATH}" && exit 20

    fi

  fi

  if ! exec 30>>$TAP_PATH; then

  if ! exec 30>>"$TAP_PATH"; then

    echo -n "ERROR: Please add the following docker variables to your container:  "

    echo "--device=/dev/vhost-net --device-cgroup-rule='c ${MAJOR}:* rwm'" && exit 21

  fi