Split mkarchiso and configs into logical parts

Signed-off-by: Aaron Griffin <aaronmgriffin@gmail.com>

11 files changed, 608 insertions, 0 deletions

diff --git a/archiso/Makefile b/archiso/Makefile
new file mode 100644
index 0000000..72abd11
--- /dev/null
+++ b/archiso/Makefile
@@ -0,0 +1,20 @@
+all:
+
+install: all
+	# install to sbin since script only usable by root
+	mkdir -p $(DESTDIR)/usr/sbin
+	install -m 755 mkarchiso $(DESTDIR)/usr/sbin
+	install -m 755 mkusbimg $(DESTDIR)/usr/sbin
+	# testiso can be used by anyone
+	mkdir -p $(DESTDIR)/usr/bin
+	install -m 755 testiso $(DESTDIR)/usr/bin
+	# hooks/install are needed by mkinitcpio
+	mkdir -p $(DESTDIR)/lib/initcpio/{hooks,install}
+	install -m 644 hooks/{archiso,boot-cd,boot-usb} $(DESTDIR)/lib/initcpio/hooks/
+	install -m 644 install/{archiso,boot-cd,boot-usb} $(DESTDIR)/lib/initcpio/install/
+
+uninstall:
+	rm -f $(DESTDIR)/usr/sbin/mkarchiso
+	rm -f $(DESTDIR)/usr/bin/testiso
+	rm -f $(DESTDIR)/lib/initcpio/hooks/{archiso,boot-cd,boot-usb}
+	rm -f $(DESTDIR)/lib/initcpio/install/{archiso,boot-cd,boot-usb}
diff --git a/archiso/gen_grubscan b/archiso/gen_grubscan
new file mode 100644
index 0000000..a2ac4df
--- /dev/null
+++ b/archiso/gen_grubscan
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+count=0
+fallback=""
+for hd in $(seq 0 3); do
+    for part in $(seq 0 17); do
+        count=$(($count + 1))
+        fallback="${fallback} ${count}"
+    done
+done
+
+echo "timeout 0"
+echo "default 0"
+echo "fallback ${fallback}"
+echo "color light-blue/blue black/light-grey"
+echo "splashimage=/boot/splash.xpm.gz"
+echo ""
+
+for hd in $(seq 0 3); do
+    for part in $(seq 0 17); do
+        echo "title Testing disk ${hd}, partition ${part}"
+        echo "set scan_dev=(hd${hd},${part})"
+        echo "fexists \$(scan_dev)/boot/grub/menu.lst"
+        echo "configfile \$(scan_dev)/boot/grub/menu.lst"
+        echo ""
+    done
+done
+
+echo "title Failed"
+echo "pause Scanning for installed grub failed"
diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso
new file mode 100644
index 0000000..8a6b648
--- /dev/null
+++ b/archiso/hooks/archiso
@@ -0,0 +1,97 @@
+# args: source, mountpoint
+_mnt_bind()
+{
+    msg "::: Binding ${1} to ${2}"
+    mkdir -p /real_root${2}
+    /bin/mount -o bind ${addon_dir}/${1} /real_root${2}
+}
+
+# args: image file
+_mnt_squashfs()
+{
+    msg "::: Adding new union branch: ${1}"
+    /bin/modprobe -q loop >/dev/null 2>&1
+    mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
+    if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${1} > /dev/null 2>&1; then
+        echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
+        echo "       Couldn't mount all addons"
+        break
+    fi
+    /bin/mount -r -t squashfs "/dev/loop${LOOP_NUM}" "/tmpfs/mnt/loop${LOOP_NUM}"
+    /bin/mount -t unionfs -o remount,add=:/tmpfs/mnt/loop${LOOP_NUM}=ro none "/real_root"
+    export LOOP_NUM=$(( $LOOP_NUM + 1 ))
+}
+
+run_hook ()
+{
+    if [ "x${ramdisk_size}" = "x" ]; then
+        ramdisk_size="75%"
+    fi
+    msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
+	mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
+    msg "done."
+
+    if [ "x${BOOT_MOUNT}" = "x" ]; then
+        echo "ERROR: BOOT_MOUNT is not set. The boot-cd or boot-usb hook MUST"
+        echo "       be run before this one.  This image was improperly built"
+        exit 1
+    fi
+
+    base_img="${BOOT_MOUNT}/archlive.sqfs"
+    if [ "${copytoram}" = "y" ]; then
+        msg ":: Copying squashfs image to RAM"
+        /bin/cat ${base_img} > /tmpfs/archlive.sqfs
+        base_img="/tmpfs/archlive.sqfs"
+    fi
+
+    msg ":: Mounting squashfs image"
+    /bin/modprobe -q squashfs >/dev/null 2>&1
+
+    msg ":: Mounting root (union) filesystem"
+    /bin/modprobe -q unionfs >/dev/null 2>&1
+    /bin/mount -t unionfs -o dirs=/tmpfs=rw none /real_root
+
+    export LOOP_NUM="0"
+    addon_dir="${BOOT_MOUNT}/addons"
+
+    # always layer default configuration
+    _mnt_squashfs "${addon_dir}/default-config.sqfs"
+
+    if [ -e "${addon_dir}/config" ]; then
+        msg ":: Mounting addons"
+        while read img mountpoint type; do
+            # check if this line is a comment (starts with #)
+            [ "${img#"#"}" != "${img}" ] && continue
+
+            if [ "${type}" = "bind" ]; then
+                _mnt_bind ${img} ${mountpoint}
+            elif [ "${type}" = "squashfs" ]; then
+                _mnt_squashfs "${addon_dir}/${img}"
+            fi
+        done < ${addon_dir}/config
+    fi
+
+    # layer the "pristine" base system image last
+    _mnt_squashfs ${base_img}
+
+    if [ -d /proc/sys/dev/cdrom ]; then
+        echo 0 > /proc/sys/dev/cdrom/lock
+        echo 0 > /proc/sys/dev/cdrom/autoeject
+    fi
+
+    if [ "${break}" = "y" ]; then
+        echo ":: Break requested, type 'exit' to resume operation"
+        echo "   NOTE: klibc contains no 'ls' binary, use 'echo *' instead"
+        PS1="ramfs$ " /bin/sh -i
+    fi
+
+    udevpid=$(/bin/minips -C udevd -o pid=)
+    [ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid 2>&1 >/dev/null
+    #Yep, we're bailing out here.  We don't need kinit.
+    msg ":: Passing control to Archlinux Initscripts...Please Wait"
+    /bin/umount /sys
+    /bin/umount /proc
+    exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/hooks/boot-cd b/archiso/hooks/boot-cd
new file mode 100644
index 0000000..1670c6b
--- /dev/null
+++ b/archiso/hooks/boot-cd
@@ -0,0 +1,37 @@
+run_hook ()
+{
+    # external drives may need to settle
+    msg ":: Waiting for usb devices to settle..."
+    /sbin/udevtrigger --subsystem-match=usb
+    /sbin/udevsettle
+    sleep 5
+
+    msg ":: Scanning for boot cdrom device..."
+
+    /bin/mkdir -p /bootmnt
+    bootmnt="/bootmnt"
+    found=0
+
+    /bin/modprobe -q isofs >/dev/null 2>&1
+    for cdrom in /dev/cd/*; do
+        if mount -r -t iso9660 "${cdrom}" ${bootmnt} >/dev/null 2>&1; then
+            if [ -e "${bootmnt}/archlive.sqfs" ]; then
+                found=1
+                msg "${cdrom}"
+                break
+            fi
+        else
+            echo "Failed to mount ${cdrom}"
+        fi
+        [ ${found} -eq 0 ] && umount ${bootmnt} >/dev/null 2>&1
+    done
+
+    if [ ${found} -eq 0 ]; then
+        echo "ERROR: cannot find booted cdrom device, cannot continue..."
+        exit 1
+    else
+        export BOOT_MOUNT="${bootmnt}"
+    fi
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/hooks/boot-usb b/archiso/hooks/boot-usb
new file mode 100644
index 0000000..e84dd1c
--- /dev/null
+++ b/archiso/hooks/boot-usb
@@ -0,0 +1,35 @@
+run_hook ()
+{
+    msg ":: Waiting for usb devices to settle..."
+    /sbin/udevtrigger --subsystem-match=usb
+    /sbin/udevsettle
+    sleep 5
+    msg ":: Scanning for boot usb device..."
+
+    /bin/mkdir -p /bootmnt
+    bootmnt="/bootmnt"
+    found=0
+
+    for usb in /dev/sd[a-z][0-9]; do
+        if mount -r -t vfat "${usb}" ${bootmnt} >/dev/null 2>&1 ||\
+            mount -r -t ext2 "${usb}" ${bootmnt} >/dev/null 2>&1; then
+            if [ -e "${bootmnt}/archlive.sqfs" ]; then
+                found=1
+                msg "${usb}"
+                break
+            fi
+        else
+            echo "Failed to mount ${usb}"
+        fi
+        [ ${found} -eq 0 ] && umount ${bootmnt} >/dev/null 2>&1
+    done
+
+    if [ ${found} -eq 0 ]; then
+        echo "ERROR: cannot find booted usb device, cannot continue..."
+        exit 1
+    else
+        export BOOT_MOUNT="${bootmnt}"
+    fi
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/install/archiso b/archiso/install/archiso
new file mode 100644
index 0000000..7b58831
--- /dev/null
+++ b/archiso/install/archiso
@@ -0,0 +1,11 @@
+install ()
+{
+    MODULES="cdrom ide-cd_mod ide-core ide-generic unionfs squashfs isofs loop $(all_modules '/kernel/fs' | grep -v "nls") "
+    BINARIES=""
+    FILES=""
+    add_dir /real_root
+    add_dir /tmpfs
+    SCRIPT="archiso"
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/install/boot-cd b/archiso/install/boot-cd
new file mode 100644
index 0000000..2d96869
--- /dev/null
+++ b/archiso/install/boot-cd
@@ -0,0 +1,17 @@
+install ()
+{
+    MODULES="cdrom ide-cd_mod ide-core ide-generic unionfs squashfs isofs $(all_modules '/kernel/fs' | grep -v "nls") "
+
+    # need usb modules for external drives
+    MODULES="${MODULES} $(checked_modules "/usb/host" | grep -ve "_cs" -e "sl1811-hcd" -e "isp116x-hcd")"
+    MODULES=$(echo ${MODULES}) #trim whitespace
+    if [ "x${MODULES}" != "x" ]; then
+        MODULES="${MODULES} usb_storage sd_mod sr_mod"
+    fi
+
+    BINARIES=""
+    FILES=""
+    SCRIPT="boot-cd"
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/install/boot-usb b/archiso/install/boot-usb
new file mode 100644
index 0000000..32d451f
--- /dev/null
+++ b/archiso/install/boot-usb
@@ -0,0 +1,16 @@
+install ()
+{
+    MODULES="cdrom ide-cd_mod ide-core ide-generic unionfs squashfs $(all_modules '/kernel/fs' | grep -v "nls") "
+
+    MODULES="${MODULES} $(checked_modules "/usb/host" | grep -ve "_cs" -e "sl1811-hcd" -e "isp116x-hcd")"
+
+    MODULES=$(echo ${MODULES}) #trim whitespace
+    if [ "x${MODULES}" != "x" ]; then
+        MODULES="${MODULES} usb_storage sd_mod sr_mod"
+    fi
+    BINARIES=""
+    FILES=""
+    SCRIPT="boot-usb"
+}
+
+# vim:ft=sh:ts=4:sw=4:et:
diff --git a/archiso/mkarchiso b/archiso/mkarchiso
new file mode 100755
index 0000000..52087fa
--- /dev/null
+++ b/archiso/mkarchiso
@@ -0,0 +1,260 @@
+#!/bin/bash
+
+CPIOCONFIG="$(pwd)/archiso-mkinitcpio.conf"
+DEF_CONFIG_DIR="$(pwd)/default-config"
+PKGFILE="$(pwd)/packages.list"
+PKGLIST=""
+QUIET="y"
+FORCE="n"
+ADDON_DIR=""
+
+command_name=""
+work_dir=""
+imgname=""
+
+APPNAME=$(basename "${0}")
+
+# usage: usage <exitvalue>
+usage ()
+{
+    echo "usage ${APPNAME} [options] command <command options>"
+    echo " general options:"
+    echo "    -f               Force overwrite of working files/squashfs image/bootable image"
+    echo "    -i CPIO_CONFIG   Use CONFIG file for mkinitcpio. default: ${CPIOCONFIG}"
+    echo "    -P PKGFILE       File with list of packages to install. default: ${PKGFILE}"
+    echo "    -p PACKAGE       Additional package to install, can be used multiple times"
+    echo "    -a ADDON_DIR     Use addons from DIR. default: none"
+    echo "    -t <iso,disk>    Type of image to create. Defaults to iso."
+    echo "    -v               Enable verbose output."
+    echo "    -h               This message."
+    echo " commands:"
+    echo " install <working dir>        : where to build the image root"
+    echo " squash <working dir>         : generate a squashfs image of the installed root"
+    echo " img <working dir> <image name> : build an image from the working directory"
+    echo " all <working dir> <image name> : perform all of the above, in order"
+    exit $1
+}
+
+while getopts 'i:P:p:a:t:fvh' arg; do
+    case "${arg}" in
+        i) CPIOCONFIG="${OPTARG}" ;;
+        P) PKGFILE="${OPTARG}" ;;
+        p) PKGLIST="${PKGLIST} ${OPTARG}" ;;
+        a) ADDON_DIR="${OPTARG}" ;;
+        t) IMG_TYPE="${OPTARG}" ;;
+        f) FORCE="y" ;;
+        v) QUIET="n" ;;
+        h|?) usage 0 ;;
+        *) echo "invalid argument '${arg}'"; usage 1 ;;
+    esac
+done
+
+shift $(($OPTIND - 1))
+echo "ARGS: $@"
+
+[ $# -le 1 ] && usage 1
+
+# do UID checking here so someone can at least get usage instructions
+if [ "$EUID" != "0" ]; then
+    echo "error: This script must be run as root."
+    exit 1
+fi
+
+command_name="${1}"
+case "${command_name}" in
+    install) work_dir="${2}" ;;
+    squash) work_dir="${2}" ;;
+    img) work_dir="${2}"; imgname="${3}" ;;
+    all) work_dir="${2}"; imgname="${3}" ;;
+    *) echo "invalid command name '${command_name}'"; usage 1 ;;
+esac
+
+[ "x${work_dir}" = "x" ] && (echo "please specify a working directory" && usage 1)
+
+imgroot="${work_dir}/img"
+instroot="${work_dir}/install"
+
+_kversion ()
+{
+    source ${instroot}/etc/mkinitcpio.d/kernel26.kver
+    echo ${ALL_kver}
+}
+
+# usage: _pacman <packages>...
+_pacman ()
+{
+    local ret
+    if [ "${QUIET}" = "y" ]; then
+        mkarchroot -f ${instroot} $* 2>&1 >/dev/null
+        ret=$?
+    else
+        mkarchroot -f ${instroot} $*
+        ret=$?
+    fi
+    if [ $ret -ne 0 ]; then
+        exit 1
+    fi
+}
+
+# usage: install_pkgfile <packagesfile>
+install_pkgfile ()
+{
+    if [ -e "${1}" ]; then
+        toinstall=""
+        while read pkg; do
+            toinstall="${toinstall} ${pkg}"
+        done < ${1}
+        _pacman "${toinstall}"
+    else
+        echo "error: Package file '${1}' does not exist, aborting."
+        exit 1
+    fi
+}
+
+# Go through the main commands in order. If 'all' was specified, then we want
+# to do everything. Start with 'install'.
+if [ "${command_name}" = "install" -o "${command_name}" = "all" ]; then
+    echo "====> Installing/building image root"
+    if [ -e "${work_dir}" -a "${FORCE}" = "n" ]; then
+        echo "error: Working dir '${work_dir}' already exists, aborting."
+        exit 1
+    fi
+
+    mkdir -p "${imgroot}"
+    mkdir -p "${instroot}"
+
+    echo "Installing packages..."
+    echo " Installing packages from '${PKGFILE}'"
+    install_pkgfile "${PKGFILE}"
+
+    for pkg in ${PKGLIST}; do
+        echo "   Installing package '${pkg}'"
+        _pacman "${pkg}"
+    done
+
+    echo "Updating kernel module dependencies"
+    kernelver=$(_kversion)
+    depmod -a -b "${instroot}" "${kernelver}"
+    # remove the initcpio images that were generated for the host system
+    find "${instroot}/boot" -name *.img -delete
+
+    echo "Creating default home directory"
+    install -d -o1000 -g100 -m0755 "${instroot}/home/arch"
+
+    # Cleanup
+    echo "Cleaning up image root files..."
+    find "${instroot}" -name *.pacnew -name *.pacsave -name *.pacorig -delete
+
+    # delete a lot of unnecessary cache/log files
+    kill_dirs="var/abs var/cache/man var/cache/pacman var/log/* var/mail tmp/* initrd"
+    for x in ${kill_dirs}; do
+        if [ -e "${instroot}/${x}" ]; then
+            rm -rf "${instroot}/${x}"
+        fi
+    done
+
+    # pacman DBs are big, delete all sync dbs
+    rm -rf "${instroot}/var/lib/pacman/sync"
+
+    # copy over kernel and grub configs for boot
+    if [ -e "${instroot}/boot" -a -e "${DEF_CONFIG_DIR}/boot" ]; then
+        rm -rf "${imgroot}/boot"
+        cp -r "${instroot}/boot" "${imgroot}"
+        cp -rf "${DEF_CONFIG_DIR}/boot" "${imgroot}"
+    fi
+
+    # TODO: this might belong somewhere else
+    mkdir -p "${imgroot}/addons"
+    if [ -d "${ADDON_DIR}" ]; then
+        echo "Copying addons from ${ADDON_DIR}..."
+        cp -r ${ADDON_DIR}/* "${imgroot}/addons"
+    fi
+
+    # always make an addon out of DEF_CONFIG_DIR
+    echo "Creating default-config addon..."
+    if [ "${QUIET}" = "y" ]; then
+        mksquashfs "${DEF_CONFIG_DIR}" "${imgroot}/addons/default-config.sqfs" -noappend >/dev/null
+    else
+        mksquashfs "${DEF_CONFIG_DIR}" "${imgroot}/addons/default-config.sqfs" -noappend
+    fi
+fi
+
+# Squash is the next step.
+if [ "${command_name}" = "squash" -o "${command_name}" = "all" ]; then
+    echo "====> Generating SquashFS image"
+    imagename="${imgroot}/archlive.sqfs"
+    if [ -e "${imagename}" ]; then
+        if [ "${FORCE}" = "y" ]; then
+            echo -n "Removing old SquashFS image..."
+            rm "${imagename}"
+            echo "done."
+        else
+            echo "error: SquashFS image '${imagename}' already exists, aborting."
+            exit 1
+        fi
+    fi
+
+    echo "Creating squashfs image. This may take some time..."
+    start=$(date +%s)
+    if [ "${QUIET}" = "y" ]; then
+        mksquashfs "${instroot}" "${imagename}" -noappend >/dev/null
+    else
+        mksquashfs "${instroot}" "${imagename}" -noappend
+    fi
+    minutes=$(echo $start $(date +%s) | awk '{ printf "%0.2f",($2-$1)/60 }')
+    echo "Image creation done in $minutes minutes."
+fi
+
+# Finally, make the image.
+if [ "${command_name}" = "img" -o "${command_name}" = "all" ]; then
+    echo "====> Making bootable image"
+    [ "x${imgname}" = "x" ] && (echo "Bootable image name must be specified" && usage 1)
+    if [ -e "${imgname}" ]; then
+        if [ "${FORCE}" = "y" ]; then
+            echo "Removing existing bootable image..."
+            rm -rf "${imgname}"
+        else
+            echo "error: Image '${imgname}' already exists, aborting."
+            exit 1
+        fi
+    fi
+    if [ ! -e "${CPIOCONFIG}" ]; then
+        echo "error: mkinitcpio config '${CPIOCONFIG}' does not exist, aborting."
+        exit 1
+    fi
+
+    kernelver=$(_kversion)
+    basedir=${instroot}
+    [ "${instroot:0:1}" != "/" ] && basedir="$(pwd)/${instroot}"
+    echo "Generating initcpio for image..."
+    if [ "${QUIET}" = "y" ]; then
+        mkinitcpio -c "${CPIOCONFIG}" -b "${basedir}" -k "${kernelver}" -g "${imgroot}/boot/archlive.img" >/dev/null
+        ret=$?
+    else
+        mkinitcpio -c "${CPIOCONFIG}" -b "${basedir}" -k "${kernelver}" -g "${imgroot}/boot/archlive.img"
+        ret=$?
+    fi
+    if [ $ret -ne 0 ]; then
+        echo "error: initcpio image creation failed..."
+        exit 1
+    fi
+
+    cp ${instroot}/usr/lib/grub/i386-pc/* "${imgroot}/boot/grub"
+
+    if [ "x$IMG_TYPE" == "xdisk" ]; then
+        echo "Creating DISK image..."
+        mkusbimg "${imgroot}" "${imgname}"
+    else
+        echo "Creating ISO image..."
+        q=""
+        [ "${QUIET}" = "y" ] && qflag="-q"
+        mkisofs ${qflag} -r -l -b "boot/grub/stage2_eltorito" -uid 0 -gid 0 \
+            -no-emul-boot -boot-load-size 4 -boot-info-table \
+            -publisher "Arch Linux <archlinux.org>" \
+            -input-charset=UTF-8 -p "prepared by $NAME" \
+            -A "Arch Linux Live/Rescue CD" \
+            -o "${imgname}" "${imgroot}"
+    fi
+fi
+
+# vim:ts=4:sw=4:et:
diff --git a/archiso/mkusbimg b/archiso/mkusbimg
new file mode 100755
index 0000000..727bb80
--- /dev/null
+++ b/archiso/mkusbimg
@@ -0,0 +1,78 @@
+#!/bin/bash
+#
+#    mkusbimg - creates a bootable disk image
+#    Copyright (C) 2008  Simo Leone <simo@archlinux.org>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# usage(exitvalue)
+# outputs a usage message and exits with value
+APPNAME=$(basename "${0}")
+usage()
+{
+    echo "usage: ${APPNAME} <imageroot> <imagefile>"
+    exit $1
+}
+
+##################################################
+
+if [ $# -ne 2 ]; then
+    usage 1
+fi
+
+DISKIMG="${2}"
+IMGROOT="${1}"
+TMPDIR=$(mktemp -d)
+FSIMG=$(mktemp)
+
+# ext2 overhead's upper bound is 6%
+# empirically tested up to 1GB
+rootsize=$(du -bs ${IMGROOT}|cut -f1)
+IMGSZ=$(( (${rootsize}*106)/100/512 + 1)) # image size in sectors
+
+# create the filesystem image file
+dd if=/dev/zero of="$FSIMG" bs=512 count="$IMGSZ"
+
+# create a filesystem on the image
+mke2fs -m 0 -F "$FSIMG"
+
+# mount the filesystem and copy data
+mount -o loop "$FSIMG" "$TMPDIR"
+cp -a "$IMGROOT"/* "$TMPDIR"
+
+# unmount filesystem
+umount "$TMPDIR"
+
+# add sectors 0-62, then glue together
+dd if=/dev/zero of="$DISKIMG" bs=512 count=63
+cat "$FSIMG" >> "$DISKIMG"
+
+# create a partition table
+# if this looks like voodoo, it's because it is
+sfdisk -uS -f "$DISKIMG" << EOF
+63,$IMGSZ,83,*
+0,0,00
+0,0,00
+0,0,00
+EOF
+
+# install grub on the image
+grub --no-floppy --batch << EOF
+device (hd0) $DISKIMG
+root (hd0,0)
+setup (hd0)
+EOF
+
+# all done :)
+rm -fr "$TMPDIR" "$FSIMG"
diff --git a/archiso/testiso b/archiso/testiso
new file mode 100755
index 0000000..9de347a
--- /dev/null
+++ b/archiso/testiso
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ $# -ne 1 ]; then
+    echo "usage: testiso <iso name>"
+    exit 1
+fi
+qemu -boot d -kernel-kqemu -m 256 -cdrom "${1}"