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mkarchiso.sh
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#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-3.0-or-later
set -e -u
shopt -s extglob
# Control the environment
umask 0022
export LC_ALL="C.UTF-8"
[[ -v SOURCE_DATE_EPOCH ]] || printf -v SOURCE_DATE_EPOCH '%(%s)T' -1
export SOURCE_DATE_EPOCH
# Set application name from the script's file name
app_name="${0##*/}"
# Define global variables. All of them will be overwritten later
pkg_list=()
bootstrap_pkg_list=()
quiet=""
work_dir=""
out_dir=""
gpg_key=""
gpg_sender=""
iso_name=""
iso_label=""
iso_uuid=""
iso_publisher=""
iso_application=""
iso_version=""
install_dir=""
arch=""
pacman_conf=""
packages=""
bootstrap_packages=""
pacstrap_dir=""
search_filename=""
declare -i rm_work_dir=0
buildmodes=()
bootmodes=()
airootfs_image_type=""
airootfs_image_tool_options=()
bootstrap_tarball_compression=""
cert_list=()
declare -A file_permissions=()
efibootimg=""
efiboot_files=()
# adapted from GRUB_EARLY_INITRD_LINUX_STOCK in https://git.savannah.gnu.org/cgit/grub.git/tree/util/grub-mkconfig.in
readonly ucodes=('intel-uc.img' 'intel-ucode.img' 'amd-uc.img' 'amd-ucode.img' 'early_ucode.cpio' 'microcode.cpio')
declare -i need_external_ucodes=0
# Show an INFO message
# $1: message string
_msg_info() {
local _msg="${1}"
[[ "${quiet}" == "y" ]] || printf '[%s] INFO: %s\n' "${app_name}" "${_msg}"
}
# Show a WARNING message
# $1: message string
_msg_warning() {
local _msg="${1}"
printf '[%s] WARNING: %s\n' "${app_name}" "${_msg}" >&2
}
# Show an ERROR message then exit with status
# $1: message string
# $2: exit code number (with 0 does not exit)
_msg_error() {
local _msg="${1}"
local _error=${2}
printf '[%s] ERROR: %s\n' "${app_name}" "${_msg}" >&2
if (( _error > 0 )); then
exit "${_error}"
fi
}
# Show help usage, with an exit status.
# $1: exit status number.
_usage() {
IFS='' read -r -d '' usagetext <<ENDUSAGETEXT || true
usage: ${app_name} [options] <profile_dir>
options:
-A <application> Set an application name for the ISO
Default: '${iso_application}'
-C <file> pacman configuration file.
Default: '${pacman_conf}'
-D <install_dir> Set an install_dir. All files will be located here.
Default: '${install_dir}'
NOTE: Max 8 characters, use only [a-z0-9]
-L <label> Set the ISO volume label
Default: '${iso_label}'
-P <publisher> Set the ISO publisher
Default: '${iso_publisher}'
-c [cert ..] Provide certificates for codesigning of netboot artifacts as
well as the rootfs artifact.
Multiple files are provided as quoted, space delimited list.
The first file is considered as the signing certificate,
the second as the key and the third as the optional certificate authority.
-g <gpg_key> Set the PGP key ID to be used for signing the rootfs image.
Passed to gpg as the value for --default-key
-G <mbox> Set the PGP signer (must include an email address)
Passed to gpg as the value for --sender
-h This message
-m [mode ..] Build mode(s) to use (valid modes are: 'bootstrap', 'iso' and 'netboot').
Multiple build modes are provided as quoted, space delimited list.
-o <out_dir> Set the output directory
Default: '${out_dir}'
-p [package ..] Package(s) to install.
Multiple packages are provided as quoted, space delimited list.
-r Delete the working directory at the end.
-v Enable verbose output
-w <work_dir> Set the working directory
Default: '${work_dir}'
profile_dir: Directory of the archiso profile to build
ENDUSAGETEXT
printf '%s' "${usagetext}"
exit "${1}"
}
# Shows configuration options.
_show_config() {
local build_date
printf -v build_date '%(%FT%R%z)T' "${SOURCE_DATE_EPOCH}"
_msg_info "${app_name} configuration settings"
_msg_info " Architecture: ${arch}"
_msg_info " Working directory: ${work_dir}"
_msg_info " Installation directory: ${install_dir}"
_msg_info " Build date: ${build_date}"
_msg_info " Output directory: ${out_dir}"
_msg_info " Current build mode: ${buildmode}"
_msg_info " Build modes: ${buildmodes[*]}"
_msg_info " GPG key: ${gpg_key:-None}"
_msg_info " GPG signer: ${gpg_sender:-None}"
_msg_info "Code signing certificates: ${cert_list[*]:-None}"
_msg_info " Profile: ${profile}"
_msg_info "Pacman configuration file: ${pacman_conf}"
_msg_info " Image file name: ${image_name:-None}"
_msg_info " ISO volume label: ${iso_label}"
_msg_info " ISO publisher: ${iso_publisher}"
_msg_info " ISO application: ${iso_application}"
_msg_info " Boot modes: ${bootmodes[*]:-None}"
_msg_info " Packages File: ${buildmode_packages}"
_msg_info " Packages: ${buildmode_pkg_list[*]}"
}
# Cleanup airootfs
_cleanup_pacstrap_dir() {
_msg_info "Cleaning up in pacstrap location..."
# Delete all files in /boot
[[ -d "${pacstrap_dir}/boot" ]] && find "${pacstrap_dir}/boot" -mindepth 1 -delete
# Delete pacman database sync cache files (*.tar.gz)
[[ -d "${pacstrap_dir}/var/lib/pacman" ]] && find "${pacstrap_dir}/var/lib/pacman" -maxdepth 1 -type f -delete
# Delete pacman database sync cache
[[ -d "${pacstrap_dir}/var/lib/pacman/sync" ]] && find "${pacstrap_dir}/var/lib/pacman/sync" -delete
# Delete pacman package cache
[[ -d "${pacstrap_dir}/var/cache/pacman/pkg" ]] && find "${pacstrap_dir}/var/cache/pacman/pkg" -type f -delete
# Delete all log files, keeps empty dirs.
[[ -d "${pacstrap_dir}/var/log" ]] && find "${pacstrap_dir}/var/log" -type f -delete
# Delete all temporary files and dirs
[[ -d "${pacstrap_dir}/var/tmp" ]] && find "${pacstrap_dir}/var/tmp" -mindepth 1 -delete
# Delete package pacman related files.
find "${work_dir}" \( -name '*.pacnew' -o -name '*.pacsave' -o -name '*.pacorig' \) -delete
# Create /etc/machine-id with special value 'uninitialized': the final id is
# generated on first boot, systemd's first-boot mechanism applies (see machine-id(5))
rm -f -- "${pacstrap_dir}/etc/machine-id"
printf 'uninitialized\n' >"${pacstrap_dir}/etc/machine-id"
_msg_info "Done!"
}
# Create a squashfs image and place it in the ISO 9660 file system.
# $@: options to pass to mksquashfs
_run_mksquashfs() {
local mksquashfs_options=() image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
rm -f -- "${image_path}"
[[ ! "${quiet}" == "y" ]] || mksquashfs_options+=('-no-progress' '-quiet')
mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}" "${mksquashfs_options[@]}"
}
# Create an ext4 image containing the root file system and pack it inside a squashfs image.
# Save the squashfs image on the ISO 9660 file system.
_mkairootfs_ext4+squashfs() {
local ext4_hash_seed mkfs_ext4_options=()
[[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
_msg_info "Creating ext4 image of 32 GiB and copying '${pacstrap_dir}/' to it..."
ext4_hash_seed="$(uuidgen --sha1 --namespace 93a870ff-8565-4cf3-a67b-f47299271a96 \
--name "${SOURCE_DATE_EPOCH} ext4 hash seed")"
mkfs_ext4_options=(
'-d' "${pacstrap_dir}"
'-O' '^has_journal,^resize_inode'
'-E' "lazy_itable_init=0,root_owner=0:0,hash_seed=${ext4_hash_seed}"
'-m' '0'
'-F'
'-U' 'clear'
)
[[ ! "${quiet}" == "y" ]] || mkfs_ext4_options+=('-q')
rm -f -- "${pacstrap_dir}.img"
E2FSPROGS_FAKE_TIME="${SOURCE_DATE_EPOCH}" mkfs.ext4 "${mkfs_ext4_options[@]}" -- "${pacstrap_dir}.img" 32G
tune2fs -c 0 -i 0 -- "${pacstrap_dir}.img" >/dev/null
_msg_info "Done!"
install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
_msg_info "Creating SquashFS image, this may take some time..."
_run_mksquashfs "${pacstrap_dir}.img"
_msg_info "Done!"
rm -- "${pacstrap_dir}.img"
}
# Create a squashfs image containing the root file system and saves it on the ISO 9660 file system.
_mkairootfs_squashfs() {
[[ -e ${profile}/chroot.sh ]] && ${profile}/chroot.sh
[[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
_msg_info "Creating SquashFS image, this may take some time..."
_run_mksquashfs "${pacstrap_dir}"
}
# Create an EROFS image containing the root file system and saves it on the ISO 9660 file system.
_mkairootfs_erofs() {
local fsuuid mkfs_erofs_options=()
[[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
local image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.erofs"
rm -f -- "${image_path}"
[[ ! "${quiet}" == "y" ]] || mkfs_erofs_options+=('--quiet')
# Generate reproducible file system UUID from SOURCE_DATE_EPOCH
fsuuid="$(uuidgen --sha1 --namespace 93a870ff-8565-4cf3-a67b-f47299271a96 --name "${SOURCE_DATE_EPOCH}")"
mkfs_erofs_options+=('-U' "${fsuuid}" "${airootfs_image_tool_options[@]}")
_msg_info "Creating EROFS image, this may take some time..."
mkfs.erofs "${mkfs_erofs_options[@]}" -- "${image_path}" "${pacstrap_dir}"
_msg_info "Done!"
}
# Create checksum file for the rootfs image.
_mkchecksum() {
_msg_info "Creating checksum file for self-test..."
cd -- "${isofs_dir}/${install_dir}/${arch}"
if [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" ]]; then
sha512sum airootfs.sfs >airootfs.sha512
elif [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.erofs" ]]; then
sha512sum airootfs.erofs >airootfs.sha512
fi
cd -- "${OLDPWD}"
_msg_info "Done!"
}
# GPG sign the root file system image.
_mk_pgp_signature() {
local gpg_options=()
local airootfs_image_filename="${1}"
_msg_info "Signing rootfs image using GPG..."
rm -f -- "${airootfs_image_filename}.sig"
# Add gpg sender option if the value is provided
[[ -z "${gpg_sender}" ]] || gpg_options+=('--sender' "${gpg_sender}")
# always use the .sig file extension, as that is what mkinitcpio-archiso's hooks expect
gpg --batch --no-armor --no-include-key-block --output "${airootfs_image_filename}.sig" --detach-sign \
--default-key "${gpg_key}" "${gpg_options[@]}" "${airootfs_image_filename}"
_msg_info "Done!"
}
# Helper function to run functions only one time.
# $1: function name
_run_once() {
if [[ ! -e "${work_dir}/${run_once_mode}.${1}" ]]; then
"$1"
touch "${work_dir}/${run_once_mode}.${1}"
fi
}
# Set up custom pacman.conf with custom cache and pacman hook directories.
_make_pacman_conf() {
local _cache_dirs _system_cache_dirs _profile_cache_dirs
_system_cache_dirs="$(pacman-conf CacheDir | tr '\n' ' ')"
_profile_cache_dirs="$(pacman-conf --config "${pacman_conf}" CacheDir | tr '\n' ' ')"
# Only use the profile's CacheDir, if it is not the default and not the same as the system cache dir.
if [[ "${_profile_cache_dirs}" != "/var/cache/pacman/pkg" ]] \
&& [[ "${_system_cache_dirs}" != "${_profile_cache_dirs}" ]]; then
_cache_dirs="${_profile_cache_dirs}"
else
_cache_dirs="${_system_cache_dirs}"
fi
_msg_info "Copying custom pacman.conf to work directory..."
_msg_info "Using pacman CacheDir: ${_cache_dirs}"
# take the profile pacman.conf and strip all settings that would break in chroot when using pacman -r
# append CacheDir and HookDir to [options] section
# HookDir is *always* set to the airootfs' override directory
# see `man 8 pacman` for further info
pacman-conf --config "${pacman_conf}" \
| sed "/CacheDir/d;/DBPath/d;/HookDir/d;/LogFile/d;/RootDir/d;/\[options\]/a CacheDir = ${_cache_dirs}
/\[options\]/a HookDir = ${pacstrap_dir}/etc/pacman.d/hooks/" >"${work_dir}/${buildmode}.pacman.conf"
}
# Prepare working directory and copy custom root file system files.
_make_custom_airootfs() {
local passwd=()
local filename permissions
install -d -m 0755 -o 0 -g 0 -- "${pacstrap_dir}"
if [[ -d "${profile}/airootfs" ]]; then
_msg_info "Copying custom airootfs files..."
cp -af --no-preserve=ownership,mode -- "${profile}/airootfs/." "${pacstrap_dir}"
# Set ownership and mode for files and directories
for filename in "${!file_permissions[@]}"; do
IFS=':' read -ra permissions <<<"${file_permissions["${filename}"]}"
# Prevent file path traversal outside of $pacstrap_dir
if [[ "$(realpath -q -- "${pacstrap_dir}${filename}")" != "${pacstrap_dir}"* ]]; then
_msg_error "Failed to set permissions on '${pacstrap_dir}${filename}'. Outside of valid path." 1
# Warn if the file does not exist
elif [[ ! -e "${pacstrap_dir}${filename}" ]]; then
_msg_warning "Cannot change permissions of '${pacstrap_dir}${filename}'. The file or directory does not exist."
else
if [[ "${filename: -1}" == "/" ]]; then
chown -fhR -- "${permissions[0]}:${permissions[1]}" "${pacstrap_dir}${filename}"
chmod -fR -- "${permissions[2]}" "${pacstrap_dir}${filename}"
else
chown -fh -- "${permissions[0]}:${permissions[1]}" "${pacstrap_dir}${filename}"
chmod -f -- "${permissions[2]}" "${pacstrap_dir}${filename}"
fi
fi
done
_msg_info "Done!"
fi
}
# Install desired packages to the root file system
_make_packages() {
_msg_info "Installing packages to '${pacstrap_dir}/'..."
if [[ -v gpg_publickey ]]; then
exec {ARCHISO_GNUPG_FD}<"$gpg_publickey"
export ARCHISO_GNUPG_FD
fi
if [[ -v cert_list[0] ]]; then
exec {ARCHISO_TLS_FD}<"${cert_list[0]}"
export ARCHISO_TLS_FD
fi
if [[ -v cert_list[2] ]]; then
exec {ARCHISO_TLSCA_FD}<"${cert_list[2]}"
export ARCHISO_TLSCA_FD
fi
# Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
if [[ "${quiet}" = "y" ]]; then
env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}" &>/dev/null
else
env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}"
fi
if [[ -v cert_list[0] ]]; then
exec {ARCHISO_TLS_FD}<&-
unset ARCHISO_TLS_FD
fi
if [[ -v cert_list[2] ]]; then
exec {ARCHISO_TLSCA_FD}<&-
unset ARCHISO_TLSCA_FD
fi
if [[ -v gpg_publickey ]]; then
exec {ARCHISO_GNUPG_FD}<&-
unset ARCHISO_GNUPG_FD
fi
_msg_info "Done! Packages installed successfully."
}
# Customize installation.
_make_customize_airootfs() {
local passwd=()
if [[ -e "${profile}/airootfs/etc/passwd" ]]; then
_msg_info "Copying /etc/skel/* to user homes..."
while IFS=':' read -a passwd -r; do
# Only operate on UIDs in range 1000–59999
(( passwd[2] >= 1000 && passwd[2] < 60000 )) || continue
# Skip invalid home directories
[[ "${passwd[5]}" == '/' ]] && continue
[[ -z "${passwd[5]}" ]] && continue
# Prevent path traversal outside of $pacstrap_dir
if [[ "$(realpath -q -- "${pacstrap_dir}${passwd[5]}")" == "${pacstrap_dir}"* ]]; then
if [[ ! -d "${pacstrap_dir}${passwd[5]}" ]]; then
install -d -m 0750 -o "${passwd[2]}" -g "${passwd[3]}" -- "${pacstrap_dir}${passwd[5]}"
fi
cp -dRT --update=none --preserve=mode,timestamps,links -- "${pacstrap_dir}/etc/skel/." "${pacstrap_dir}${passwd[5]}"
chmod -f 0750 -- "${pacstrap_dir}${passwd[5]}"
chown -hR -- "${passwd[2]}:${passwd[3]}" "${pacstrap_dir}${passwd[5]}"
else
_msg_error "Failed to set permissions on '${pacstrap_dir}${passwd[5]}'. Outside of valid path." 1
fi
done <"${profile}/airootfs/etc/passwd"
_msg_info "Done!"
fi
if [[ -e "${pacstrap_dir}/root/customize_airootfs.sh" ]]; then
_msg_info "Running customize_airootfs.sh in '${pacstrap_dir}' chroot..."
_msg_warning "customize_airootfs.sh is deprecated! Support for it will be removed in a future archiso version."
chmod -f -- +x "${pacstrap_dir}/root/customize_airootfs.sh"
# Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
eval -- env -u TMPDIR arch-chroot "${pacstrap_dir}" "/root/customize_airootfs.sh"
rm -- "${pacstrap_dir}/root/customize_airootfs.sh"
_msg_info "Done! customize_airootfs.sh run successfully."
fi
}
# Set up boot loaders
_make_bootmodes() {
local bootmode
for bootmode in "${bootmodes[@]}"; do
_run_once "_make_bootmode_${bootmode}"
done
if [[ "${bootmodes[*]}" != *grub* ]]; then
_run_once _make_common_grubenv_and_loopbackcfg
fi
}
# Copy kernel and initramfs to ISO 9660
_make_boot_on_iso9660() {
local ucode_image
_msg_info "Preparing kernel and initramfs for the ISO 9660 file system..."
install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/${arch}"
install -m 0644 -- "${pacstrap_dir}/boot/initramfs-"*".img" "${isofs_dir}/${install_dir}/boot/${arch}/"
install -m 0644 -- "${pacstrap_dir}/boot/vmlinuz-"* "${isofs_dir}/${install_dir}/boot/${arch}/"
if (( need_external_ucodes )); then
for ucode_image in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${ucode_image}" ]]; then
install -m 0644 -- "${pacstrap_dir}/boot/${ucode_image}" "${isofs_dir}/${install_dir}/boot/"
if [[ -e "${pacstrap_dir}/usr/share/licenses/${ucode_image%.*}/" ]]; then
install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/${ucode_image%.*}/"* \
"${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
fi
fi
done
fi
_msg_info "Done!"
}
# Prepare syslinux for booting from MBR (isohybrid)
_make_bootmode_bios.syslinux.mbr() {
_msg_info "Setting up SYSLINUX for BIOS booting from a disk..."
install -d -m 0755 -- "${isofs_dir}/boot/syslinux"
for _cfg in "${profile}/syslinux/"*.cfg; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%ARCHISO_UUID%|${iso_uuid}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_cfg}" >"${isofs_dir}/boot/syslinux/${_cfg##*/}"
done
if [[ -e "${profile}/syslinux/splash.png" ]]; then
install -m 0644 -- "${profile}/syslinux/splash.png" "${isofs_dir}/boot/syslinux/"
fi
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/"*.c32 "${isofs_dir}/boot/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/lpxelinux.0" "${isofs_dir}/boot/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/memdisk" "${isofs_dir}/boot/syslinux/"
_run_once _make_boot_on_iso9660
if [[ -e "${isofs_dir}/boot/syslinux/hdt.c32" ]]; then
install -d -m 0755 -- "${isofs_dir}/boot/syslinux/hdt"
if [[ -e "${pacstrap_dir}/usr/share/hwdata/pci.ids" ]]; then
gzip -cn9 "${pacstrap_dir}/usr/share/hwdata/pci.ids" > \
"${isofs_dir}/boot/syslinux/hdt/pciids.gz"
fi
find "${pacstrap_dir}/usr/lib/modules" -name 'modules.alias' -print -exec gzip -cn9 '{}' ';' -quit > \
"${isofs_dir}/boot/syslinux/hdt/modalias.gz"
fi
# Add other aditional/extra files to ${install_dir}/boot/
if [[ -e "${pacstrap_dir}/boot/memtest86+/memtest.bin" ]]; then
install -d -m 0755 -- "${isofs_dir}/boot/memtest86+/"
# rename for PXE: https://wiki.archlinux.org/title/Syslinux#Using_memtest
install -m 0644 -- "${pacstrap_dir}/boot/memtest86+/memtest.bin" "${isofs_dir}/boot/memtest86+/memtest"
install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/spdx/GPL-2.0-only.txt" "${isofs_dir}/boot/memtest86+/LICENSE"
fi
_msg_info "Done! SYSLINUX set up for BIOS booting from a disk successfully."
}
# Prepare syslinux for El-Torito booting
_make_bootmode_bios.syslinux.eltorito() {
_msg_info "Setting up SYSLINUX for BIOS booting from an optical disc..."
install -d -m 0755 -- "${isofs_dir}/boot/syslinux"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isolinux.bin" "${isofs_dir}/boot/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isohdpfx.bin" "${isofs_dir}/boot/syslinux/"
# ISOLINUX and SYSLINUX installation is shared
_run_once _make_bootmode_bios.syslinux.mbr
_msg_info "Done! SYSLINUX set up for BIOS booting from an optical disc successfully."
}
# Copy kernel and initramfs to FAT image
_make_boot_on_fat() {
local ucode_image all_ucode_images=()
_msg_info "Preparing kernel and initramfs for the FAT file system..."
mmd -i "${efibootimg}" \
"::/${install_dir}" "::/${install_dir}/boot" "::/${install_dir}/boot/${arch}"
mcopy -i "${efibootimg}" "${pacstrap_dir}/boot/vmlinuz-"* \
"${pacstrap_dir}/boot/initramfs-"*".img" "::/${install_dir}/boot/${arch}/"
if (( need_external_ucodes )); then
for ucode_image in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${ucode_image}" ]]; then
all_ucode_images+=("${pacstrap_dir}/boot/${ucode_image}")
fi
done
if (( ${#all_ucode_images[@]} )); then
mcopy -i "${efibootimg}" "${all_ucode_images[@]}" "::/${install_dir}/boot/"
fi
fi
_msg_info "Done!"
}
# Create a FAT image (efiboot.img) which will serve as the EFI system partition
# $1: image size in bytes
_make_efibootimg() {
local imgsize_kib="0"
local imgsize_bytes=${1}
if (( imgsize_bytes < 2*1024*1024 )); then
_msg_info "Validating '${bootmode}': efiboot.img size is ${imgsize_bytes} bytes is less than 2 MiB! Bumping up to 2 MiB"
imgsize_bytes=$((2*1024*1024))
fi
# Convert from bytes to KiB and round up to the next full MiB with an additional MiB for reserved sectors.
imgsize_kib="$(
awk 'function ceil(x){return int(x)+(x>int(x))}
function byte_to_kib(x){return x/1024}
function mib_to_kib(x){return x*1024}
END {print mib_to_kib(ceil((byte_to_kib($1)+1024)/1024))}' <<<"${imgsize_bytes}"
)"
# The FAT image must be created with mkfs.fat not mformat, as some systems have issues with mformat made images:
# https://lists.gnu.org/archive/html/grub-devel/2019-04/msg00099.html
rm -f -- "${efibootimg}"
_msg_info "Creating FAT image of size: ${imgsize_kib} KiB..."
if [[ "${quiet}" == "y" ]]; then
# mkfs.fat does not have a -q/--quiet option, so redirect stdout to /dev/null instead
# https://github.com/dosfstools/dosfstools/issues/103
mkfs.fat -C -n ARCHISO_EFI "${efibootimg}" "${imgsize_kib}" >/dev/null
else
mkfs.fat -C -n ARCHISO_EFI "${efibootimg}" "${imgsize_kib}"
fi
# Create the default/fallback boot path in which a boot loaders will be placed later.
mmd -i "${efibootimg}" ::/EFI ::/EFI/BOOT
}
# Check if initramfs files contain early_cpio
_check_if_initramfs_has_early_cpio() {
local initrd
for initrd in $(compgen -G "${pacstrap_dir}"'/boot/initramfs-*.img'); do
if ! bsdtar -tf "$initrd" early_cpio &>/dev/null; then
need_external_ucodes=1
_msg_info "Initramfs file does not contain 'early_cpio'. External microcode initramfs images will be copied."
return
fi
done
}
# Copy GRUB files to ISO 9660 which is used by both IA32 UEFI and x64 UEFI
_make_common_bootmode_grub_copy_to_isofs() {
local files_to_copy=()
files_to_copy+=("${work_dir}/grub/"*)
if compgen -G "${profile}/grub/!(*.cfg)" &>/dev/null; then
files_to_copy+=("${profile}/grub/"!(*.cfg))
fi
install -d -m 0755 -- "${isofs_dir}/boot/grub"
cp -r --remove-destination -- "${files_to_copy[@]}" "${isofs_dir}/boot/grub/"
}
# Prepare GRUB configuration files
_make_common_bootmode_grub_cfg() {
local _cfg
install -d -- "${work_dir}/grub"
# Fill GRUB configuration files
for _cfg in "${profile}/grub/"*'.cfg'; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%ARCHISO_UUID%|${iso_uuid}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g;
s|%ARCHISO_SEARCH_FILENAME%|${search_filename}|g" \
"${_cfg}" >"${work_dir}/grub/${_cfg##*/}"
done
# Prepare grub.cfg that will be embedded inside the GRUB binaries
IFS='' read -r -d '' grubembedcfg <<'EOF' || true
if ! [ -d "$cmdpath" ]; then
# On some firmware, GRUB has a wrong cmdpath when booted from an optical disc. During El Torito boot, GRUB is
# launched from a case-insensitive FAT-formatted EFI system partition, but it seemingly cannot access that partition
# and sets cmdpath to the whole cd# device which has case-sensitive ISO 9660 + Rock Ridge + Joliet file systems.
# See https://gitlab.archlinux.org/archlinux/archiso/-/issues/183 and https://savannah.gnu.org/bugs/?62886
if regexp --set=1:archiso_bootdevice '^\(([^)]+)\)\/?[Ee][Ff][Ii]\/[Bb][Oo][Oo][Tt]\/?$' "${cmdpath}"; then
set cmdpath="(${archiso_bootdevice})/EFI/BOOT"
set ARCHISO_HINT="${archiso_bootdevice}"
fi
fi
# Prepare a hint for the search command using the device in cmdpath
if [ -z "${ARCHISO_HINT}" ]; then
regexp --set=1:ARCHISO_HINT '^\(([^)]+)\)' "${cmdpath}"
fi
# Search for the ISO volume
if search --no-floppy --set=archiso_device --file '%ARCHISO_SEARCH_FILENAME%' --hint "${ARCHISO_HINT}"; then
set ARCHISO_HINT="${archiso_device}"
if probe --set ARCHISO_UUID --fs-uuid "${ARCHISO_HINT}"; then
export ARCHISO_UUID
fi
else
echo "Could not find a volume with a '%ARCHISO_SEARCH_FILENAME%' file on it!"
fi
# Load grub.cfg
if [ "${ARCHISO_HINT}" == 'memdisk' -o -z "${ARCHISO_HINT}" ]; then
echo 'Could not find the ISO volume!'
elif [ -e "(${ARCHISO_HINT})/boot/grub/grub.cfg" ]; then
export ARCHISO_HINT
set root="${ARCHISO_HINT}"
configfile "(${ARCHISO_HINT})/boot/grub/grub.cfg"
else
echo "File '(${ARCHISO_HINT})/boot/grub/grub.cfg' not found!"
fi
EOF
grubembedcfg="${grubembedcfg//'%ARCHISO_SEARCH_FILENAME%'/"${search_filename}"}"
printf '%s\n' "$grubembedcfg" >"${work_dir}/grub-embed.cfg"
# Write grubenv
printf '%.1024s' \
"$(printf '# GRUB Environment Block\nNAME=%s\nVERSION=%s\nARCHISO_LABEL=%s\nINSTALL_DIR=%s\nARCH=%s\nARCHISO_SEARCH_FILENAME=%s\n%s' \
"${iso_name}" \
"${iso_version}" \
"${iso_label}" \
"${install_dir}" \
"${arch}" \
"${search_filename}" \
"$(printf '%0.1s' "#"{1..1024})")" \
>"${work_dir}/grub/grubenv"
}
# Create GRUB specific configuration files when GRUB is not used as a boot loader
_make_common_grubenv_and_loopbackcfg() {
install -d -m 0755 -- "${isofs_dir}/boot/grub"
# Write grubenv
printf '%.1024s' \
"$(printf '# GRUB Environment Block\nNAME=%s\nVERSION=%s\nARCHISO_LABEL=%s\nINSTALL_DIR=%s\nARCH=%s\nARCHISO_SEARCH_FILENAME=%s\n%s' \
"${iso_name}" \
"${iso_version}" \
"${iso_label}" \
"${install_dir}" \
"${arch}" \
"${search_filename}" \
"$(printf '%0.1s' "#"{1..1024})")" \
>"${isofs_dir}/boot/grub/grubenv"
# Copy loopback.cfg to /boot/grub/ on ISO 9660
if [[ -e "${profile}/grub/loopback.cfg" ]]; then
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%ARCHISO_UUID%|${iso_uuid}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g;
s|%ARCHISO_SEARCH_FILENAME%|${search_filename}|g" \
"${profile}/grub/loopback.cfg" >"${isofs_dir}/boot/grub/loopback.cfg"
fi
}
_make_bootmode_uefi-ia32.grub.esp() {
local grubmodules=()
# Prepare configuration files
_run_once _make_common_bootmode_grub_cfg
# Create EFI binary
# Module list from https://bugs.archlinux.org/task/71382#comment202911
grubmodules=(all_video at_keyboard boot btrfs cat chain configfile echo efifwsetup efinet exfat ext2 f2fs fat font \
gfxmenu gfxterm gzio halt hfsplus iso9660 jpeg keylayouts linux loadenv loopback lsefi lsefimmap \
minicmd normal ntfs ntfscomp part_apple part_gpt part_msdos png read reboot regexp search \
search_fs_file search_fs_uuid search_label serial sleep tpm udf usb usbserial_common usbserial_ftdi \
usbserial_pl2303 usbserial_usbdebug video xfs zstd)
grub-mkstandalone -O i386-efi \
--modules="${grubmodules[*]}" \
--locales="en@quot" \
--themes="" \
--sbat=/usr/share/grub/sbat.csv \
--disable-shim-lock \
-o "${work_dir}/BOOTIA32.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
# Add GRUB to the list of files used to calculate the required FAT image size.
efiboot_files+=("${work_dir}/BOOTIA32.EFI"
"${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi")
if [[ " ${bootmodes[*]} " =~ uefi-x64.systemd-boot.esp ]]; then
# TODO: Remove this branch.
_run_once _make_bootmode_uefi-x64.systemd-boot.esp
elif [[ " ${bootmodes[*]} " =~ uefi-x64.grub.esp ]]; then
_run_once _make_bootmode_uefi-x64.grub.esp
else
efiboot_imgsize="$(du -bcs -- "${efiboot_files[@]}" 2>/dev/null | awk 'END { print $1 }')"
# Create a FAT image for the EFI system partition
_make_efibootimg "$efiboot_imgsize"
fi
# Copy GRUB EFI binary to the default/fallback boot path
mcopy -i "${efibootimg}" "${work_dir}/BOOTIA32.EFI" ::/EFI/BOOT/BOOTIA32.EFI
# Copy GRUB files
_run_once _make_common_bootmode_grub_copy_to_isofs
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ]]; then
mcopy -i "${efibootimg}" "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ::/shellia32.efi
fi
_msg_info "Done! GRUB set up for UEFI booting successfully."
}
# Prepare GRUB for El Torito booting
_make_bootmode_uefi-ia32.grub.eltorito() {
# El Torito UEFI boot requires an image containing the EFI system partition.
# uefi-ia32.grub.eltorito has the same requirements as uefi-ia32.grub.esp
_run_once _make_bootmode_uefi-ia32.grub.esp
# Prepare configuration files
_run_once _make_common_bootmode_grub_cfg
# Additionally set up systemd-boot in ISO 9660. This allows creating a medium for the live environment by using
# manual partitioning and simply copying the ISO 9660 file system contents.
# This is not related to El Torito booting and no firmware uses these files.
_msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
# Copy GRUB EFI binary to the default/fallback boot path
install -m 0644 -- "${work_dir}/BOOTIA32.EFI" "${isofs_dir}/EFI/BOOT/BOOTIA32.EFI"
# Copy GRUB configuration files
_run_once _make_common_bootmode_grub_copy_to_isofs
# edk2-shell based UEFI shell
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ]]; then
install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" "${isofs_dir}/shellia32.efi"
fi
_msg_info "Done!"
}
_make_bootmode_uefi-x64.grub.esp() {
local grubmodules=()
# Prepare configuration files
_run_once _make_common_bootmode_grub_cfg
# Create EFI binary
# Module list from https://bugs.archlinux.org/task/71382#comment202911
grubmodules=(all_video at_keyboard boot btrfs cat chain configfile echo efifwsetup efinet exfat ext2 f2fs fat font \
gfxmenu gfxterm gzio halt hfsplus iso9660 jpeg keylayouts linux loadenv loopback lsefi lsefimmap \
minicmd normal ntfs ntfscomp part_apple part_gpt part_msdos png read reboot regexp search \
search_fs_file search_fs_uuid search_label serial sleep tpm udf usb usbserial_common usbserial_ftdi \
usbserial_pl2303 usbserial_usbdebug video xfs zstd)
grub-mkstandalone -O x86_64-efi \
--modules="${grubmodules[*]}" \
--locales="en@quot" \
--themes="" \
--sbat=/usr/share/grub/sbat.csv \
--disable-shim-lock \
-o "${work_dir}/BOOTx64.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
# Add GRUB to the list of files used to calculate the required FAT image size.
efiboot_files+=("${work_dir}/BOOTx64.EFI"
"${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi")
efiboot_imgsize="$(du -bcs -- "${efiboot_files[@]}" 2>/dev/null | awk 'END { print $1 }')"
# Create a FAT image for the EFI system partition
_make_efibootimg "$efiboot_imgsize"
# Copy GRUB EFI binary to the default/fallback boot path
mcopy -i "${efibootimg}" "${work_dir}/BOOTx64.EFI" ::/EFI/BOOT/BOOTx64.EFI
# Copy GRUB files
_run_once _make_common_bootmode_grub_copy_to_isofs
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
mcopy -i "${efibootimg}" "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
fi
# Add other aditional/extra files to ${install_dir}/boot/
if [[ -e "${pacstrap_dir}/boot/memtest86+/memtest.efi" ]]; then
install -d -m 0755 -- "${isofs_dir}/boot/memtest86+/"
install -m 0644 -- "${pacstrap_dir}/boot/memtest86+/memtest.efi" "${isofs_dir}/boot/memtest86+/memtest.efi"
install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/spdx/GPL-2.0-only.txt" "${isofs_dir}/boot/memtest86+/LICENSE"
fi
_msg_info "Done! GRUB set up for UEFI booting successfully."
}
# Prepare GRUB for El Torito booting
_make_bootmode_uefi-x64.grub.eltorito() {
# El Torito UEFI boot requires an image containing the EFI system partition.
# uefi-x64.grub.eltorito has the same requirements as uefi-x64.grub.esp
_run_once _make_bootmode_uefi-x64.grub.esp
# Prepare configuration files
_run_once _make_common_bootmode_grub_cfg
# Additionally set up systemd-boot in ISO 9660. This allows creating a medium for the live environment by using
# manual partitioning and simply copying the ISO 9660 file system contents.
# This is not related to El Torito booting and no firmware uses these files.
_msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
# Copy GRUB EFI binary to the default/fallback boot path
install -m 0644 -- "${work_dir}/BOOTx64.EFI" "${isofs_dir}/EFI/BOOT/BOOTx64.EFI"
# Copy GRUB files
_run_once _make_common_bootmode_grub_copy_to_isofs
# edk2-shell based UEFI shell
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" "${isofs_dir}/shellx64.efi"
fi
_msg_info "Done!"
}
_make_common_bootmode_systemd-boot() {
local _file efiboot_imgsize
local _available_ucodes=()
if (( need_external_ucodes )); then
for _file in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${_file}" ]]; then
_available_ucodes+=("${pacstrap_dir}/boot/${_file}")
fi
done
fi
# Calculate the required FAT image size in bytes
# shellcheck disable=SC2076
if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' || " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' ]]; then
efiboot_files+=("${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi"
"${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi")
fi
# shellcheck disable=SC2076
if [[ " ${bootmodes[*]} " =~ ' uefi-ia32.systemd-boot.esp ' || " ${bootmodes[*]} " =~ ' uefi-ia32.systemd-boot.eltorito ' ]]; then
efiboot_files+=("${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootia32.efi"
"${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi")
fi
efiboot_files+=("${work_dir}/loader/"
"${pacstrap_dir}/boot/vmlinuz-"*
"${pacstrap_dir}/boot/initramfs-"*".img"
"${_available_ucodes[@]}")
efiboot_imgsize="$(du -bcs -- "${efiboot_files[@]}" 2>/dev/null | awk 'END { print $1 }')"
# Create a FAT image for the EFI system partition
_make_efibootimg "$efiboot_imgsize"
}
_make_common_bootmode_systemd-boot_conf() {
local _conf
install -d -m 0755 -- "${work_dir}/loader" "${work_dir}/loader/entries"
install -m 0644 -- "${profile}/efiboot/loader/loader.conf" "${work_dir}/loader"
for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%ARCHISO_UUID%|${iso_uuid}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_conf}" >"${work_dir}/loader/entries/${_conf##*/}"
done
}
# Copy systemd-boot configuration files to ISO 9660
_make_common_bootmode_systemd-boot_conf.isofs() {
cp -r --remove-destination -- "${work_dir}/loader" "${isofs_dir}/"
}
# Copy systemd-boot configuration files to FAT image
_make_common_bootmode_systemd-boot_conf.esp() {
mcopy -i "${efibootimg}" -s "${work_dir}/loader" ::/
}
# Prepare systemd-boot for booting when written to a disk (isohybrid)
_make_bootmode_uefi-x64.systemd-boot.esp() {
_msg_info "Setting up systemd-boot for x64 UEFI booting..."
# Prepare configuration files
_run_once _make_common_bootmode_systemd-boot_conf
# Prepare a FAT image for the EFI system partition
_run_once _make_common_bootmode_systemd-boot
# Copy systemd-boot EFI binary to the default/fallback boot path
mcopy -i "${efibootimg}" \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" ::/EFI/BOOT/BOOTx64.EFI
# Copy systemd-boot configuration files
_run_once _make_common_bootmode_systemd-boot_conf.esp
# shellx64.efi is picked up automatically when on /
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
mcopy -i "${efibootimg}" \
"${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
fi
# Copy kernel and initramfs to FAT image.
# systemd-boot can only access files from the EFI system partition it was launched from.
_run_once _make_boot_on_fat
_msg_info "Done! systemd-boot set up for x64 UEFI booting successfully."
}
# Prepare systemd-boot for El Torito booting
_make_bootmode_uefi-x64.systemd-boot.eltorito() {
# Prepare configuration files
_run_once _make_common_bootmode_systemd-boot_conf
# El Torito UEFI boot requires an image containing the EFI system partition.
# uefi-x64.systemd-boot.eltorito has the same requirements as uefi-x64.systemd-boot.esp
_run_once _make_bootmode_uefi-x64.systemd-boot.esp
# Additionally set up systemd-boot in ISO 9660. This allows creating a medium for the live environment by using
# manual partitioning and simply copying the ISO 9660 file system contents.
# This is not related to El Torito booting and no firmware uses these files.
_msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
# Copy systemd-boot EFI binary to the default/fallback boot path
install -m 0644 -- "${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
"${isofs_dir}/EFI/BOOT/BOOTx64.EFI"
# Copy systemd-boot configuration files
_run_once _make_common_bootmode_systemd-boot_conf.isofs
# edk2-shell based UEFI shell
# shellx64.efi is picked up automatically when on /
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" "${isofs_dir}/shellx64.efi"
fi
_msg_info "Done!"
}
_make_bootmode_uefi-ia32.systemd-boot.esp() {
_msg_info "Setting up systemd-boot for IA32 UEFI booting..."
# Prepare configuration files
_run_once _make_common_bootmode_systemd-boot_conf
# Prepare a FAT image for the EFI system partition
_run_once _make_common_bootmode_systemd-boot
# Copy systemd-boot EFI binary to the default/fallback boot path
mcopy -i "${efibootimg}" \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootia32.efi" ::/EFI/BOOT/BOOTIA32.EFI
# Copy systemd-boot configuration files
_run_once _make_common_bootmode_systemd-boot_conf.esp
# shellia32.efi is picked up automatically when on /
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ]]; then
mcopy -i "${efibootimg}" \
"${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ::/shellia32.efi
fi
# Copy kernel and initramfs to FAT image.
# systemd-boot can only access files from the EFI system partition it was launched from.
_run_once _make_boot_on_fat
_msg_info "Done! systemd-boot set up for IA32 UEFI booting successfully."
}
_make_bootmode_uefi-ia32.systemd-boot.eltorito() {
# Prepare configuration files
_run_once _make_common_bootmode_systemd-boot_conf
# El Torito UEFI boot requires an image containing the EFI system partition.
# uefi-ia32.systemd-boot.eltorito has the same requirements as uefi-ia32.systemd-boot.esp
_run_once _make_bootmode_uefi-ia32.systemd-boot.esp
# Additionally set up systemd-boot in ISO 9660. This allows creating a medium for the live environment by using
# manual partitioning and simply copying the ISO 9660 file system contents.
# This is not related to El Torito booting and no firmware uses these files.
_msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
# Copy systemd-boot EFI binary to the default/fallback boot path
install -m 0644 -- "${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootia32.efi" \
"${isofs_dir}/EFI/BOOT/BOOTIA32.EFI"