294 lines
8 KiB
Bash
Executable file
294 lines
8 KiB
Bash
Executable file
#!/bin/sh
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# Copyright 2023 Johannes Schauer Marin Rodrigues <josch@debian.org>
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# Copyright 2023 Helmut Grohne <helmut@subdivi.de>
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# SPDX-License-Identifier: MIT
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#
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# This script is mostly compatible with autopkgtest-build-qemu as shipped in
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# autopkgtest. Main differences:
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# * It does not support any value for --boot but efi.
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# * It uses different tools, most importantly swaps out vmdb2.
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# * It can be run as non-root via user namespaces.
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# We generally use single quotes to avoid variable expansion:
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# shellcheck disable=SC2016
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set -eu
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die() {
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echo "$*" 1>&2
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exit 1
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}
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usage() {
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die "usage: $0 [--boot=|--architecture=|--apt-proxy=|--keyring=|--mirror=|--script=|--size=] <RELEASE> <IMAGE> [MIRROR] [ARCHITECTURE] [SCRIPT] [SIZE]"
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}
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usage_error() {
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echo "error: $*" 1>&2
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usage
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}
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BOOT=auto
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ARCHITECTURE=$(dpkg --print-architecture)
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IMAGE=
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MIRROR=
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KEYRING=
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RELEASE=
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SIZE=25G
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SCRIPT=
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# consumed by setup-testbed
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export AUTOPKGTEST_BUILD_QEMU=1
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opt_boot() {
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BOOT="$1"
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}
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opt_architecture() {
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ARCHITECTURE="$1"
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}
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opt_arch() {
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ARCHITECTURE="$1"
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}
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opt_apt_proxy() {
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# consumed by setup-testbed
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export AUTOPKGTEST_APT_PROXY="$1"
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# consumed by mmdebstrap
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if test "$1" = DIRECT; then
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unset http_proxy
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else
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export http_proxy="$1"
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fi
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}
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opt_keyring() {
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KEYRING="$1"
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}
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opt_mirror() {
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# consumed by setup-testbed
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export MIRROR="$1"
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}
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opt_script() {
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test -f "$1" || die "passed script '$1' does not refer to a file"
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SCRIPT="$1"
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}
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opt_size() {
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SIZE="$1"
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}
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positional=1
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positional_1() {
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# consumed by setup-testbed
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export RELEASE="$1"
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}
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positional_2() {
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IMAGE="$1"
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}
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positional_3() { opt_mirror "$@"; }
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positional_4() { opt_architecture "$@"; }
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positional_5() { opt_script "$@"; }
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positional_6() { opt_size "$@"; }
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positional_7() {
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die "too many positional options"
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}
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while test "$#" -gt 0; do
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case "$1" in
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--architecture=*|--arch=*|--boot=*|--keyring=*|--mirror=*|--script=*|--size=*)
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optname="${1%%=*}"
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"opt_${optname#--}" "${1#*=}"
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;;
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--apt-proxy=*)
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opt_apt_proxy "${1#*=}"
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;;
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--architecture|--arch|--boot|--keyring|--mirror|--script|--size)
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test "$#" -ge 2 || usage_error "missing argument for $1"
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"opt_${1#--}" "$2"
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shift
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;;
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--apt-proxy)
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test "$#" -ge 2 || usage_error "missing argument for $1"
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opt_apt_proxy "$2"
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shift
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;;
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--efi)
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opt_boot efi
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;;
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--*)
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usage_error "unrecognized argument $1"
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;;
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*)
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"positional_$positional" "$1"
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positional=$((positional + 1))
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;;
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esac
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shift
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done
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test -z "$RELEASE" -o -z "$IMAGE" && usage_error "missing positional arguments"
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test "$BOOT" = efi ||
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die "this tool does not support boot modes other than efi"
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case "$ARCHITECTURE" in
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amd64)
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EFIIMG=bootx64.efi
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;;
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arm64)
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EFIIMG=bootaa64.efi
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;;
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armhf)
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EFIIMG=bootarm.efi
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;;
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i386)
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EFIIMG=bootia32.efi
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;;
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riscv64)
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EFIIMG=bootriscv64.efi
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;;
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*)
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die "unsupported architecture"
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;;
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esac
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if test "$(dpkg-query -f '${db:Status-Status}' -W binutils-multiarch)" = installed; then
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GNU_PREFIX=
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else
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GNU_ARCHITECTURE="$(dpkg-architecture "-a$ARCHITECTURE" -qDEB_HOST_GNU_TYPE)"
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GNU_PREFIX="$GNU_ARCHITECTURE-"
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GNU_SUFFIX="-$(echo "$GNU_ARCHITECTURE" | tr _ -)"
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test "$(dpkg-query -f '${db:Status-Status}' -W "binutils$GNU_SUFFIX")" = installed ||
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die "please install binutils$GNU_SUFFIX or binutils-multiarch"
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fi
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for pkg in autopkgtest dosfstools e2fsprogs fdisk mount mtools passwd "systemd-boot-efi:$ARCHITECTURE" uidmap; do
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test "$(dpkg-query -f '${db:Status-Status}' -W "$pkg")" = installed ||
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die "please install $pkg"
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done
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BOOTSTUB="/usr/lib/systemd/boot/efi/linux${EFIIMG#boot}.stub"
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WORKDIR=
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cleanup() {
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test -n "$WORKDIR" && rm -Rf "$WORKDIR"
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}
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trap cleanup EXIT INT TERM QUIT
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WORKDIR=$(mktemp -d)
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FAT_OFFSET_SECTORS=$((1024*2))
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FAT_SIZE_SECTORS=$((1024*254))
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# Make the image writeable to the first subgid. mmdebstrap will map this gid to
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# the root group. unshare instead will map the current gid to 0 and the first
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# subgid to 1. Therefore mmdebstrap will be able to write to the image.
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rm -f "$IMAGE"
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: >"$IMAGE"
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unshare -U -r --map-groups=auto chown 0:1 "$IMAGE"
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chmod 0660 "$IMAGE"
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set -- \
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--mode=unshare \
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--variant=important \
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--architecture="$ARCHITECTURE"
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test "$RELEASE" = jessie &&
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set -- "$@" --hook-dir=/usr/share/mmdebstrap/hooks/jessie-or-older
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set -- "$@" \
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"--include=init,linux-image-$ARCHITECTURE,python3" \
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'--customize-hook=echo autopkgtestvm >"$1/etc/hostname"' \
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'--customize-hook=echo 127.0.0.1 localhost autopkgtestvm >"$1/etc/hosts"' \
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'--customize-hook=passwd --root "$1" --delete root' \
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'--customize-hook=useradd --root "$1" --home-dir /home/user --create-home user' \
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'--customize-hook=passwd --root "$1" --delete user' \
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'--customize-hook=/usr/share/autopkgtest/setup-commands/setup-testbed'
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if test -n "$SCRIPT"; then
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set -- "$@" \
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"--customize-hook=upload '$SCRIPT' /userscript" \
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"--chrooted-customize-hook=sh /userscript" \
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'--customize-hook=rm -f "$1/userscript"'
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fi
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EXT4_OFFSET_BYTES=$(( (FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS) * 512))
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EXT4_OPTIONS="offset=$EXT4_OFFSET_BYTES,assume_storage_prezeroed=1"
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set -- "$@" \
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"--customize-hook=download vmlinuz '$WORKDIR/kernel'" \
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"--customize-hook=download initrd.img '$WORKDIR/initrd'" \
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'--customize-hook=mount --bind "$1" "$1/mnt"' \
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'--customize-hook=mount --bind "$1/mnt/mnt" "$1/mnt/dev"' \
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'--customize-hook=/sbin/mkfs.ext4 -d "$1/mnt" -L autopkgtestvm -E '"'$EXT4_OPTIONS' '$IMAGE' '$SIZE'" \
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'--customize-hook=umount --lazy "$1/mnt"' \
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"$RELEASE" \
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/dev/null
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test -n "$MIRROR" && set -- "$@" "$MIRROR"
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test -n "$KEYRING" && set -- "$@" "--keyring=$KEYRING"
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echo "mmdebstrap $*"
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mmdebstrap "$@" || die "mmdebstrap failed"
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unshare -U -r --map-groups=auto chown 0:0 "$IMAGE"
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chmod "$(printf %o "$(( 0666 - 0$(umask) ))")" "$IMAGE"
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echo "root=LABEL=autopkgtestvm rw console=ttyS0" > "$WORKDIR/cmdline"
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align_size() {
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echo "$(( ($1) + ($2) - 1 - (($1) + ($2) - 1) % ($2) ))"
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}
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alignment=$("${GNU_PREFIX}objdump" -p "$BOOTSTUB" | sed 's/^SectionAlignment\s\+\([0-9]\)/0x/;t;d')
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test -z "$alignment" && die "failed to discover the alignment of the efi stub"
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echo "determined efi vma alignment as $alignment"
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test "$RELEASE" = jessie -a "$((alignment))" -lt "$((1024*1024))" && {
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echo "increasing efi vma alignment for jessie"
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alignment=$((1024*1024))
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}
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lastoffset=0
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# shellcheck disable=SC2034 # unused variables serve documentation
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lastoffset="$("${GNU_PREFIX}objdump" -h "$BOOTSTUB" |
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while read -r idx name size vma lma fileoff algn behind; do
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test -z "$behind" -a "${algn#"2**"}" != "$algn" || continue
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offset=$(( 0x$vma + 0x$size ))
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test "$offset" -gt "$lastoffset" || continue
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lastoffset="$offset"
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echo "$lastoffset"
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done | tail -n1)"
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lastoffset=$(align_size "$lastoffset" "$alignment")
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echo "determined minimum efi vma offset as $lastoffset"
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cmdline_size="$(stat -Lc%s "$WORKDIR/cmdline")"
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cmdline_size="$(align_size "$cmdline_size" "$alignment")"
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linux_size="$(stat -Lc%s "$WORKDIR/kernel")"
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linux_size="$(align_size "$linux_size" "$alignment")"
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cmdline_offset="$lastoffset"
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linux_offset=$((cmdline_offset + cmdline_size))
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initrd_offset=$((linux_offset + linux_size))
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SOURCE_DATE_EPOCH=0 \
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"${GNU_PREFIX}objcopy" \
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--enable-deterministic-archives \
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--add-section .cmdline="$WORKDIR/cmdline" \
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--change-section-vma .cmdline="$(printf 0x%x "$cmdline_offset")" \
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--add-section .linux="$WORKDIR/kernel" \
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--change-section-vma .linux="$(printf 0x%x "$linux_offset")" \
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--add-section .initrd="$WORKDIR/initrd" \
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--change-section-vma .initrd="$(printf 0x%x "$initrd_offset")" \
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"$BOOTSTUB" "$WORKDIR/efiimg"
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rm -f "$WORKDIR/kernel" "$WORKDIR/initrd"
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truncate -s "$((FAT_SIZE_SECTORS * 512))" "$WORKDIR/fat"
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/sbin/mkfs.fat -F 32 --invariant "$WORKDIR/fat"
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mmd -i "$WORKDIR/fat" EFI EFI/BOOT
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mcopy -i "$WORKDIR/fat" "$WORKDIR/efiimg" "::EFI/BOOT/$EFIIMG"
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rm -f "$WORKDIR/efiimg"
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truncate --size="+$((34*512))" "$IMAGE"
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/sbin/sfdisk "$IMAGE" <<EOF
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label: gpt
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unit: sectors
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start=$FAT_OFFSET_SECTORS, size=$FAT_SIZE_SECTORS, type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B
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start=$((FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS)), type=0FC63DAF-8483-4772-8E79-3D69D8477DE4
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EOF
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dd if="$WORKDIR/fat" of="$IMAGE" conv=notrunc,sparse bs=512 "seek=$FAT_OFFSET_SECTORS" status=none
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