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mkarchiso
executable file
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mkarchiso
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#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-3.0-or-later
set -e -u
# Control the environment
umask 0022
export LC_ALL="C"
export SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-"$(date +%s)"}"
# 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=""
iso_name=""
iso_label=""
iso_publisher=""
iso_application=""
iso_version=""
install_dir=""
arch=""
pacman_conf=""
packages=""
bootstrap_packages=""
pacstrap_dir=""
buildmodes=()
bootmodes=()
airootfs_image_type=""
airootfs_image_tool_options=()
cert_list=()
sign_netboot_artifacts=""
declare -A file_permissions=()
# adapted from GRUB_EARLY_INITRD_LINUX_STOCK in https://git.savannah.gnu.org/cgit/grub.git/tree/util/grub-mkconfig.in
readonly ucodes=('amd-uc.img' 'amd-ucode.img')
# 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
}
_mount_airootfs() {
trap "_umount_airootfs" EXIT HUP INT TERM
install -d -m 0755 -- "${work_dir}/mnt/airootfs"
_msg_info "Mounting '${pacstrap_dir}.img' on '${work_dir}/mnt/airootfs'..."
mount -- "${pacstrap_dir}.img" "${work_dir}/mnt/airootfs"
_msg_info "Done!"
}
_umount_airootfs() {
_msg_info "Unmounting '${work_dir}/mnt/airootfs'..."
umount -d -- "${work_dir}/mnt/airootfs"
_msg_info "Done!"
rmdir -- "${work_dir}/mnt/airootfs"
trap - EXIT HUP INT TERM
}
# 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: '${pacman_conf}'
-D <install_dir> Set an install_dir. All files will by located here.
Default: '${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
Multiple files are provided as quoted, space delimited list.
The first file is considered as the signing certificate,
the second as the key.
-g <gpg_key> Set the PGP key ID to be used for signing the rootfs image
-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: '${out_dir}'
-p [package ..] Package(s) to install.
Multiple packages are provided as quoted, space delimited list.
-v Enable verbose output
-w <work_dir> Set the working directory
Default: '${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
build_date="$(date --utc --iso-8601=seconds -d "@${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 "Code signing certificates: ${cert_list[*]}"
_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[*]}"
_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 an empty /etc/machine-id
rm -f -- "${pacstrap_dir}/etc/machine-id"
printf '' > "${pacstrap_dir}/etc/machine-id"
_msg_info "Done!"
}
# Create a squashfs image and place it in the ISO 9660 file system.
# $@: options to pass to mksquashfs
_run_mksquashfs() {
local image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
if [[ "${quiet}" == "y" ]]; then
mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}" -no-progress > /dev/null
else
mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}"
fi
}
# Create an ext4 image containing the root file system and pack it inside a squashfs image.
# Save the squashfs image on the ISO 9660 file system.
_mkairootfs_ext4+squashfs() {
[[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
_msg_info "Creating ext4 image of 32 GiB..."
if [[ "${quiet}" == "y" ]]; then
mkfs.ext4 -q -O '^has_journal,^resize_inode' -E 'lazy_itable_init=0' -m 0 -F -- "${pacstrap_dir}.img" 32G
else
mkfs.ext4 -O '^has_journal,^resize_inode' -E 'lazy_itable_init=0' -m 0 -F -- "${pacstrap_dir}.img" 32G
fi
tune2fs -c 0 -i 0 -- "${pacstrap_dir}.img" > /dev/null
_msg_info "Done!"
_mount_airootfs
_msg_info "Copying '${pacstrap_dir}/' to '${work_dir}/mnt/airootfs/'..."
cp -aT -- "${pacstrap_dir}/" "${work_dir}/mnt/airootfs/"
chown -- 0:0 "${work_dir}/mnt/airootfs/"
_msg_info "Done!"
_umount_airootfs
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 -- "${pacstrap_dir}.img"
}
# Create a squashfs image containing the root file system and saves it on the ISO 9660 file system.
_mkairootfs_squashfs() {
[[ -e "${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 "${pacstrap_dir}"
}
# Create an EROFS image containing the root file system and saves it on the ISO 9660 file system.
_mkairootfs_erofs() {
local fsuuid
[[ -e "${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}/${arch}/airootfs.erofs"
# Generate reproducible file system UUID from SOURCE_DATE_EPOCH
fsuuid="$(uuidgen --sha1 --namespace 93a870ff-8565-4cf3-a67b-f47299271a96 --name "${SOURCE_DATE_EPOCH}")"
_msg_info "Creating EROFS image, this may take some time..."
mkfs.erofs -U "${fsuuid}" "${airootfs_image_tool_options[@]}" -- "${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 -- "${OLDPWD}"
_msg_info "Done!"
}
# GPG sign the root file system image.
_mksignature() {
_msg_info "Signing rootfs image..."
cd -- "${isofs_dir}/${install_dir}/${arch}"
# always use the .sig file extension, as that is what mkinitcpio-archiso's hooks expect
if [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" ]]; then
gpg --output airootfs.sfs.sig --detach-sign --default-key "${gpg_key}" airootfs.sfs
elif [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.erofs" ]]; then
gpg --output airootfs.erofs.sig --detach-sign --default-key "${gpg_key}" airootfs.erofs
fi
cd -- "${OLDPWD}"
_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 '${pacstrap_dir}/'..."
if [[ -n "${gpg_key}" ]]; then
exec {ARCHISO_GNUPG_FD}<>"${work_dir}/pubkey.gpg"
export ARCHISO_GNUPG_FD
fi
# Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
if [[ "${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 [[ -n "${gpg_key}" ]]; then
exec {ARCHISO_GNUPG_FD}<&-
unset ARCHISO_GNUPG_FD
fi
_msg_info "Done! Packages installed successfully."
}
# Customize installation.
_make_customize_airootfs() {
local passwd=()
if [[ -e "${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}${passwd[5]}"
fi
cp -dnRT --preserve=mode,timestamps,links -- "${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
}
# 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/${arch}/"
for ucode_image in "${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
_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 -- "${isofs_dir}/syslinux"
for _cfg in "${profile}/syslinux/"*.cfg; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_cfg}" > "${isofs_dir}/syslinux/${_cfg##*/}"
done
if [[ -e "${profile}/syslinux/splash.png" ]]; then
install -m 0644 -- "${profile}/syslinux/splash.png" "${isofs_dir}/syslinux/"
fi
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/"*.c32 "${isofs_dir}/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/lpxelinux.0" "${isofs_dir}/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/memdisk" "${isofs_dir}/syslinux/"
_run_once _make_boot_on_iso9660
if [[ -e "${isofs_dir}/syslinux/hdt.c32" ]]; then
install -d -m 0755 -- "${isofs_dir}/syslinux/hdt"
if [[ -e "${pacstrap_dir}/usr/share/hwdata/pci.ids" ]]; then
gzip -cn9 "${pacstrap_dir}/usr/share/hwdata/pci.ids" > \
"${isofs_dir}/syslinux/hdt/pciids.gz"
fi
find "${pacstrap_dir}/usr/lib/modules" -name 'modules.alias' -print -exec gzip -cn9 '{}' ';' -quit > \
"${isofs_dir}/syslinux/hdt/modalias.gz"
fi
# Add other aditional/extra files to ${install_dir}/boot/
if [[ -e "${pacstrap_dir}/boot/memtest86+/memtest.bin" ]]; then
# rename for PXE: https://wiki.archlinux.org/title/Syslinux#Using_memtest
install -m 0644 -- "${pacstrap_dir}/boot/memtest86+/memtest.bin" "${isofs_dir}/${install_dir}/boot/memtest"
install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/common/GPL2/license.txt" \
"${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
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 -- "${isofs_dir}/syslinux"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isolinux.bin" "${isofs_dir}/syslinux/"
install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isohdpfx.bin" "${isofs_dir}/syslinux/"
# ISOLINUX and SYSLINUX installation is shared
_run_once _make_bootmode_bios.syslinux.mbr
_msg_info "Done! SYSLINUX set up for BIOS booting from an optical disc successfully."
}
# Copy kernel and initramfs to FAT image
_make_boot_on_fat() {
local ucode_image all_ucode_images=()
_msg_info "Preparing kernel and initramfs for the FAT file system..."
mmd -i "${work_dir}/efiboot.img" \
"::/${install_dir}" "::/${install_dir}/boot" "::/${install_dir}/boot/${arch}"
mcopy -i "${work_dir}/efiboot.img" "${pacstrap_dir}/boot/vmlinuz-"* \
"${pacstrap_dir}/boot/initramfs-"*".img" "::/${install_dir}/boot/${arch}/"
for ucode_image in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${ucode_image}" ]]; then
all_ucode_images+=("${pacstrap_dir}/boot/${ucode_image}")
fi
done
if (( ${#all_ucode_images[@]} )); then
mcopy -i "${work_dir}/efiboot.img" "${all_ucode_images[@]}" "::/${install_dir}/boot/"
fi
_msg_info "Done!"
}
# Copy kernel and initramfs to FAT image
_make_boot_on_fat_aarch64() {
local ucode_image all_ucode_images=()
_msg_info "Preparing kernel and initramfs for the FAT aarch64 file system..."
mmd -i "${work_dir}/efiboot.img" \
"::/${install_dir}" "::/${install_dir}/boot" "::/${install_dir}/boot/${arch}"
mcopy -i "${work_dir}/efiboot.img" "${pacstrap_dir}/boot/Image"* \
"${pacstrap_dir}/boot/initramfs-"*".img" "::/${install_dir}/boot/${arch}/"
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 (( ${#all_ucode_images[@]} )); then
mcopy -i "${work_dir}/efiboot.img" "${all_ucode_images[@]}" "::/${install_dir}/boot/"
fi
_msg_info "Done!"
}
# Create a FAT image (efiboot.img) which will serve as the EFI system partition
# $1: image size in bytes
_make_efibootimg() {
local imgsize="0"
# Convert from bytes to KiB and round up to the next full MiB with an additional MiB for reserved sectors.
imgsize="$(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($1)+1024)/1024))}' <<< "${1}"
)"
# 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
[[ -e "${work_dir}/efiboot.img" ]] && rm -f -- "${work_dir}/efiboot.img"
_msg_info "Creating FAT image of size: ${imgsize} KiB..."
mkfs.fat -C -n ARCHISO_EFI "${work_dir}/efiboot.img" "${imgsize}"
# Create the default/fallback boot path in which a boot loaders will be placed later.
mmd -i "${work_dir}/efiboot.img" ::/EFI ::/EFI/BOOT
}
# Prepare system-boot for booting when written to a disk (isohybrid)
_make_bootmode_uefi-x64.systemd-boot.esp() {
local _file efiboot_imgsize
local _available_ucodes=()
_msg_info "Setting up systemd-boot for UEFI booting..."
for _file in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${_file}" ]]; then
_available_ucodes+=("${pacstrap_dir}/boot/${_file}")
fi
done
# Calculate the required FAT image size in bytes
efiboot_imgsize="$(du -bc \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
"${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" \
"${profile}/efiboot/" \
"${pacstrap_dir}/boot/vmlinuz-"* \
"${pacstrap_dir}/boot/initramfs-"*".img" \
"${_available_ucodes[@]}" \
2>/dev/null | awk 'END { print $1 }')"
# Create a FAT image for the EFI system partition
_make_efibootimg "$efiboot_imgsize"
# Copy systemd-boot EFI binary to the default/fallback boot path
mcopy -i "${work_dir}/efiboot.img" \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" ::/EFI/BOOT/BOOTx64.EFI
# Copy systemd-boot configuration files
mmd -i "${work_dir}/efiboot.img" ::/loader ::/loader/entries
mcopy -i "${work_dir}/efiboot.img" "${profile}/efiboot/loader/loader.conf" ::/loader/
for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_conf}" | mcopy -i "${work_dir}/efiboot.img" - "::/loader/entries/${_conf##*/}"
done
# shellx64.efi is picked up automatically when on /
if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
mcopy -i "${work_dir}/efiboot.img" \
"${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
fi
# Copy kernel and initramfs to FAT image.
# systemd-boot can only access files from the EFI system partition it was launched from.
_make_boot_on_fat
_msg_info "Done! systemd-boot set up for UEFI booting successfully."
}
# Prepare system-boot for booting when written to a disk (isohybrid)
_make_bootmode_uefi-aarch64.systemd-boot.esp() {
local _file efiboot_imgsize
local _available_ucodes=()
_msg_info "Setting up systemd-boot for aarch64 UEFI booting..."
for _file in "${ucodes[@]}"; do
if [[ -e "${pacstrap_dir}/boot/${_file}" ]]; then
_available_ucodes+=("${pacstrap_dir}/boot/${_file}")
fi
done
# Calculate the required FAT image size in bytes
efiboot_imgsize="$(du -bc \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootaa64.efi" \
"${profile}/efiboot/" \
"${pacstrap_dir}/boot/Image"* \
"${pacstrap_dir}/boot/Image.gz"* \
"${pacstrap_dir}/boot/initramfs-"*".img" \
"${_available_ucodes[@]}" \
2>/dev/null | awk 'END { print $1 }')"
# Create a FAT image for the EFI system partition
_make_efibootimg "$efiboot_imgsize"
# Copy systemd-boot EFI binary to the default/fallback boot path
mcopy -i "${work_dir}/efiboot.img" \
"${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootaa64.efi" ::/EFI/BOOT/BOOTAA64.EFI
# Copy systemd-boot configuration files
mmd -i "${work_dir}/efiboot.img" ::/loader ::/loader/entries
mcopy -i "${work_dir}/efiboot.img" "${profile}/efiboot/loader/loader.conf" ::/loader/
for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_conf}" | mcopy -i "${work_dir}/efiboot.img" - "::/loader/entries/${_conf##*/}"
done
# Copy kernel and initramfs to FAT image.
# systemd-boot can only access files from the EFI system partition it was launched from.
_make_boot_on_fat_aarch64
_msg_info "Done! systemd-boot set up for aarch64 UEFI booting successfully."
}
# Prepare system-boot for El Torito booting
_make_bootmode_uefi-x64.systemd-boot.eltorito() {
# 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 system-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" \
"${isofs_dir}/EFI/BOOT/BOOTx64.EFI"
# Copy systemd-boot configuration files
install -d -m 0755 -- "${isofs_dir}/loader/entries"
install -m 0644 -- "${profile}/efiboot/loader/loader.conf" "${isofs_dir}/loader/"
for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_conf}" > "${isofs_dir}/loader/entries/${_conf##*/}"
done
# edk2-shell based UEFI shell
# shellx64.efi is picked up automatically when on /
if [[ -e "${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!"
}
# Prepare aarch64 system-boot for El Torito booting
_make_bootmode_uefi-aarch64.systemd-boot.eltorito() {
# El Torito UEFI boot requires an image containing the EFI system partition.
# uefi-aarch64.systemd-boot.eltorito has the same requirements as uefi-aarch64.systemd-boot.esp
_run_once _make_bootmode_uefi-aarch64.systemd-boot.esp
# Additionally set up system-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 aarch64 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-bootaa64.efi" \
"${isofs_dir}/EFI/BOOT/BOOTAA64.EFI"
# Copy systemd-boot configuration files
install -d -m 0755 -- "${isofs_dir}/loader/entries"
install -m 0644 -- "${profile}/efiboot/loader/loader.conf" "${isofs_dir}/loader/"
for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" \
"${_conf}" > "${isofs_dir}/loader/entries/${_conf##*/}"
done
_msg_info "Done!"
}
_validate_requirements_bootmode_bios.syslinux.mbr() {
# bios.syslinux.mbr requires bios.syslinux.eltorito
# shellcheck disable=SC2076
if [[ ! " ${bootmodes[*]} " =~ ' bios.syslinux.eltorito ' ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Using 'bios.syslinux.mbr' boot mode without 'bios.syslinux.eltorito' is not supported." 0
fi
# Check if the syslinux package is in the package list
# shellcheck disable=SC2076
if [[ ! " ${pkg_list[*]} " =~ ' syslinux ' ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': The 'syslinux' package is missing from the package list!" 0
fi
# Check if syslinux configuration files exist
if [[ ! -d "${profile}/syslinux" ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': The '${profile}/syslinux' directory is missing!" 0
else
local cfgfile
for cfgfile in "${profile}/syslinux/"*'.cfg'; do
if [[ -e "${cfgfile}" ]]; then
break
else
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': No configuration file found in '${profile}/syslinux/'!" 0
fi
done
fi
# Check for optional packages
# shellcheck disable=SC2076
if [[ ! " ${pkg_list[*]} " =~ ' memtest86+ ' ]]; then
_msg_info "Validating '${bootmode}': 'memtest86+' is not in the package list. Memmory testing will not be available from syslinux."
fi
}
_validate_requirements_bootmode_bios.syslinux.eltorito() {
# bios.syslinux.eltorito has the exact same requirements as bios.syslinux.mbr
_validate_requirements_bootmode_bios.syslinux.mbr
}
_validate_requirements_bootmode_uefi-x64.systemd-boot.esp() {
# Check if mkfs.fat is available
if ! command -v mkfs.fat &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
fi
# Check if mmd and mcopy are available
if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
_msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
fi
# Check if systemd-boot configuration files exist
if [[ ! -d "${profile}/efiboot/loader/entries" ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': The '${profile}/efiboot/loader/entries' directory is missing!" 0
else
if [[ ! -e "${profile}/efiboot/loader/loader.conf" ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': File '${profile}/efiboot/loader/loader.conf' not found!" 0
fi
local conffile
for conffile in "${profile}/efiboot/loader/entries/"*'.conf'; do
if [[ -e "${conffile}" ]]; then
break
else
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': No configuration file found in '${profile}/efiboot/loader/entries/'!" 0
fi
done
fi
# Check for optional packages
# shellcheck disable=SC2076
if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
_msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
fi
}
_validate_requirements_bootmode_uefi-aarch64.systemd-boot.esp() {
# Check if mkfs.fat is available
if ! command -v mkfs.fat &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
fi
# Check if mmd and mcopy are available
if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
_msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
fi
# Check if systemd-boot configuration files exist
if [[ ! -d "${profile}/efiboot/loader/entries" ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': The '${profile}/efiboot/loader/entries' directory is missing!" 0
else
if [[ ! -e "${profile}/efiboot/loader/loader.conf" ]]; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': File '${profile}/efiboot/loader/loader.conf' not found!" 0
fi
local conffile
for conffile in "${profile}/efiboot/loader/entries/"*'.conf'; do
if [[ -e "${conffile}" ]]; then
break
else
(( validation_error=validation_error+1 ))
_msg_error "Validating '${bootmode}': No configuration file found in '${profile}/efiboot/loader/entries/'!" 0
fi
done
fi
# Check for optional packages
# shellcheck disable=SC2076
if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
_msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
fi
}
_validate_requirements_bootmode_uefi-x64.systemd-boot.eltorito() {
# uefi-x64.systemd-boot.eltorito has the exact same requirements as uefi-x64.systemd-boot.esp
_validate_requirements_bootmode_uefi-x64.systemd-boot.esp
}
_validate_requirements_bootmode_uefi-aarch64.systemd-boot.eltorito() {
# uefi-aarch64.systemd-boot.eltorito has the exact same requirements as uefi-aarch64.systemd-boot.esp
_validate_requirements_bootmode_uefi-aarch64.systemd-boot.esp
}
# Build airootfs filesystem image
_prepare_airootfs_image() {
_run_once "_mkairootfs_${airootfs_image_type}"
_mkchecksum
if [[ -n "${gpg_key}" ]]; then
_mksignature
fi
}
# export build artifacts for netboot
_export_netboot_artifacts() {
_msg_info "Exporting netboot artifacts..."
install -d -m 0755 "${out_dir}"
cp -a -- "${isofs_dir}/${install_dir}/" "${out_dir}/"
_msg_info "Done!"
du -h -- "${out_dir}/${install_dir}"
}
# sign build artifacts for netboot
_sign_netboot_artifacts() {
local _file _dir
local _files_to_sign=()
_msg_info "Signing netboot artifacts..."
_dir="${isofs_dir}/${install_dir}/boot/"
for _file in "${ucodes[@]}"; do
if [[ -e "${_dir}${_file}" ]]; then
_files_to_sign+=("${_dir}${_file}")
fi
done
# TODO: should Image and Image.gz be added here?
for _file in "${_files_to_sign[@]}" "${_dir}${arch}/vmlinuz-"* "${_dir}${arch}/initramfs-"*.img; do
openssl cms \
-sign \
-binary \
-noattr \
-in "${_file}" \
-signer "${cert_list[0]}" \
-inkey "${cert_list[1]}" \
-outform DER \
-out "${_file}".ipxe.sig
done
_msg_info "Done!"
}
_validate_requirements_airootfs_image_type_squashfs() {
if ! command -v mksquashfs &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${airootfs_image_type}': mksquashfs is not available on this host. Install 'squashfs-tools'!" 0
fi
}
_validate_requirements_airootfs_image_type_ext4+squashfs() {
if ! { command -v mkfs.ext4 &> /dev/null && command -v tune2fs &> /dev/null; }; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${airootfs_image_type}': mkfs.ext4 and/or tune2fs is not available on this host. Install 'e2fsprogs'!" 0
fi
_validate_requirements_airootfs_image_type_squashfs
}
_validate_requirements_airootfs_image_type_erofs() {
if ! command -v mkfs.erofs; then
(( validation_error=validation_error+1 ))
_msg_error "Validating '${airootfs_image_type}': mkfs.erofs is not available on this host. Install 'erofs-utils'!" 0
fi
}
_validate_requirements_buildmode_all() {
if ! command -v pacman &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': pacman is not available on this host. Install 'pacman'!" 0
fi
if ! command -v find &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': find is not available on this host. Install 'findutils'!" 0
fi
if ! command -v gzip &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': gzip is not available on this host. Install 'gzip'!" 0
fi
}
_validate_requirements_buildmode_bootstrap() {
_validate_requirements_buildmode_all
if ! command -v bsdtar &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': bsdtar is not available on this host. Install 'libarchive'!" 0
fi
}
_validate_requirements_buildmode_iso() {
_validate_requirements_buildmode_all
if ! command -v awk &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': awk is not available on this host. Install 'awk'!" 0
fi
}
_validate_requirements_buildmode_netboot() {
_validate_requirements_buildmode_all
if ! command -v openssl &> /dev/null; then
(( validation_error=validation_error+1 ))
_msg_error "Validating build mode '${_buildmode}': openssl is not available on this host. Install 'openssl'!" 0
fi
}
# SYSLINUX El Torito
_add_xorrisofs_options_bios.syslinux.eltorito() {
xorrisofs_options+=(
# El Torito boot image for x86 BIOS
'-eltorito-boot' 'syslinux/isolinux.bin'
# El Torito boot catalog file
'-eltorito-catalog' 'syslinux/boot.cat'
# Required options to boot with ISOLINUX
'-no-emul-boot' '-boot-load-size' '4' '-boot-info-table'
)
}
# SYSLINUX MBR (isohybrid)
_add_xorrisofs_options_bios.syslinux.mbr() {
xorrisofs_options+=(
# SYSLINUX MBR bootstrap code; does not work without "-eltorito-boot syslinux/isolinux.bin"
'-isohybrid-mbr' "${isofs_dir}/syslinux/isohdpfx.bin"
# When GPT is used, create an additional partition in the MBR (besides 0xEE) for sectors 0–1 (MBR
# bootstrap code area) and mark it as bootable
# May allow booting on some systems
# https://wiki.archlinux.org/title/Partitioning#Tricking_old_BIOS_into_booting_from_GPT
'--mbr-force-bootable'
# Move the first partition away from the start of the ISO to match the expectations of partition editors
# May allow booting on some systems
# https://dev.lovelyhq.com/libburnia/libisoburn/src/branch/master/doc/partition_offset.wiki
'-partition_offset' '16'
)
}
# systemd-boot in an attached EFI system partition
_add_xorrisofs_options_uefi-x64.systemd-boot.esp() {
# Move the first partition away from the start of the ISO, otherwise the GPT will not be valid and ISO 9660
# partition will not be mountable
# shellcheck disable=SC2076
[[ " ${xorrisofs_options[*]} " =~ ' -partition_offset ' ]] || xorrisofs_options+=('-partition_offset' '16')
# Attach efiboot.img as a second partition and set its partition type to "EFI system partition"
xorrisofs_options+=('-append_partition' '2' 'C12A7328-F81F-11D2-BA4B-00A0C93EC93B' "${work_dir}/efiboot.img")
# Ensure GPT is used as some systems do not support UEFI booting without it
# shellcheck disable=SC2076
if [[ " ${bootmodes[*]} " =~ ' bios.syslinux.mbr ' ]]; then
# A valid GPT prevents BIOS booting on some systems, instead use an invalid GPT (without a protective MBR).
# The attached partition will have the EFI system partition type code in MBR, but in the invalid GPT it will
# have a Microsoft basic partition type code.
if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' ]]; then
# If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
# EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
# the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
if [[ ! " ${xorrisofs_options[*]} " =~ ' -isohybrid-gpt-basdat ' ]]; then
xorrisofs_options+=('-isohybrid-gpt-basdat')
fi
fi
else
# Use valid GPT if BIOS booting support will not be required
xorrisofs_options+=('-appended_part_as_gpt')
fi
}
# systemd-boot in an attached EFI system partition
_add_xorrisofs_options_uefi-aarch64.systemd-boot.esp() {
# Move the first partition away from the start of the ISO, otherwise the GPT will not be valid and ISO 9660
# partition will not be mountable
# shellcheck disable=SC2076
[[ " ${xorrisofs_options[*]} " =~ ' -partition_offset ' ]] || xorrisofs_options+=('-partition_offset' '16')
# Attach efiboot.img as a second partition and set its partition type to "EFI system partition"
xorrisofs_options+=('-append_partition' '2' 'C12A7328-F81F-11D2-BA4B-00A0C93EC93B' "${work_dir}/efiboot.img")
# Use valid GPT as BIOS booting support will not be required
xorrisofs_options+=('-appended_part_as_gpt')
}
# systemd-boot via El Torito
_add_xorrisofs_options_uefi-x64.systemd-boot.eltorito() {
# shellcheck disable=SC2076
if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' ]]; then
# systemd-boot in an attached EFI system partition via El Torito
xorrisofs_options+=(