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File kvm of Package kvmscript

#!/bin/sh

usage()
{
cat >&2 <<HELP
$0 [options]
Options include:
    --init              Load kernel module and prepare network
    --deinit            Unload kernel module and restore network
    --start=[lin|win]   Start guest OS which you selected
HELP
}

chkroot()
{
  if [ $EUID -ne 0 ]; then
    echo "$0 $1 needs to be run by root." >&2
    exit 1
  fi
}

getif()
{
  ip route | awk '/^default/{print $NF}'
}

getgw()
{
  ip route | awk '/^default/{print $3}'
}

check()
{
  ping -I $1 -c 3 $(getgw)
  return $?
}

init()
{
  chkroot --init

modprobe kvm-amd
  modprobe tun

iptables -I FORWARD -i $ifbr -o $ifbr -j ACCEPT
  rcnetwork stop 2>/dev/null

ip link set $ifhost up
  brctl addbr $ifbr
  brctl addif $ifbr $ifhost

tunctl -u $usr -t $iftun
  brctl addif $ifbr $iftun
  ip link set $iftun up

dhcpcd $ifbr
}

deinit()
{
  chkroot --deinit

pkill dhcpcd
  ip link set $iftun down
  ip link set $ifbr down

brctl delif $ifbr $iftun
  tunctl -d $iftun

brctl delif $ifbr $ifhost
  brctl delbr $ifbr

rcnetwork start
  iptables -D FORWARD -i $ifbr -o $ifbr -j ACCEPT

modprobe -r tun
  modprobe -r kvm-amd
}

start()
{
  local kvm='/usr/local/bin/qemu-system-x86_64'
  local kvm_opt="-boot c -localtime -m 512 -daemonize
           -net nic,macaddr=52:54:00:12:34:56 -net tap,ifname=${iftun},script=no"
  case "$1" in
    win)
      $kvm -hda img/winxp2.qcow2 -no-acpi -cdrom iso/winxp-sp2.iso $kvm_opt
      ;;
    lin)
      $kvm -hda img/sles10sp1-2.qcow2 -cdrom ../add/SLES-10-SP1-DVD-i386-GM-DVD1.iso $kvm_opt
      ;;
  esac
}

ifhost=$(getif)
iftun=tap0
ifbr=br0
usr=see
opterr=0

exec >/dev/null

if [ $# -le 0 ]; then
  opterr=1
fi

while [ $# -gt 0 -a $opterr -eq 0 ]; do
  opt="${1%%=*}"
  arg="${1#*=}"
  shift
  case "$opt" in
    --init)
      init=1
      ;;
    --deinit)
      deinit=1
      ;;
    --start)
      if [ "$arg" = "lin" -o "$arg" = "win" ]; then
        start=1
        os="$arg"
      else
        opterr=1
      fi
      ;;
    *)
      opterr=1
      ;;
  esac
done

if [ $opterr -ne 0 ]; then
  usage
  exit 1
fi

if [ -n "$init" ]; then
  init
  if ! check $ifbr; then
    echo "init failed" >&2
    exit 1
  fi
fi

if [ -n "$deinit" ]; then
  deinit
fi

if [ -n "$start" ]; then
  start $os
fi

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File kvm of Package kvmscript

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