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|
#!/bin/bash
die()
{
printf 'Error: %s\n' "$*" >&2
exit 1
}
KiB()
{
printf %s $(("$1" * 1024))
}
MiB()
{
KiB $(KiB "$1")
}
initialize_target()
{
rm -f "$target"
if [ "$ROOTFS" ]
then
fallocate -l $(($(KiB 17) + $(MiB $end_keys) + $(MiB $rootfs_size))) "$target"
else
fallocate -l $(($(KiB 17) + $(MiB $end_keys))) "$target"
fi
}
# TODO: Use GUID type tags for each Samizdat partition type.
partition_target()
{
parted "$target" -sm -a optimal \
unit MiB \
mklabel gpt \
mkpart samizdat-grub 1 8 \
set 1 bios_grub on \
mkpart samizdat-keys btrfs ${start_keys} ${end_keys}
if [ "$ROOTFS" ]
then
parted "$target" -sm -a optimal \
mkpart samizdat-rootfs btrfs ${end_keys}MiB 100%
fi
}
make_target_bootable()
{
losetup -f "$target"
dev=$(losetup -j "$target" -O NAME --noheadings)
kpartx -vasas "$dev"
kdev=/dev/mapper/${dev##*/}
mnt=$target.mnt
mkfs.btrfs --mixed "$kdev"p2
mkdir -p "$mnt"
mount "$kdev"p2 "$mnt"
mkdir -p "$mnt"/boot/grub
cp -aL "$GRUB_CONFIG" "$mnt"/boot/grub
eatmydata -- grub-install -v --boot-directory "$mnt"/boot "$dev"
sync
}
release_target_kernel_resources()
{
umount "$mnt"
kpartx -d "$dev"
losetup -d "$dev"
}
with_target()
{
local mnt dev target="$1"
shift
mnt=$target.mnt
mkdir -p "$mnt"
losetup -f "$target" -o $(MiB $start_keys)
dev=$(losetup -j "$target" -O NAME --noheadings)
mount "$dev" "$mnt"
"$@"
umount "$mnt"
losetup -d "$dev"
}
add_keys()
{
rsync -a --info=STATS "$GPG_INPUT_DIR"/ "$mnt"/gnupghome/
}
initrd_suffix=.samizdat
add_initrd()
{
mkdir -p "$mnt"/linux
rsync -aL --info=STATS "${1}vmlinuz${2}" "$mnt"/linux/vmlinuz
rsync -aL --info=STATS "${1}initrd.img${2}${initrd_suffix}" "$mnt"/linux/initrd.img
}
add_grub_cfg()
{
mkdir -p "$mnt"/boot/grub
cp -aL "$GRUB_CONFIG" "$mnt"/boot/grub
}
individualize()
{
add_keys
add_initrd "$samizdat_linux_dir"/ "${version_suffix}"
add_grub_cfg
}
sanity_checks()
{
[[ $UID = 0 ]] || die "You are not root."
for d in "$samizdat_linux_dir" "$GPG_INPUT_DIR"
do
[ -d "$d" ] || die "Not a directory: $d"
done
}
create_template()
{
local target="${1}.tmp"
if [ ! -e "${target%.tmp}" ]
then
initialize_target
partition_target
make_target_bootable
release_target_kernel_resources
mv -T "$target" "${target%.tmp}"
fi
}
individualize_target_from()
{
cp -T --reflink=always "$1" "$target"
with_target "$target" individualize
}
. samizdat-paths.sh || die 'samizdat-paths.sh not found'
samizdat_linux_dir=/boot
: ${GPG_INPUT_DIR:=/cdrom/gnupghome}
: ${GRUB_CONFIG:=conf/grub.cfg}
start_keys=64 # megs
end_keys=256 # megs
if [ "$1" ]
then
version_suffix=-$1
fi
sanity_checks
set -e
template=boot-disk.template.img
target=boot-disk.img.tmp
final=${target%.tmp}
create_template "$template"
individualize_target_from "$template"
mv -T "$target" "$final"
installer_target=target-disk.img
rm -f "$installer_target"
if [ ! -e "$installer_target" ]
then
fallocate -l 10G "$installer_target"
fi
qemu-system-x86_64 -enable-kvm -smp 2 -m 512 -k en-us -vga qxl -drive file="$final",format=raw -drive file="$installer_target",format=raw
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