runfoo

#!/bin/bash

die() { echo "$*"; exit 1; }

QEMU_BIN=${QEMU_BIN:-qemu-system-i386}
DISPLAY_OPTS=${DISPLAY_OPTS:--nographic}
DISABLE_KVM=${DISABLE_KVM:-}

[ "${1}" ] || die "Usage: $0 PROG [ARG...]"

case ${FOO_MODE:-qemu} in
    qemu)
        (
            sleep 0.1
            tries=0
            while ! exec 3<> /dev/tcp/localhost/21118; do
                sleep 0.5
                tries=$(( tries + 1 ))
                [ "${tries}" -gt 10 ] && die "Could not connect to qemu"
            done
            while read -u 3 -r cmd arg1; do
                case ${cmd} in
                read:)
                    if [ -r "${arg1}" ]; then
                        echo "fdata: $(stat --printf="%s" ${arg1})" >&3
                        cat >&3 ${arg1}
                    else
                        echo "error: Could not read file ${arg1}" >&3
                    fi
                    ;;
                size:)
                    if [ -r "${arg1}" ]; then
                        echo "fdata: $(stat --printf="%s" ${arg1})" >&3
                    else
                        echo "error: Could not stat file ${arg1}" >&3
                    fi
                    ;;
                *)
                    echo >&2 "Unknown socket command: $cmd"
                    ;;
                esac
            done
        ) &
        bin=$1; shift
        opts="${DISPLAY_OPTS}"
        [ "${DISABLE_KVM}" ] || opts="${opts} --enable-kvm"
        [ "${GDB}" ] && opts="${opts} -s -S"
        set -x
        ${QEMU_BIN} \
            ${opts} \
            -monitor none \
            -serial stdio \
            -serial tcp:localhost:21118,server \
            -device isa-debug-exit,iobase=0xf4,iosize=0x04 \
            -kernel ${bin} \
            ${@:+-append "${*}"}
        exit $(( $? / 2 ))
        ;;
    *)
        $1 "${@}"
        ;;
esac