qemu

  echo "Received $1 signal, shutting down..."

  echo 0 > "${_QEMU_SHUTDOWN_COUNTER}"

  # Don't send the powerdown signal because vDSM ignores ACPI signals

  # echo 'system_powerdown' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null

  # Send shutdown command to guest agent tools instead via serial port

  RESPONSE=$(curl -s -m 2 -S http://127.0.0.1:2210/write?command=6 2>&1)

  if [[ ! "${RESPONSE}" =~ "\"success\"" ]] ; then

    echo "Could not send shutdown command to guest, error: $RESPONSE"

    FILE="${IMG}/agent.ver"

    [ ! -f "$FILE" ] && echo "1" > "$FILE"

    AGENT_VERSION=$(cat "${FILE}")

    if ((AGENT_VERSION < 2)); then

      echo "Please update the agent to allow gracefull shutdowns..."

      pkill -f qemu-system-x86_64

    else

      # Send a NMI interrupt which will be detected by the kernel

      echo 'nmi' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null

    fi

  fi

  # Send the shutdown (system_powerdown) command to the QMP monitor

  echo 'system_powerdown' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null

  while [ "$(cat ${_QEMU_SHUTDOWN_COUNTER})" -lt "${QEMU_POWERDOWN_TIMEOUT}" ]; do