add -C option to mkarchroot

    echo "    -r <app>      Run 'app' within the context of the chroot"

    echo "    -u            Update the chroot via pacman"

    echo "    -f            Force overwrite of files in the working-dir"

    echo "    -C <file>     location of a pacman config file"

    echo "    -h            This message"

    exit $1

}

while getopts 'r:ufh' arg; do

while getopts 'r:ufhC:' arg; do

    case "${arg}" in

        r) RUN="$OPTARG" ;;

        u) RUN="pacman -Syu" ;;

        f) FORCE="y" ;;

        C) pac_conf="$OPTARG" ;;

        h|?) usage 0 ;;

        *) echo "invalid argument '${arg}'"; usage 1 ;;

    esac

    # pacman takes these as relative to the given root

    pacargs="$pacargs --dbpath=/var/lib/pacman"

    pacargs="$pacargs --cachedir=/var/cache/pacman/pkg"

    if [ "$pac_conf" != "" ]; then

        pacargs="$pacargs --config=${pac_conf}"

    fi

    if [ $# -eq 0 ]; then

        echo "no packages to install"