#!/bin/bash
set -x
set -e

# Create macvlan interface on Docker's eth0
ip link add link eth0 name macvtap0 type macvtap mode bridge
ip link set dev macvtap0 address ${MAC:?}
ip link set macvtap0 up

# No udev in Docker
IFS=: read major minor < <(cat /sys/devices/virtual/net/macvtap0/tap*/dev)
DEV=/dev/tap$(cat /sys/class/net/macvtap0/ifindex)
rm -fv $DEV
mknod $DEV c $major $minor

# Launch QEMU instance
/usr/bin/qemu-system-x86_64 \
  -machine pc-i440fx-4.2,accel=kvm \
  -m 8192 \
  -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x6 \
  -device virtio-net-pci,netdev=hostnet0,id=net0,mac=$MAC \
  -device virtio-balloon-pci \
  -drive if=none,id=hd,file=/data/image.bin,snapshot=on,format=raw \
  -device scsi-hd,drive=hd \
  -usb \
  -device usb-ehci,id=ehci                         \
  -device usb-tablet,bus=usb-bus.0 \
  -vnc :0 \
  -netdev tap,id=hostnet0,vhost=on,fd=9 9<>$DEV