An umbrella script for start up qemu with bridge network support

qemu_custom

#!/bin/bash

ifconfig wlan0 down

# set up a tap interface for qemu
# USERID - uid qemu is being run under.
USERID=`whoami`
iface=`tunctl -b -u $USERID`

# generate a random mac address for the qemu nic
# shell script borrowed from user pheldens @ qemu forum
ranmac=$(echo -n DE:AD:BE:EF ; for i in `seq 1 2` ; \
do echo -n `echo ":$RANDOM$RANDOM" | cut -n -c -3` ;done)

echo "using mac address: "$ranmac

# specify which NIC to use - see qemu.org for others
model=rtl8139
# model=ne2k_isa

# start qemu with our parameters
qemu-system-x86_64 $@ -net nic,vlan=0,macaddr=$ranmac,model=$model \
        -net tap,vlan=0,ifname=$iface

# qemu has stopped - no longer using tap interface
tunctl -d $iface &> /dev/null