#!/bin/bash 

declare -i idx= first=1

rm -rf   /local/target0/umltest
mkdir -p /local/umltest/cow
mkdir -p /local/umltest/hostfs

if (( $# < 1 )); then
    idx=1
else
    idx=$1
fi

root="/local/dbahi/root_fs.rh-9-full"
swap="/local/dbahi/swap_fs.256"
pipe="/local/umltest/pipe"

linux="/view/dmerrill_linux/ccase/linux24/src/linux"

if [[ ! -x "${linux}" ]]; then
  echo -ne "${linux}\n\nnot found or not executable!!!!\n"
  exit
fi

pause=5
mem="128M"
nice="nice"
screen="screen -DmS"
xterm="xterm -e screen -r"
tunctl="tunctl -b -u $USER"

echo -ne "\n#  Will launch $idx UML(s)...\n#\n#"
echo -ne "\n#  Launching tunctl for tap interface with command:\n#"
echo -ne "\n#     ${tunctl}\n#\n#"

tapdev=$(${tunctl})

umlxcmd="/usr/bin/uml_switch -unix ${pipe} -tap ${tapdev}"
tunrm="tunctl -d ${tapdev}"

echo -ne "\n#  Launching uml_switch with command:\n#"
echo -ne "\n#     ${screen} uml_switch -t uml_switch ${umlxcmd}\n#\n#"
echo -ne "\n#  Attaching uml_switch with command:\n#"
echo -ne "\n#     ${xterm} uml_switch\n#\n#"

${screen} uml_switch -t uml_switch ${umlxcmd} &
${xterm} uml_switch &

cur=1
while (( $cur <= $idx )); do
    umid="uml_${cur}"
    mac=$(echo "ibase=10; obase=16; ${cur}" | bc)
    ubd0cow="/local/umltest/cow/ubd0_${cur}"
    ubd1cow="/local/umltest/cow/ubd1_${cur}"
    hfsdir="/local/umltest/hostfs/host_${cur}"
    eth="daemon,fe:fd:00:00:00:${mac},unix,${pipe}"

    cmd="${nice} ${linux} umid=${umid} ubd0=${ubd0cow},${root} ubd1=${ubd1cow},${swap} hostfs=${hfsdir} mem=${mem} eth0=${eth}"

    if (( $first > 0 )); then
        first=0
        echo -ne "\n#  Launching UML with commands like:\n#"
        echo -ne "\n#     ${screen} ${umid} -t ${umid} ${cmd}\n#\n#"
        echo -ne "\n#  Attaching UML with commands like:\n#"
        echo -ne "\n#     ${xterm} ${umid}\n#\n#"
        echo -ne "\n#  Use the following to shutdown:\n\n\n"
        echo -ne "pkill uml_switch\n\n"
    fi
    echo -ne "uml_mconsole ${umid} halt"

    mkdir -p ${hfsdir}
    ${screen} ${umid} -t ${umid} ${cmd} &
    ${xterm} ${umid} &

    if (( $cur < $idx )); then
        echo -ne "    # pausing .";
        slept=0
        while (( $slept < $pause )); do
            sleep 1
            echo -ne "."
            slept=$((slept + 1))
        done
    fi
    echo -ne "\n"
    cur=$((cur + 1))
done

echo -ne "\n$tunrm\n"

echo -ne "\n\n#  Done.\n"